P37E.pdf
Feb. 1,2022
Piezoelectric Sound
Components
!Note • Please read rating and !CAUTION (for storage, operating, rating, soldering, mounting and handling) in this catalog to prevent smoking and/or burning, etc.
• This catalog is for reference only and not an official product specification document, therefore, please review and approve our official product specification before ordering this product.
EU RoHS Compliant
• All the products in this catalog comply
with EU RoHS.
• EU RoHS is "the European Directive
2011/65/EU on the Restriction of the
Use of Certain Hazardous Substances in
Electrical and Electronic Equipment."
• For more details, please refer to our web
page, "Murata's Approach for EU RoHS"
(https://www.murata.com/en-eu/support/
compliance/rohs).
P37E.pdf
Feb. 1,2022
!Note • Please read rating and !CAUTION (for storage, operating, rating, soldering, mounting and handling) in this catalog to prevent smoking and/or burning, etc.
• This catalog is for reference only and not an official product specification document, therefore, please review and approve our official product specification before ordering this product.
P37E.pdf
Feb. 1,2022
1
Contents
Product specifications are as of February 2022.
Part Numbering
p2
2
1 Piezoelectric Sounders
SMD Type Product Lineup
p4
Pin Type Product Lineup
p8
Pin Type Taping Product Lineup
p10
Drive Method
p12
!Caution · Notice
p13
2 Piezoelectric Buzzers
Product Lineup
p15
!Caution · Notice
p16
3 Piezoelectric Diaphragms
Product Lineup
p18
Design Procedures · Drive Method
p19
!Caution · Notice
p20
Oscillating System
p22
To Raise Sound Pressure Level (S.P.L.)
p23
Measuring Method
p24
Minimum Quantity
p25
Please check the MURATA website (https://www.murata.com/)
if you cannot find a part number in this catalog.
3
!Note • Please read rating and !CAUTION (for storage, operating, rating, soldering, mounting and handling) in this catalog to prevent smoking and/or burning, etc.
• This catalog is for reference only and not an official product specification document, therefore, please review and approve our official product specification before ordering this product.
o Part Numbering
SMD Piezoelectric Sounder
(Part Number)
PK
LCS
1212
1
2
3
40
**
-R1
4 5
6
7
E
1Product ID
4Drive
Product ID
PK
Piezoelectric Sound Components
Code
Drive
E
External Drive
5Oscillating Frequency Type
2Product
Code
Product
LCS/MCS
SMD Sounder
Expressed resonant frequency by two-digit alphanumerics. The
unit is in 100 hertz (Hz.) 4kHz (4000Hz) is denoted as "40."
6Individual Specification Code
3Dimensions
Code
Outer Dimensions
1818
p18mm
1212
p12mm
0909
p9mm
Code
Individual Specification Code
**
Two digits express specific specification
in characteristics.
7Packaging
Code
Packaging
-R1
Plastic Taping
Pin Type Piezoelectric Sounders/Piezoelectric Buzzers
(Part Number)
P
P-
20
**
P
-A0
3 4 5
6
7
8
9
:
PK
M 17 E
1
2
7Oscillating Frequency Type
1Product ID
Product ID
PK
Piezoelectric Sound Components
8Individual Specification Code
2Product
Code
Product
M
Sounder
B
Buzzer
Code
**
Individual Specification Code
Two digits express custom specification in
characteristics.
9Special Quality Guarantee
3Outer Dimensions
Ex.)
Expressed resonant frequency by two-digit alphanumerics. The
unit is in 100 hertz (Hz). In case of 2kHz (2000Hz), expressed as
"20."
Code
Outer Dimensions
Code
17
ø17.0mm
P
Special Quality Guarantee
Post Plated Terminal
e
Not Post Plated Terminal (Blank)
4Drive
Drive
E
External-Drive
Code
S
Self-Drive
-B0
Bulk
-A0
Radial Taping
5Outer Electrode Style
Code
Outer Electrode Style
P
Pin Type
6Structure
Code
Structure
Pp
Flat Type Auto-assemble
Yp
Flat Type/Available for Taping
Cp
Flat Type/Semi-auto-assemble
p
Exclude above mentioned
p signifies specification of the outer electrode.
2
:Packaging
Code
Packaging
Radial taping is not available for all types.
Please contact us.
P37E.pdf
Feb. 1,2022
!Note • Please read rating and !CAUTION (for storage, operating, rating, soldering, mounting and handling) in this catalog to prevent smoking and/or burning, etc.
• This catalog is for reference only and not an official product specification document, therefore, please review and approve our official product specification before ordering this product.
P37E.pdf
Feb. 1,2022
Pin Type Piezoelectric Sounders (PKHPS Series)
(Part Number)
PK
HPS
0013
1
2
3
40
**
-A2
4 5
6
7
E
1Product ID
5Oscillating Frequency Type
Product ID
PK
Piezoelectric Sound Components
Expressed resonant frequency by two-digit alphanumerics. The
unit is in 100 hertz (Hz.) 4kHz (4000Hz) is denoted as "40."
6Individual Specification Code
2Product
Code
Product
HPS
Pin Type Sounder
3Dimensions
Code
Outer Dimensions
0013
ø12.6mm
Code
Individual Specification Code
**
Two digits express specific specification
in characteristics.
7Packaging
Code
Packaging
-A2
Radial Taping
4Drive
Code
Drive
E
External Drive
Piezoelectric Diaphragms
7 N
(Part Number)
B
1 2 3
-****
-1R5
4
5
L
10
6 7
1Product ID
5Resonant Frequency Type
Product ID
7
Ceramic Material
2Metal Plate Material
Code
Metal Plate Material
B
Brass
N
Nickel Alloy
3Product
Code
Product
B
Piezoelectric Diaphragms
A hyphen (-) and three-digit alphanumerics express resonant
frequency. A decimal point is expressed by the capital letter "R." If
there is no decimal point, the decimal point code is omitted.
6Product Specification
Code
Product Specification
L
With lead (available for RoHS)
e
No lead (omitted)
7Individual Specification Code
These digits express a lead length, lead number, and the
presence/absence of a connector. If the product has no individual
specification, the corresponding code is omitted.
4Metal Plate Diameter
Code
-****
Metal Plate Diameter
A hyphen (-) plus from two to four-digit
alphanumerics express metal plate outer
dimensions. A decimal point is expressed by
the capital letter "R."
3
P37E.pdf
!Note • Please read rating and !CAUTION (for storage, operating, rating, soldering, mounting and handling) in this catalog to prevent smoking and/or burning, etc.
• This catalog is for reference only and not an official product specification document, therefore, please review and approve our official product specification before ordering this product.
Piezoelectric Sound Components
RoHS
(0.4)
Piezoelectric Sounders SMD Type
Taking advantage of extensive acoustic and mechanical
design technology and high performance ceramics,
Murata has developed SMD piezoelectric sounders that
suit the thin, high-density design of electronic
equipment.
3.0 max.
(3.3)
Sound Emitting Hole
12.0
(ø0.15) Open Hole
(3.0)
1. Small, thin and lightweight
2. High sound pressure level and clear sound
3. Reflowable
4. Tape & Reel supply
(3.3)
( ): Ref. only
Tol.: ±0.2
(in mm)
(Note) The location of open hole is not specified.
9.0
(1.5)
(1.5)
(0.9)
(1.9)
Marking
: PKLCS1212E2000-R1
PKLCS1212E20A0-R1
: PKLCS1212E2400-R1
PKLCS1212E24A0-R1
10.0
3.0 max.
PKLCS1212E2400-R1
PKLCS1212E24A0-R1
(2.2)
Features
4.0
*
12.0
PKLCS1212E2000-R1
PKLCS1212E20A0-R1
1.1
(3.0)
Sound Emitting Hole
0.6
9.0
Sound Emitting Hole
12.0
1.9 max.
(0.3)
4.0
12.0
1.2
(2.0)
(0.7)
3.2
1
Feb. 1,2022
Open Hole
(6.4)
(1.5)
10.0
PKMCS0909E4000-R1
6.4
9.0
(1.82)
Sound Emitting Hole
0.7
9.0
2.7
6.4
18.0
(1.82)
Sound Emitting Hole
0.95
(4.5)
(1.4)
(1.0)
(10.4)
16.0
(2.0)
+Tarminal
PKMCS1818E20A0-R1
( ): Ref. only
Tol.: ±0.2
1.0
Open Hole
(1.5)
-Tarminal
(0.4)
+
Polarity:
+terminal (Hot Side of D.C.)
-terminal (0V)
1.0
3.0 max.
(0.8)
(14.2)
(1.4)
(0.3)
(14.2)
(6.1)
(1.8)
18.0
(3.2)
8.0 max.
(2.0)
(0.4)
( ): Ref. only
Tol.: ±0.2
(in mm)
(Note) The location of sound emitting hole is not specified.
1.0
( ): Ref. only
Tol.: ±0.2
(in mm)
3.2
(2.1)
PKLCS1212E4001-R1
PKLCS1212E40A1-R1
PKMCS0909E48H0-R1
1.0
(in mm)
( ): Ref. only
Tol.: ±0.2
(in mm)
For Consumer
Part Number
Sound Pressure Level
(typ.)
Operating
Voltage Range*
(Vo-p)
Capacitance
(nF)
Ref. only
Operating
Temp. Range
(°C)
Storage
Temp. Range
(°C)
PKLCS1212E2000-R1
76dB [±1.5Vo-p,2.0kHz,square wave,10cm]
±12.5 max.
(28.0)
-20 to +70
-30 to +80
PKLCS1212E2400-R1
80dB [±1.5Vo-p,2.4kHz,square wave,10cm]
±12.5 max.
(28.0)
-20 to +70
-30 to +80
PKLCS1212E4001-R1
84dB [±1.5Vo-p,4.0kHz,square wave,10cm]
±12.5 max.
(19.5)
-20 to +70
-30 to +80
PKMCS0909E4000-R1
72dB [±1.5Vo-p,4.0kHz,square wave,10cm]
±12.5 max.
(9.0)
-40 to +85
-40 to +85
PKMCS0909E48H0-R1
75dB [±2.5Vo-p,4.8kHz,square wave,10cm]
±12.5 max.
(9.0)
-40 to +85
-40 to +85
*Operating Voltage Range: Does not contain Direct Current bias.
4
P37E.pdf
!Note • Please read rating and !CAUTION (for storage, operating, rating, soldering, mounting and handling) in this catalog to prevent smoking and/or burning, etc.
• This catalog is for reference only and not an official product specification document, therefore, please review and approve our official product specification before ordering this product.
Feb. 1,2022
For Automotive
Part Number
Sound Pressure Level
(typ.)
Operating
Voltage Range*
(Vo-p)
Capacitance
(nF)
Ref. only
Operating
Temp. Range
(°C)
Storage
Temp. Range
(°C)
PKLCS1212E20A0-R1
76dB [±1.5Vo-p,2.0kHz,square wave,10cm]
±12.5 max.
(28.0)
-40 to +85
-40 to +85
PKLCS1212E24A0-R1
80dB [±1.5Vo-p,2.4kHz,square wave,10cm]
±12.5 max.
(28.0)
-40 to +85
-40 to +85
PKLCS1212E40A1-R1
84dB [±1.5Vo-p,4.0kHz,square wave,10cm]
±12.5 max.
(19.5)
-40 to +85
-40 to +85
PKMCS1818E20A0-R1
100dB [12Vo-p,2.0kHz,square wave,10cm]
18.0Vo-p [with polarity]
(33.0)
1
-40 to +105 -40 to +105
*Operating Voltage Range: Does not contain Direct Current bias.
Standard Land Pattern Dimensions
PKLCS1212E Series
PKMCS0909E Series
10.0
10.0
7.4
4.0
3.4
12.4
(in mm)
(in mm)
PKMCS1818E Series
18.4
1.2
6.4
2.7
1.2
6.4
16.0
(in mm)
Frequency Response
PKLCS1212E2000-R1 / PKLCS1212E20A0-R1
Conditions: 10cm, A-filter
PKLCS1212E2400-R1 / PKLCS1212E24A0-R1
Conditions: 10cm, A-filter
100
100
Square wave, ±1.5Vo-p
90
85
80
75
70
65
60
55
50
Square wave, ±1.5Vo-p
95
Sound Pressure Level (dB)
Sound Pressure Level (dB)
95
90
85
80
75
70
65
60
55
0
1
2
3
4
5
6
Frequency (kHz)
7
8
9
10
50
0
1
2
3
4
5
6
Frequency (kHz)
7
8
9
10
Continued on the following page.
5
P37E.pdf
!Note • Please read rating and !CAUTION (for storage, operating, rating, soldering, mounting and handling) in this catalog to prevent smoking and/or burning, etc.
• This catalog is for reference only and not an official product specification document, therefore, please review and approve our official product specification before ordering this product.
Feb. 1,2022
Continued from the preceding page.
Frequency Response
PKLCS1212E4001-R1 / PKLCS1212E40A1-R1
Conditions: 10cm, A-filter
1
PKMCS0909E4000-R1
Conditions: 10cm, A-filter
100
100
Square wave, ±1.5Vo-p
90
85
80
75
70
65
60
55
50
Square wave, ±1.5Vo-p
95
Sound Pressure Level (dB)
Sound Pressure Level (dB)
95
90
85
80
75
70
65
60
55
0
1
2
3
4
5
6
Frequency (kHz)
7
8
9
50
10
0
1
2
PKMCS1818E20A0-R1
Conditions: 10cm, A-filter
120
7
8
9
10
100
Square Wave, 12Vo-p
Square wave, ±2.5Vo-p
95
Sound Pressure Level (dB)
Sound Pressure Level (dB)
4
5
6
Frequency (kHz)
PKMCS0909E48H0-R1
Conditions: 10cm, A-filter
110
100
90
80
70
60
50
3
90
85
80
75
70
65
60
55
0
1
2
Frequency (kHz)
3
4
50
0
1
2
3
4
5
6
Frequency (kHz)
7
8
9
10
Taping Dimension PKLCS1212E Series
ø330±2
ø80±1
11.5±0.1
Trailer
Components
160–200
12.5±0.1
+0.1
ø1.50 -0.0
2.0±0.1
24.0±0.2
4.0±0.1
Dimensions of Reel
1.75±0.1
Dimensions of Carrier Tape
25.4±1.0
29.4±1.0
16.0±0.1
Direction of Feed
3.1±0.1
2.0±0.5
Cover Film
240–280
Empty
400–560
Leader
13.0±0.2
Cover film peel strength force: 0.1–0.7N
Cover film peel speed: 300mm/min.
Cover Film
12.5±0.1
6
10°
(in mm)
P37E.pdf
!Note • Please read rating and !CAUTION (for storage, operating, rating, soldering, mounting and handling) in this catalog to prevent smoking and/or burning, etc.
• This catalog is for reference only and not an official product specification document, therefore, please review and approve our official product specification before ordering this product.
Feb. 1,2022
Taping Dimension PKMCS0909E40 Series
12.0±0.1
Components
(ø330)
7.5±0.1
00*
00*
00*
00*
9.5±0.1
9.5±0.1
Direction of Feed
Trailer
160 to 200
0.3±0.1
(ø80)
+0.1
ø1.5–0.0
2.0±0.1
16.0±0.3
4.0±0.1
1
Dimensions of Plastic Reel
1.75±0.1
Dimensions of Plastic Tape
2.4±0.2
Cover film
2.0±0.5
240 to 280
Empty
400 to 560
Leader
ø13.0±0.5
17.4±1.0
Cover Film
22.5 max.
10°
Cover film peel strength force 0.1 to 0.7N
Cover film peel speed 300mm/min.
(in mm)
Taping Dimension PKMCS0909E48H0 Series
12.0±0.1
Components
(ø330)
7.5±0.1
00*
00*
00*
00*
9.5±0.1
9.5±0.1
Direction of Feed
Trailer
160 to 200
0.3±0.1
(ø80)
+0.1
ø1.5–0.0
2.0±0.1
16.0±0.3
4.0±0.1
Dimensions of Plastic Reel
1.75±0.1
Dimensions of Plastic Tape
3.3±0.2
Cover film
2.0±0.5
240 to 280
Empty
400 to 560
Leader
ø13.0±0.5
17.4±1.0
Cover Film
22.5 max.
10°
Cover film peel strength force 0.1 to 0.7N
Cover film peel speed 300mm/min.
(in mm)
Taping Dimension PKMCS1818E Series
ø330±2
Trailer
Components
160–200
ø80±1
14.2±0.1
0.2±0.1
Direction of Feed
1.7±0.1
1.5±0.1
24±0.1
8.3±0.1
18.4±0.1
+0.1
ø1.50-0.0
2.0±0.1
32.0±0.3
4.0±0.1
Dimensions of Reel
1.75±0.1
Dimensions of Carrier Tape
33.4±1.0
37.4±1.0
2.0±0.5
Cover Film
240–280
Empty
400–560
Leader
13.0±0.2
The cover film peel strength force: 0.1 to 0.7N
The cover film peel speed: 300mm/min.
Cover Film
18.4±0.1
10°
(in mm)
7
P37E.pdf
!Note • Please read rating and !CAUTION (for storage, operating, rating, soldering, mounting and handling) in this catalog to prevent smoking and/or burning, etc.
• This catalog is for reference only and not an official product specification document, therefore, please review and approve our official product specification before ordering this product.
Piezoelectric Sound Components
RoHS
Piezoelectric Sounders Pin Type
Microcomputers are widely used for microwave
ovens, air conditioners, cars, toys, timers, and
alarm equipment. Externally driven piezoelectric
sounders are used in digital watches, electronic
calculators, telephones and other equipment.
They are driven by a signal (ex.: 2048Hz or 4096Hz)
from an LSI and provide melodious sound.
Features
1.2
3.5
8.6
R1.0
10.0
ø17.0
Terminal of marking
side should be connected
to hot side of D.C.
2-ø1.2
PKM17EPP-2002-B0
11.0
1
Feb. 1,2022
2-ø3.5
Tol.: ±0.5
(in mm)
1. Low power consumption
2. Noiseless and highly reliability
Applications
1. Various office equipment such as PPCs printers and
keyboards
2. Home appliances such as microwave oven, rice cookers
etc.
3. Confirmation sound of various audio equipment
10.8
1.2
R1.0
0.8
10.0
ø22.0
PKM22EPPH2001-B0
10.0
2–ø1.2
2–ø3.5
Tol.: ±0.5
(in mm)
Part Number
PKM22EPPH2001-B0
PKM22EPPH2002-B0
R1.0
0.8 10.0
0°
1.2
10.8
R1.0
10.0
ø22.0
10.0
2-ø1.2
2-ø3.5
Part Number
PKM22EPPH4007-B0
PKM22EPPH4012-B0
Tol.: ±0.5
(in mm)
6.5
3.5
18°
R8.5
2–ø3.5
12
6.5
3.5
PKM22EPPH4007-B0
PKM22EPPH4005-B0
0°
Tol.: ±0.5
(in mm)
12
2–ø3.5
18°
10.0
ø1.2
3–ø1.5
3–ø1.7
5.0 5.0
ø22.0
Part Number
PKM22EPPH4001-B0
PKM22EPPH4002-B0
8
6.5 8.2
3.5
10.0
ø22.0
2–ø1.2
0.8
1.2
7.0
1.2
R1.0
0.8
PKM22EPPH4001-B0
6.5
3.5
Tol.: ±0.5
(in mm)
P37E.pdf
!Note • Please read rating and !CAUTION (for storage, operating, rating, soldering, mounting and handling) in this catalog to prevent smoking and/or burning, etc.
• This catalog is for reference only and not an official product specification document, therefore, please review and approve our official product specification before ordering this product.
Operating
Voltage Range*
(Vo-p)
Sound Pressure Level
(typ.)
Part Number
Capacitance
(nF)
Operating
Temp. Range
(°C)
Feb. 1,2022
Storage
Temp. Range
(°C)
PKM17EPP-2002-B0
79dB [3.0Vo-p,2.0kHz, square wave,10cm]
-20 to +70
-30 to +80
PKM22EPPH2001-B0
79dB [±1.5Vo-p,2.0kHz,square wave,10cm]
±15.0 max.
19.0 ±30%[120Hz]
-20 to +70
-30 to +80
PKM22EPPH4001-B0
87dB [±1.5Vo-p,4.0kHz,square wave,10cm]
±15.0 max.
12.0 ±30%[1kHz]
-20 to +70
-30 to +80
PKM22EPPH4005-B0
86dB [±1.5Vo-p,4.0kHz,square wave,10cm]
±15.0 max.
12.0 ±30%[1kHz]
-20 to +70
-30 to +80
PKM22EPPH4007-B0
92dB [±1.5Vo-p,4.0kHz,square wave,10cm]
±15.0 max.
12.0 ±30%[1kHz]
-20 to +70
-30 to +80
25.0 max. [with polarity] 34.0 ±30%[120Hz]
1
*Operating Voltage Range: Does not contain Direct Current bias.
Frequency Response
PKM22EPPH2001-B0
Conditions: 10cm, A-filter
PKM17EPP-2002-B0
Conditions: 10cm, A-filter
100
100
Square wave, ±1.5Vo-p
90
85
80
75
70
65
60
55
50
Square wave, ±1.5Vo-p
95
Sound Pressure Level (dB)
Sound Pressure Level (dB)
95
90
85
80
75
70
65
60
55
0
1
2
3
4
5
6
Frequency (kHz)
7
8
9
50
10
0
1
2
PKM22EPPH4001-B0
Conditions: 10cm, A-filter
7
8
9
10
100
Square wave, ±1.5Vo-p
95
Square wave, ±1.5Vo-p
95
90
Sound Pressure Level (dB)
Sound Pressure Level (dB)
4
5
6
Frequency (kHz)
PKM22EPPH4005-B0
Conditions: 10cm, A-filter
100
85
80
75
70
65
60
55
50
3
90
85
80
75
70
65
60
55
0
1
2
3
4
5
6
Frequency (kHz)
7
8
9
10
50
0
1
2
3
4
5
6
Frequency (kHz)
7
8
9
10
PKM22EPPH4007-B0
Conditions: 10cm, A-filter
100
Square wave, ±1.5Vo-p
Sound Pressure Level (dB)
95
90
85
80
75
70
65
60
55
50
0
1
2
3
4
5
6
Frequency (kHz)
7
8
9
10
9
P37E.pdf
!Note • Please read rating and !CAUTION (for storage, operating, rating, soldering, mounting and handling) in this catalog to prevent smoking and/or burning, etc.
• This catalog is for reference only and not an official product specification document, therefore, please review and approve our official product specification before ordering this product.
Piezoelectric Sound Components
RoHS
Piezoelectric Sounders Pin Type Taping
0 *
Taking advantage of extensive automatic insertion
design technology and materials experience, Murata
has developed standard taping type piezoelectric
sounders.
This Murata technology supports labor and cost saving
measures.
0.9
9.4
12.6
5.0
22.0
1
2–ø0.45±0.1
Features
2–ø1.0
7.5
1. Lead dimension: Improved mounting reliability
(cut & clinch) due to round terminal
2. High, stable mountability
3. Radial Taping supply
2–ø2.5
Tol.: ±0.5
(in mm)
Part Number
Sound Pressure Level
(typ.)
Operating
Voltage Range*
(Vo-p)
Capacitance
(nF)
Operating
Temp. Range
(°C)
Storage
Temp. Range
(°C)
PKHPS0013E4000-A2
83dB [±1.5Vo-p,4.0kHz,square wave,10cm]
±15.0max.
6.5 ±30%[1kHz]
-40 to +85
-40 to +85
*Operating Voltage Range: Does not contain Direct Current bias.
Frequency Response
PKHPS0013E4000-A2
Conditions: 10cm, A-filter
100
Square wave, ±1.5Vo-p
Sound Pressure Level (dB)
95
90
85
80
75
70
65
60
55
50
10
Feb. 1,2022
0
1
2
3
4
5
6
Frequency (kHz)
7
8
9
10
!Note • Please read rating and !CAUTION (for storage, operating, rating, soldering, mounting and handling) in this catalog to prevent smoking and/or burning, etc.
• This catalog is for reference only and not an official product specification document, therefore, please review and approve our official product specification before ordering this product.
P37E.pdf
Feb. 1,2022
Taping Dimension
dh
D
dh
W
P1
F
H0
W1
W0
L1
W2
d1
H1
A
P2
1
dS
P
D0
t
P0
Item
Code
Nominal Value
Tol.
D
ø12.6
±0.5
Height of component
A
9.4
±0.5
Dimensions of terminal
d1
ø0.45
±0.1
Lead length under the
hold-down tape
L1
6.5 min.
Pitch of component
P
12.7
±1.0
Pitch of sprocket
P0
12.7
±0.2
Length from hole center to lead
P1
3.85
±0.7
Length from hole center to
component center
P2
6.35
±0.7
Lead spacing
F
5.0
±0.5
Slant forward or backward
dh
0
±1.0
Width of carrier tape
W
18.0
±0.5
Width of hold-down tape
W0
12.5 min.
Position of sprocket hole
W1
9.0
Gap of hold-down tape and
carrier tape
W2
2.0 max.
Distance between the center of
sprocket hole and lead stopper
H0
19.5
Total height of component
H1
30.0 max.
Diameter of sprocket hole
D0
ø4.0
±0.2
t
0.6
±0.2
0
±1.0
Width of diameter
Total thickness of tape
Body tilt
dS
Notes
—
—
Tolerance for Pitches 10xP0=127±2mm
360°: 1mm max.
Hold-down tape does not exceed the carrier tape.
±0.5
—
±0.5
—
(in mm)
11
P37E.pdf
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• This catalog is for reference only and not an official product specification document, therefore, please review and approve our official product specification before ordering this product.
Feb. 1,2022
Drive Method
1
Fig. 1 shows examples of the circuit to which the external
drive method is applied.
( i ) Represents a circuit driven by output signals of the
unstable multivibrator.
( ii ) Represents a circuit using 2 NAND gates, which is
oscillated or stopped by ON/OFF operations of the input
signals.
( iii ) Represents a circuit driven by output signals of CMOS
LSI.
+V
510Ω
20kΩ
20kΩ
510Ω
0.01µF
0.01µF
1kΩ
1kΩ
(i)
1MΩ
0.001µF
+V
1kΩ
120kΩ
1kΩ
Input
Signal
( ii )
+V
CMOS LSI
1kΩ
Drive
Circuit
Resonator
LCD
( iii )
Fig. 1 Drive Circuit
12
Buzzer
!Note • Please read rating and !CAUTION (for storage, operating, rating, soldering, mounting and handling) in this catalog to prevent smoking and/or burning, etc.
• This catalog is for reference only and not an official product specification document, therefore, please review and approve our official product specification before ordering this product.
P37E.pdf
Feb. 1,2022
!Caution · Notice
1
!Caution (Rating)
Do not use the product beyond the rated temperature
range and the rated voltage range. If using it beyond this
range, characteristics might degrade.
Notice (Storage and Operating Condition)
1. Product Storage Condition
Please store the products in a room where the
temperature/humidity is stable and avoid places where
there are large temperature changes. Please store the
products under the following conditions.
Temperature: -10 to +40°C
Humidity: 15 to 85%R.H.
2. Expiration Date on Storage
Expiration date (shelf life) of the products is six months
after delivery under the condition of a sealed and
unopened package. Please use the products within six
months after delivery. If you store the products for a long
time (more than six months), use carefully because the
products may be degraded in solderability due to storage
under poor conditions.
Please confirm solderability and characteristics for the
products regularly.
3. Notice on Product Storage
(1) Please do not store the products in a chemical
atmosphere (Acids, Alkali, Bases, Organic gas, Sulfides
and so on), because the characteristics may be reduced
in quality, may be degraded in solderability due to
storage in a chemical atmosphere.
(2) Please do not store the products directly on the floor
without anything under them to avoid damp places
and/or dusty places.
(3) Please do not store the product in places such as in a
damp heated place or any place exposed to direct
sunlight or excessive vibration.
(4) Please use the products immediately after the
package is opened, because the characteristics may be
reduced in quality, and/or be degraded in solderability
due to storage under poor conditions.
(5) Please be sure to consult with our sales representative
or engineer whenever the products are to be used in
conditions not listed above.
4. Operating Environment
This product is designed for application in an ordinary
environment (normal room temperature, humidity and
atmospheric pressure).
Do not use the products in a chemical atmosphere such
as chlorine gas, acid or sulfide gas.
Characteristics might degrade by a chemical reaction
with the material used in products.
Notice (Soldering and Mounting)
(2) Soldering condition by soldering iron for pin terminal
type
· Temperature: within 350±5°C
· Time: within 3.0±0.5 sec.
· Soldering part is the lead terminals excluding 1.5mm
from product body
(3) Reflow soldering condition for surface mounting type
· Temperature profile: Fig. 1
· Number of times: Within 2 maximum
Peak
(260°C max.)
260
230
Temperature (°C)
1. Mounting
When mounting a pin terminal type of product to the
printed circuit board, please insert the pin terminal along
the hole of the board. If the product is pressed so that the
terminal is not in the hole, the pin terminal would be
pushed into the inside of the product and the sounds
might become unstable.
2. Double-sided through-hole Board
Please avoid using a double-sided through-hole board. If
the melted solder touched the base of a pin terminal, a
part of the plastic case would melt and the sounds might
become unstable.
3. Soldering Conditions
(1) Flow soldering conditions for pin terminal type
· Temperature: within 260°C±5°C
· Time: within 10±1 sec.
· Soldering part is the lead terminals excluding 1.5mm
from product body.
Heating
(230°C)
Pre-heating
(150-180°C)
100
Gradual
Cooling
30 sec.
min.
60 to 120 sec.
40 sec.
max.
120 sec.
min.
Fig. 1
Continued on the following page.
13
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• This catalog is for reference only and not an official product specification document, therefore, please review and approve our official product specification before ordering this product.
P37E.pdf
Feb. 1,2022
!Caution · Notice
1
Continued from the preceding page.
4. Washing
Please avoid washing, since this product is not a sealed
structure.
5. After Mounting the Product
(1) If the product is floating from the printed circuit board,
please do not push it. When pressing, the pin terminal is
pushed inside the product and the sounds might
become unstable.
(2) Please do not apply force (shock) to the product. If
force is applied, the case might come off.
(3) If the case comes off, please do not reassemble. Even
if it seems to have returned to the original, the sounds
might become unstable.
(4) Please do not blow air onto the product directly.
Blown air applies force to the piezoelectric diaphragm
through the sound emission hole; cracks could occur
and then the sounds could become unstable. In
addition, there is a possibility that the case could come
off.
6. Flux or Coating Agent, etc., Various Solvents
It is possible for a liquid solvent to penetrate inside the
product, since this product is not a sealed structure. If a
liquid penetrated inside and attached to the piezoelectric
diaphragm, its vibration could be inhibited. If attaching to
an electrical junction, the electric connection might fail.
To prevent sound instability, please do not allow liquid to
penetrate inside the product.
Notice (Handling)
1. Piezoelectric ceramic is used in this product. Please use
care in handling, because ceramic is broken when
excessive force is applied.
2. Please do not apply force to the piezoelectric diaphragm
from the sound emission hole. If applying force, cracks
occur and the sounds might become unstable.
3. Please do not drop the product or apply shock or
temperature change to it. If so, the LSI might be
destroyed by the charge (surge voltage) generated. Fig. 2
shows an example driving circuit using zener diode.
Buzzer
LSI
Fig. 2 Protect Circuit
Notice (Driving)
1. Ag migration might occur if DC voltage is applied to the
product under a high humidity environment. Please avoid
using it under high humidity and design the circuit not to
apply DC voltage.
2. When driving the product by IC, please insert the
resistance of 1k to 2kΩ in series. The purpose is to
protect the IC and to obtain stable sound. (Please see Fig.
2a). Inserting a diode in parallel to the product has the
same effect. (Please see Fig. 3b)
14
R
IC
IC
Fig. 3a
Fig. 3b
P37E.pdf
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• This catalog is for reference only and not an official product specification document, therefore, please review and approve our official product specification before ordering this product.
Piezoelectric Sound Components
Feb. 1,2022
RoHS
Piezoelectric Buzzers
This is a unified piezoelectric sounder that has a
piezoelectric diaphragm of 3 terminals connected to a
self-drive circuit, and it easily generates sound with
only a DC power supply (DC3.0-15V). Using a suitably
designed resonant system, this type can be used where
large sound volumes are needed.
2
4.5±1
0.7±0.3
24.3±0.3
9.7±0.3
R1.0
15.0
Applications
0.6±0.1
1. Gas alarms, burglar alarms
2. Air conditioners, microwave ovens and various types of
microcomputer controlled home electronic appliances
3. Toys, games, and other simple electronic devices
such as teaching aids
Part Number
PKB24SPCH3601-B0
PKB24SPCH3601-B0
Tol.: ±0.5
(in mm)
Sound
Pressure Level
(min.)
Oscillating
Frequency
(kHz)
Current
Consumption
(mA)
Operating
Voltage Range
(Vdc)
Operating
Temp. Range
(°C)
Storage
Temp. Range
(°C)
90dB
[12Vdc,10cm]
3.6 ±0.5kHz
[12Vdc]
16 max.
[12Vdc]
3.0 to 15.0
-20 to +70
-30 to +80
Voltage-Sound Pressure Level/Voltage-Consumption Current
110
100
20
Sound Pressure Level
15
10
90
Consumption Current
5
80
5
10
Input Voltage (Vdc)
15
Consumption Current (mA)
Sound Pressure Level (dB)
25
0
15
!Note • Please read rating and !CAUTION (for storage, operating, rating, soldering, mounting and handling) in this catalog to prevent smoking and/or burning, etc.
• This catalog is for reference only and not an official product specification document, therefore, please review and approve our official product specification before ordering this product.
P37E.pdf
Feb. 1,2022
!Caution · Notice
!Caution (Rating)
Do not use the product beyond the rated temperature
range and the rated voltage range. If using it beyond this
range, characteristics might degrade.
2
Notice (Storage and Operating Condition)
1. Product Storage Condition
Please store the products in a room where the
temperature/humidity is stable and avoid places where
there are large temperature changes. Please store the
products under the following conditions.
Temperature: -10 to +40°C
Humidity: 15 to 85%R.H.
2. Expiration Date on Storage
Expiration date (shelf life) of the products is six months
after delivery under the condition of a sealed and
unopened package. Please use the products within six
months after delivery. If you store the products for a long
time (more than six months), use carefully because the
products may be degraded in solderability due to storage
under poor conditions.
Please confirm solderability and characteristics for the
products regularly.
3. Notice on Product Storage
(1) Please do not store the products in a chemical
atmosphere (Acids, Alkali, Bases, Organic gas, Sulfides
and so on), because the characteristics may be reduced
in quality, may be degraded in solderability due to
storage in a chemical atmosphere.
(2) Please do not store the products directly on the floor
without anything under them to avoid damp places
and/or dusty places.
(3) Please do not store the product in places such as in a
damp heated place or any place exposed to direct
sunlight or excessive vibration.
(4) Please use the products immediately after the
package is opened, because the characteristics may be
reduced in quality, and/or be degraded in solderability
due to storage under poor conditions.
(5) Please be sure to consult with our sales representative
or engineer whenever the products are to be used in
conditions not listed above.
4. Operating Environment
This product is designed for application in an ordinary
environment (normal room temperature, humidity and
atmospheric pressure).
Do not use the products in a chemical atmosphere such
as chlorine gas, acid or sulfide gas.
Characteristics might degrade by a chemical reaction
with the material used in products.
Notice (Soldering and Mounting)
1. Mounting
When mounting a pin terminal type of product to the
printed circuit board, please insert the pin terminal along
the hole of the board. If the product is pressed so that the
terminal is not in the hole, the pin terminal would be
pushed into the inside of the product and the sounds
might become unstable.
2. Double-sided through-hole Board
Please avoid using a double-sided through-hole board. If
the melted solder touched the base of a pin terminal, a
part of the plastic case would melt and the sounds might
become unstable.
3. Soldering Conditions
(1) Flow soldering conditions for pin terminal type
· Temperature: within +260°C±5°C
· Time: within 10±1 sec.
· Soldering part is the lead terminals excluding 1.5mm
from product body.
(2) Soldering condition by soldering iron for pin terminal
type
· Temperature: within 350±5°C
· Time: within 3.0±0.5 sec.
· Soldering part is the lead terminals excluding 1.5mm
from product body.
4. Washing
Please avoid washing, since this product is not a sealed
structure.
5. After Mounting the Product
(1) If the product is floating from the printed circuit board,
please do not push it. When pressing, the pin terminal is
pushed inside the product and the sounds might
become unstable.
(2) Please do not apply force (shock) to the product. If
force is applied, the case might come off.
(3) If the case comes off, please do not reassemble. Even
if it seems to have returned to the original, the sounds
might become unstable.
(4) Please do not blow air onto the product directly.
Blown air applies force to the piezoelectric diaphragm
through the sound emission hole; cracks could occur
and then the sounds could become unstable.
Continued on the following page.
16
!Note • Please read rating and !CAUTION (for storage, operating, rating, soldering, mounting and handling) in this catalog to prevent smoking and/or burning, etc.
• This catalog is for reference only and not an official product specification document, therefore, please review and approve our official product specification before ordering this product.
P37E.pdf
Feb. 1,2022
!Caution · Notice
Continued from the preceding page.
6. Flux or Coating Agent, etc., Various Solvents
It is possible for a liquid solvent to penetrate inside the
product, since this product is not a sealed structure. If a
liquid penetrated inside and attached to the piezoelectric
diaphragm, its vibration could be inhibited. If attaching to
an electrical junction, the electric connection might fail.
To prevent sound instability, please do not allow liquid to
penetrate inside the product.
2
Notice (Handling)
1. Piezoelectric ceramic is used in this product. Please use
care in handling, because ceramic is broken when
excessive force is applied.
2. Please do not apply force to the piezoelectric diaphragm
from the sound emission hole. If applying force, cracks
occur and the sounds might become unstable.
3. Please do not drop the product or apply shock or
temperature change to it. If so, the LSI might be
destroyed by the charge (surge voltage) generated.
Buzzer
LSI
Fig. 1 Protect Circuit
Notice (Driving)
1. When using a piezoelectric buzzer, there is no need to
prepare the oscillation circuit; it has an oscillation circuit.
2. Please set the sounding time more than 200 msec., when
driving the piezoelectric sounder of self-drive or the
piezoelectric buzzer as an intermittent sound.
3. Please don’t block the sound emission hole with tape to
control the sound volume. The oscillation circuit condition
is set so as to obtain a stable sounding (oscillating) state
under the condition that the front of sound emission hole
is in an open state. If the sound emission hole is blocked
with tape, then the oscillation condition changes and the
sounds might become unstable.
4. Please don’t put a resistor between the oscillation circuit
and power supply to control the sound volume of the
piezoelectric sounder or the piezoelectric buzzer. Doing so
could cause an unstable sounding state like an abnormal
oscillation or the oscillation stopping because of the
change in oscillation conditions. Please insert a capacitor
(about 1µF) in parallel with the piezoelectric buzzer, if you
need to control the sound volume. (Please see Fig. 2)
5. Please keep a distance of more than 15mm between the
surface of sound emission hole and the surface of
housing, when mounting the piezoelectric sounder of
self-drive or the piezoelectric buzzer into your set. A
shorter distance could cause an unstable sounding state
like an abnormal oscillation or the oscillation stopping;
because the oscillation conditions change, the acoustics
are influenced by reflection.
+Vdc
Buzzer
Capacitor
(1µF)
Fig. 2
17
P37E.pdf
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• This catalog is for reference only and not an official product specification document, therefore, please review and approve our official product specification before ordering this product.
Piezoelectric Sound Components
Feb. 1,2022
RoHS
Piezoelectric Diaphragms
Features
1. Clear sound
2. Ultra thin and lightweight
3. No contacts; therefore, noiseless and highly reliable
4. Low power consumption for voltage type
øD øa
Black
Applications
3
Red
øb
t
T
Clocks/Calculators/Digital camera/Various alarms
(Burglar alarms, etc.)
* Murata's piezoelectric diaphragms for sound generation
are specialized for functions that generate confirmation
tones and other sounds. They cannot be used for other
functions.
External Drive Type
Part Number
18
Resonant
Frequency
(kHz)
Resonant Capacitance Plate Size Element Size Electrode Size Thickness Plate Thickness
øD
øa
øb
T
t
Impedance
(nF)
(mm)
(mm)
(mm)
(mm)
(mm)
(Ω)
Plate Material
7BB-12-9
9.0 ±1.0kHz 1000 max.
8.0 ±30%
[1kHz]
12.0
9.0
8.0
0.22
0.10
Brass
7BB-15-6
6.0 ±1.0kHz 800 max.
10.0 ±30%
[1kHz]
15.0
10.0
9.0
0.22
0.10
Brass
7BB-20-3
3.6 ±0.6kHz 500 max.
20.0 ±30%
[1kHz]
20.0
14.0
12.8
0.22
0.10
Brass
7BB-20-6
6.3 ±0.6kHz 350 max.
10.0 ±30%
[1kHz]
20.0
14.0
12.8
0.42
0.20
Brass
7BB-20-6L0 6.3 ±0.6kHz 1000 max.
10.0 ±30%
[1kHz]
20.0
14.0
12.8
0.42
0.20
Brass
(with Lead Wire:
AWG32 Length 50mm)
7BB-27-4
4.6 ±0.5kHz 200 max.
20.0 ±30%
[1kHz]
27.0
19.7
18.2
0.54
0.30
Brass
7BB-27-4L0 4.6 ±0.5kHz 300 max.
20.0 ±30%
[1kHz]
27.0
19.7
18.2
0.54
0.30
Brass
(with Lead Wire:
AWG32 Length 50mm)
7BB-35-3
2.8 ±0.5kHz 200 max.
30.0 ±30%
[1kHz]
35.0
25.0
23.0
0.53
0.30
Brass
7BB-35-3L0 2.8 ±0.5kHz 200 max.
30.0 ±30%
[1kHz]
35.0
25.0
23.0
0.53
0.30
Brass
(with Lead Wire:
AWG32 Length 50mm)
7BB-41-2
2.2 ±0.3kHz 250 max.
30.0 ±30%
[1kHz]
41.0
25.0
23.0
0.63
0.40
Brass
7BB-41-2L0 2.2 ±0.3kHz 300 max.
30.0 ±30%
[1kHz]
41.0
25.0
23.0
0.63
0.40
Brass
(with Lead Wire:
AWG32 Length 50mm)
7NB-31R2-1 1.3 ±0.5kHz 300 max.
40.0 ±30%
[120Hz]
31.2
19.7
18.2
0.22
0.10
Nickel Alloy
P37E.pdf
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• This catalog is for reference only and not an official product specification document, therefore, please review and approve our official product specification before ordering this product.
Feb. 1,2022
Design Procedure · Drive Method
Design Procedure
d
R
2a
V
fcav =
h
In general, man’s audible frequency range is about 20Hz to
20kHz.
Frequency ranges of 2kHz to 4kHz are most easily heard.
For this reason, most piezoelectric sound components are
used in this frequency range and the resonant frequency (fo)
is generally selected in the same range.
In general, the piezoelectric diaphragm is installed in a
cavity to produce high sound pressure (Fig 1).
The resonant frequency (fcav) of the cavity in Fig. 1 is
obtained from Formula (1) (Helmholtz’s Formula).
Since the piezoelectric diaphragm and cavity have proper
resonant frequencies, (fo) and (fcav) respectively, sound
pressure in specific frequencies can be increased and a
specific bandwidth can be provided by controlling both
positions.
a2
=
V (R+1.3a)
C
2
4a 2
····················· (1)
d 2h (R+1.3a)
C
2
fcav : Resonant freq. of a cavity (Hz)
c : Speed of sound (cm/sec)
Ref) approx. 347 x 102cm/sec at 25°C
a : Radius of sound emitting hole (cm)
d : Diameter of a supporting rim (cm)
h : Depth of a cavity (cm)
R: Wall thickness of a cavity (cm)
3
Fig. 1 Sectional View of a Cavity
Drive Method
This method produces sound by driving the piezoelectric
diaphragm with electric signals supplied from an external
oscillating circuit such as a multivibrator.
Using this method, the piezoelectric buzzer can work as a
speaker. In this method, a mechanical oscillation Qm of the
piezoelectric diaphragm is damped properly to provide a
wider frequency band of the sound pressure. This is applied
to the switching sounds of home electric appliances, key-in
sounds of OA equipment, because it can provide multiple
sounds, not just a single sound. Fig. 3 shows examples of the
circuit to which the external drive method is applied:
( i ) represents a circuit driven by output signals of the
unstable multivibrator; ( ii ) represents a circuit using 2
NAND gates, which is oscillated or stopped by ON/OFF
operations of the input signal; ( iii ) represents a circuit
driven by output signals of CMOS LSI.
External
Drive Circuit
Fig. 2 Drive Procedure
+V
510Ω
20kΩ
20kΩ
510Ω
0.01µF
0.01µF
1kΩ
1kΩ
(i)
+V
CMOS LSI
1kΩ
1MΩ
0.001µF
120kΩ
+V
Buzzer
Drive
Circuit
1kΩ
1kΩ
Resonator
Input
Signal
( ii )
LCD
( iii )
Fig. 3 Examples of the External Drive Circuit
19
!Note • Please read rating and !CAUTION (for storage, operating, rating, soldering, mounting and handling) in this catalog to prevent smoking and/or burning, etc.
• This catalog is for reference only and not an official product specification document, therefore, please review and approve our official product specification before ordering this product.
P37E.pdf
Feb. 1,2022
!Caution · Notice
!Caution (Rating)
Do not use the product beyond the rated temperature
range. If using it beyond this range, characteristics might
degrade.
The rated voltage range is not specified; depending on the
driving condition or the mounting method, the rated voltage
range is different. In your evaluation, please use actual
operating voltage.
Notice (Storage and Operating Condition)
3
1. Product Storage Condition
Please store the products in a room where the
temperature/humidity is stable and avoid places where
there are large temperature changes. Please store the
products under the following conditions.
Temperature: -10 to +40°C
Humidity: 15 to 85%R.H.
2. Expiration Date on Storage
Expiration date (shelf life) of the products is six months
after delivery under the condition of a sealed and
unopened package. Please use the products within six
months after delivery. If you store the products for a long
time (more than six months), use carefully because the
products may be degraded in solderability due to storage
under poor conditions.
Please confirm solderability and characteristics for the
products regularly.
3. Notice on Product Storage
(1) Please do not store the products in a chemical
atmosphere (Acids, Alkali, Bases, Organic gas, Sulfides
and so on), because the characteristics may be reduced
in quality, may be degraded in solderability due to
storage in a chemical atmosphere.
(2) Please do not store the products directly on the floor
without anything under them to avoid damp places
and/or dusty places.
(3) Please do not store the product in places such as in a
damp heated place or any place exposed to direct
sunlight or excessive vibration.
(4) Please use the products immediately after the
package is opened, because the characteristics may be
reduced in quality, and/or be degraded in solderability
due to storage under poor conditions.
(5) Please be sure to consult with our sales representative
or engineer whenever the products are to be used in
conditions not listed above.
4. Operating Environment
This product is designed for application in an ordinary
environment (normal room temperature, humidity and
atmospheric pressure).
Do not use the products in a chemical atmosphere such
as chlorine gas, acid or sulfide gas.
Characteristics might degrade by a chemical reaction
with the material used in products.
Notice (Soldering and Mounting)
1. Mounting
When mounting the product on your set, pressing force
should be applied to only the supporting part. When force
is applied to the non-supporting part, cracks might occur,
causing unstable sounds.
2. Soldering
(1) Please consult with a Murata representative if you
need to solder the lead wires to the product. We can
deliver the products with soldered lead wires.
When soldering, it is recommended to solder by heating
the product (from 60 to 80°C, more than 10 sec).
Including the presence or absence of heating, please
use after a thorough evaluation about soldering.
Soldering condition is as follows.
· Metal Plate
Temperature of soldering iron: from 410 to 450°C
Soldering Time: within 3 sec.
· Ag electrode
Temperature of soldering iron: from 320 to 350°C
Soldering Time: within 0.5 sec.
· Solder: Sn-Ag-Cu (Flux-cored solder)
(2) Soldering condition of the lead wire to printed circuit
board by using soldering iron.
· Temperature: 350±5°C
· Time: within 3.0±0.5 sec.
Continued on the following page.
20
!Note • Please read rating and !CAUTION (for storage, operating, rating, soldering, mounting and handling) in this catalog to prevent smoking and/or burning, etc.
• This catalog is for reference only and not an official product specification document, therefore, please review and approve our official product specification before ordering this product.
P37E.pdf
Feb. 1,2022
!Caution · Notice
Continued from the preceding page.
Notice (Handling)
1. Piezoelectric ceramic is used in this product. Please use
care in handling, because the ceramic is broken when
excessive force is applied.
2. To avoid rusting, please do not touch the products with
bare hands.
3. Please do not pull the lead wire of the product. Pulling
may cause the lead wire to disconnect or to peel off the
solder point.
4. When attaching a connector to the lead wires, please do
not apply force to the soldering part. After attaching a
connector, we recommend checking the connecting
status.
5. Please do not bend the product or apply any force to it.
Also, please do not press it with sharp objects. Applying
force could cause cracks to occur in the piezoelectric
ceramic, resulting in unstable sounds.
6. Please do not drop the product or apply shock or
temperature change to it. If so, the LSI might be
destroyed by the charge (surge voltage) generated. Fig.1
shows an example driving circuit using zener diode.
Buzzer
LSI
Fig. 1 Protect Circuit
3
Notice (Driving)
1. Ag migration might occur if DC voltage is applied to the
product under a high humidity environment. Please avoid
using it under high humidity and design the circuit not to
apply DC voltage.
2. When driving the product by IC, please insert the
resistance of 1k to 2kΩ in series. The purpose is to
protect the IC and to obtain stable sound. (Please see Fig.
2a). Inserting a diode in parallel to the product has the
same effect. (Please see Fig. 2b).
R
IC
IC
Fig. 2a
Fig. 2b
21
!Note • Please read rating and !CAUTION (for storage, operating, rating, soldering, mounting and handling) in this catalog to prevent smoking and/or burning, etc.
• This catalog is for reference only and not an official product specification document, therefore, please review and approve our official product specification before ordering this product.
P37E.pdf
Feb. 1,2022
Oscillating System
Basically, the sound source of a piezoelectric sound
component is a piezoelectric diaphragm. A piezoelectric
diaphragm consists of a piezoelectric ceramic plate that has
electrodes on both sides and a metal plate (brass or
stainless steel, etc.).
A piezoelectric ceramic plate is attached to a metal plate
with adhesives. Fig. 2 shows the oscillating system of a
piezoelectric diaphragm.
Applying DC voltage between electrodes of a piezoelectric
diaphragm causes mechanical distortion due to the
piezoelectric effect. For a misshapen piezoelectric element,
the distortion of the piezoelectric element expands in a
radial direction, and the piezoelectric diaphragm bends
toward the direction shown in Fig. 2 (a). The metal plate
bonded to the piezoelectric element does not expand.
Conversely, when the piezoelectric element shrinks, the
piezoelectric diaphragm bends in the direction shown in
Fig. 2 (b). Thus, when AC voltage is applied across
electrodes, the bending shown in Fig. 2 (a) and Fig. 2 (b) is
repeated as shown in Fig. 2 (c), producing sound waves in
the air.
Electrode
Piezoelectric
Ceramics
Electrode
Piezoelectric
Ceramics
Piezoelectric
Element
Piezoelectric
Diaphragm
Metal
Plate
Fig. 1 Structure of Piezoelectric Diaphragm
(a) Extended State
(c) AC Voltage Applied
(b) Shrinked State
Fig. 2 Oscillation System
22
P37E.pdf
!Note • Please read rating and !CAUTION (for storage, operating, rating, soldering, mounting and handling) in this catalog to prevent smoking and/or burning, etc.
• This catalog is for reference only and not an official product specification document, therefore, please review and approve our official product specification before ordering this product.
Feb. 1,2022
To Raise Sound Pressure Level (S.P.L.)
In summary, the following are typical examples of raising
S.P.L.
(1) ( i ), ( ii ), ( iii ) in Fig. 3 (Examples of the External Drive
Circuit) (page 20), input DC voltage for Piezoelectric
sound components should be getting higher.
Variable range of input voltage should be less than
maximum input voltage.
(2) In a case that is driven by IC directly like as Fig. 2, input
voltage of Piezoelectric sound components should be
twice as high because of the BTL (Bridge Tied Load) drive
circuit, which includes an inverter.
Frequency Characteristics of Sound Pressure Level
PKLCS1212E4001-R1
±6.0Vo-p
±3.0Vo-p
±1.5Vo-p
100
Sound Pressure Level (dB)
It is probable that the S.P.L. of Piezoelectric sound
components is higher when the input voltage is higher
because Piezoelectric sound components are driven by
voltage. The SPL when the input voltage being converted
from V1 to V2 can be calculated from the following formula.
SPL at V2 = SPL at V1 + 20log (V2/V1)
V1: previous input voltage
V2: increased input voltage
Therefore, S.P.L. is theoretically getting 6dB higher as the
input voltage is twice as high.
Fig. 1 represents S.P.L. - frequency characteristics for
PKLCS1212E4001-R1 in which the input voltage is varied.
We can see that S.P.L. is approximately getting 6dB higher
as the input voltage is twice as high.
90
80
70
60
50
0
1
2
3
Frequency (kHz)
4
5
6
Distance: 10cm
Wave form: Square Wave
Fig. 1 Frequency Characteristics of Sound Pressure Level
Fig. 2 Example of BTL Drive Circuit
by 1-port Output IC for Buzzer
23
!Note • Please read rating and !CAUTION (for storage, operating, rating, soldering, mounting and handling) in this catalog to prevent smoking and/or burning, etc.
• This catalog is for reference only and not an official product specification document, therefore, please review and approve our official product specification before ordering this product.
P37E.pdf
Feb. 1,2022
Measuring Method
Measuring Procedure
Measurement of Resonant Frequency and Resonant
Impedance
Measuring
Terminal
When the piezoelectric diaphragm oscillates freely in air,
the node does not move as shown in Fig. 1. With this point
held with a measuring terminal, the resonant frequency (f0)
and resonant impedance (R0) are measured in the
constant-current circuit as shown in Fig. 2.
Measuring Procedure
1) Connect the switch to side "a" and adjust frequency of
the oscillator to read the frequency and the voltage when
the voltmeter indicates a minimum value.
2) Next connect the switch to side "b" and vary the variable
resistor to have the same voltage as in 1). Then, read the
value of the resistor.
3) The resonant frequency (f0) can be obtained from 1) and
the resonant impedance (R0) from 2).
Note: Actual measurement is performed using a measuring
unit in accordance with the above principles.
Node
Supporting Method
Fig. 1 Measurement of Piezoelectric Diaphragm
Oscillator
(1Vrms max.)
Frequency
Counter
S.P.L.(dB) [under actual operating conditions]
= S.P.L.(dB) [value specified in catalog]
+20 log (B/A) ··········································(2)
In case of relation with distance:
A = Actual distance
B = Distance specified in catalog
In case of relation with voltage:
A = Voltage specified in catalog
B = Actual operating voltage
24
a
b
Switch
Variable
Resistor
Piezoelectric
Diaphragm
Measurement of Sound Pressure Level (S.P.L.)
The sound pressure level is measured with a sound pressure
level meter as shown in Fig. 3.
Note: The relation between sound pressure level and
distance between sound pressure level and voltage can
be expressed with Formula (2). The value of the sound
pressure level under different operating conditions can be
easily calculated using values specified in the catalog.
Voltmeter
R1 (10kΩ Around)
Fig. 2 Measurement Set-Up of Resonant Freq.
and Resonant Impedance
Piezoelectric Sounder
(Self-Drive)
Oscillation
Circuit
Measuring
Distance
Sound Pressure
Level Meter
Fig. 3 Measurement Set-Up of S.P.L.
Frequency
Counter
!Note • Please read rating and !CAUTION (for storage, operating, rating, soldering, mounting and handling) in this catalog to prevent smoking and/or burning, etc.
• This catalog is for reference only and not an official product specification document, therefore, please review and approve our official product specification before ordering this product.
P37E.pdf
Feb. 1,2022
Minimum Quantity
Product Names
o Piezoelectric Sounders
Part Number
Minimum Quantity (pcs.)
Ø330mm Reel
PKLCS1212E2000-R1
1000
PKLCS1212E20A0-R1
1000
PKLCS1212E2400-R1
1000
PKLCS1212E24A0-R1
1000
PKLCS1212E4001-R1
1000
PKLCS1212E40A1-R1
1000
PKMCS0909E4000-R1
2000
PKMCS0909E48H0-R1
1250
PKMCS1818E20A0-R1
250
Bulk (Box)
PKHPS0013E4000-A2
500
PKM17EPP-2002-B0
1000
PKM22EPPH2001-B0
750
PKM22EPPH2002-B0
750
PKM22EPPH4001-B0
900
PKM22EPPH4002-B0
900
PKM22EPPH4005-B0
750
PKM22EPPH4007-B0
750
PKM22EPPH4012-B0
750
o Piezoelectric Buzzers
PKB24SPCH3601-B0
650
o Piezoelectric Diaphragms
7BB-12-9
5120
7BB-15-6
8000
7BB-20-3
3000
7BB-20-6
1800
7BB-20-6L0
7BB-27-4
Ammo Pack
600
1500
7BB-27-4L0
600
7BB-35-3
800
7BB-35-3L0
400
7BB-41-2
400
7BB-41-2L0
250
7NB-31R2-1
3000
25
P37E.pdf
Feb. 1,2022
Cat. No. P37E-30
Global Locations
For details please visit www.murata.com
Note
1 Export Control
For customers outside Japan:
Murata requests customers to ensure that no
Murata products are used or sold, through any
channels, for use in the design, development,
production, utilization, maintenance or operation
of, or otherwise contribution to Weapons of
Mass Destruction (nuclear, chemical or biological
weapons or missiles), conventional weapons, or
items specially designed for them.
2 Please contact our sales representatives or
product engineers before using the products in
this catalog for the applications listed below,
which require especially high reliability for the
prevention of defects which might directly
damage a third party’s life, body or property, or
when one of our products is intended for use
in applications other than those specified in
this catalog.
1
Aircraft equipment
Aerospace equipment
For customers in Japan:
2
For products which are controlled items subject
to the “Foreign Exchange and Foreign Trade Law”
of Japan, the export license specified by the law
is required for export.
3
Undersea equipment
4
Power plant equipment
5
Medical equipment
6
Transportation equipment (vehicles, trains,
ships, etc.)
7
Traffic signal equipment
8
Disaster prevention / crime prevention
equipment
9
Data-processing equipment
10
Application of similar complexity and/or
reliability requirements to the applications
listed above
Murata Manufacturing Co., Ltd.
www.murata.com
3 Product specifications in this catalog are as of
February 2022. They are subject to change or
our products in it may be discontinued without
advance notice. Please check with our sales
representatives or product engineers before
ordering. If there are any questions, please contact
our sales representatives or product engineers.
4 Please read rating and CAUTION (for storage,
operating, rating, soldering, mounting and
handling) in this catalog to prevent smoking
and/or burning, etc.
5 This catalog has only typical specifications.
Therefore, please approve our product
specifications or transact the approval sheet
for product specifications before ordering.
6 Please note that unless otherwise specified, we
shall assume no responsibility whatsoever for any
conflict or dispute that may occur in connection
with the effect of our and/or a third party’s
intellectual property rights and other related
rights in consideration of your use of our products
and/or information described or contained in our
catalogs. In this connection, no representation
shall be made to the effect that any third parties
are authorized to use the rights mentioned above
under licenses without our consent.
7 No ozone depleting substances (ODS) under the
Montreal Protocol are used in our manufacturing
process.
