Reference Only
Spec No. JELF243B-0006R-01
P.1/9
CHIP COIL (CHIP INDUCTORS) LQM21FN□□□□00□ REFERENCE SPECIFICATION
1. Scope
This reference specification applies to LQM21FN_00 series, Chip coil (Chip Inductors).
2. Part Numbering
(ex)
LQ
M
21
F
N
1R0
N
0
0
D
Product ID Structure Dimension Applications Category Inductance Tolerance Features Electrode
(L×W) and
Characteristics
*B: Bulk packing also available
Packaging
D: Taping
(Paper tape)
L: Taping
(Plastic tape)
*B: BULK
3. Rating
・Operating Temperature Range
・Storage Temperature Range
Customer
Part Number
– 40°C to + 85°C
– 55°C to +125°C
MURATA
Part Number
Inductance
(μH)
Tolerance
DC
Resistance
(Ω)
Self
Resonant
Frequency
(MHz min.)
Rated
Current
(mA)
LQM21FN1R0N00D
1.0
0.20±30%
105
220
LQM21FN2R2N00D
2.2
0.28±30%
70
150
LQM21FN4R7N00L
4.7
LQM21FN100N00L
10
LQM21FN220N00L
LQM21FN470N00L
0.30±30%
25
80
0.50±30%
15
60
22
0.35±30%
15
13
47
0.60±30%
7.5
7
±30%
4. Appearance and Dimensions
0.5±0.3
Ferrite
Electrode
T
2.0±0.2
1.25±0.2
(in mm)
Dimension of T
Unit Mass
(Typical value)
Inductance: 1.0μH to 2.2μH
0.85mm±0.2mm
Inductance: 4.7μH to 47μH
1.25mm±0.2mm
Inductance: 1.0μH to 2.2μH
0.010g
Inductance: 4.7μH to 47μH
0.016g
5. Testing Conditions
《Unless otherwise specified》
《In case of doubt》
Temperature : Ordinary Temperature / 15°C to 35°C
Temperature : 20°C ± 2°C
: Ordinary Humidity
/ 25%(RH) to 85%(RH)
Humidity
: 60%(RH) to 70%(RH)
Humidity
Atmospheric Pressure : 86kPa to 106kPa
MURATA MFG.CO., LTD
Reference Only
Spec No. JELF243B-0006R-01
P.2/9
6. Electrical Performance
No.
6.1
Item
Inductance
Specification
Inductance shall meet item 3.
6.2
DC Resistance
DC Resistance shall meet item 3.
Test Method
Measuring Equipment:
KEYSIGHT 4291A or equivalent (1mA)
Measuring Frequency: 1MHz
Measuring Equipment: Digital multi meter
Digital multi meter
(TR6846 or equivalent)
a
terminal1
SW
b
terminal2
DC resistance shall be measured after
putting chip coil between the terminal 2
under the condition of opening between
a and b.
Every measurement the terminal 1 shall
be shorted between a and b when
changing chip coil.
6.3
6.4
Self Resonant
Frequency (S.R.F)
Rated Current
S.R.F shall meet item 3.
Self temperature rise shall be limited
to 25°C max.
Inductance Change: within ±50%
Measuring Equipment:
KEYSIGHT 4195A or equivalent (1mA)
The rated current is applied.
7. Mechanical Performance
No.
7.1
Item
Shear Test
Specification
Chip coil shall not be damaged after
tested as follows.
Test Method
Applied Direction
Chip Coil
F
Substrate
7.2
Bending Test
Force: 10N
Hold Duration: 5s±1s
Applied Direction: Parallel to PCB
Substrate: Glass-epoxy substrate
(100mm×40mm×1.6mm)
Pressure jig
R340
F
Deflection
45
7.3
Vibration
45
Product (in mm)
Speed of Applying Force: 1mm / s
Deflection: 1mm
Hold Duration: 30s
Oscillation Frequency:
10Hz to 55Hz to 10Hz for 1 minute
Total Amplitude: 1.5mm
Testing Time:
A period of 2h in each of 3 mutually
perpendicular directions.
MURATA MFG.CO., LTD
Reference Only
Spec No. JELF243B-0006R-01
P.3/9
No.
7.4
Item
Solderability
Specification
The wetting area of the electrode
shall be at least 90% covered with
new solder coating.
7.5
Resistance to
Soldering Heat
Appearance: No damage
Inductance Change: within ±20%
Test Method
Flux: Ethanol solution of rosin 25(wt)%
(Immersed for 5s to 10s)
Solder: Sn-3.0Ag-0.5Cu
Pre-Heating: 150°C±10°C / 60s to 90s
Solder Temperature: 240°C±5°C
Immersion Time: 3s±1s
Flux: Ethanol solution of rosin 25(wt)%
(Immersed for 5s to 10s)
Solder: Sn-3.0Ag-0.5Cu
Pre-Heating: 150°C±10°C / 60s to 90s
Solder Temperature: 270°C±5°C
Immersion Time: 10s±1s
Then measured after exposure in the room
condition for 24h±2h.
8. Environmental Performance
It shall be soldered on the substrate.
No.
Item
Specification
8.1 Heat Resistance
Appearance: No damage
Inductance Change: within ±20%
8.2
Humidity
8.3
Temperature
Cycle
Test Method
Temperature: 85°C±2°C
Time: 1000h (+48h,-0h)
Then measured after exposure in the room
condition for 24h±2h.
Temperature: 40°C±2°C
Humidity: 90%(RH) to 95%(RH)
Time: 1000h (+48h, -0h)
Then measured after exposure in the room
condition for 24h±2h.
1 cycle:
1 step: -40°C±2°C / 30 min±3 min
2 step: Ordinary temp. / 10 min to 15 min
3 step: 85°C±2°C / 30 min to 3 min
4 step: Ordinary temp. / 10 min to15 min
Total of 10 cycles
Then measured after exposure in the room
condition for 24 h±2 h.
MURATA MFG.CO., LTD
Reference Only
Spec No. JELF243B-0006R-01
P.4/9
9. Specification of Packaging
9.1 Appearance and Dimensions of paper tape / plastic tape
Type
Dimensions (in mm)
8.0±0.3
8mm-wide
Paper tape
2.25 ±0.1
LQM21FN
1R0N00D
2R2N00D
φ1.5± 00.1
3.5±0.05
2.0±0.05
4.0±0.1
4.0±0.1
1.75±0.1
P/N
Direction of feed
1.1 max.
φ 1.5± 00.1
3 .5 ±0 .0 5
8mm-wide
Plastic tape
2 .2 5 ±0 .1
LQM21FN
4R7N00L
100N00L
220N00L
470N00L
4.0±0.1
1.3±0.1
0.2±0.1
8 .0 ±0 .3
2.0±0.05
4.0±0.1
1 .7 5 ±0 .1
1.45±0.1
Direction of feed
1.45±0.1
・Dimension of the Cavity is measured at the bottom side.
9.2 Specification of Taping
(1) Packing quantity (standard quantity)
・Inductance : 1.0μH to 2.2μH (Paper tape)
・Inductance : 4.7μH to 47μH (Plastic tape)
4,000 pcs / reel
3,000 pcs / reel
(2) Packing Method
(Paper tape)
Products shall be packed in the cavity of the base tape continuously and sealed by top tape and
bottom tape.
(Plastic tape)
Products shall be packed in the each embossed cavity of plastic tape and sealed by cover tape.
(3) Sprocket hole
The sprocket holes are to the right as the tape is pulled toward the user.
(4) Spliced point
(Paper tape)
Base tape and Top tape has no spliced point.
(Plastic tape)
Plastic tape and Cover tape has no spliced point.
(5) Missing components number
Missing components number within 0.1% of the number per reel or 1 pc., whichever is greater,
and are not continuous. The Specified quantity per reel is kept.
9.3 Pull Strength
【Case of Paper tape】
Top tape
Bottom tape
5N min.
【Case of Plastic tape】
Plastic tape
Cover tape
MURATA MFG.CO., LTD
10N min.
5N min.
Reference Only
Spec No. JELF243B-0006R-01
P.5/9
9.4 Peeling off force of cover tape
【Case of Paper tape】
【Case of Plastic tape】
Top tape
165 to 180 degree
165 to 180 degree
F
Bottom tape
F
Base tape
Speed of Peeling off
Cover tape
Plastic tape
300mm / min
Paper tape: 0.1N to 0.6N
Plastic tape: 0.2N to 0.7N
(minimum value is typical)
Peeling off force
9.5 Dimensions of Leader-tape, Trailer and Reel
There shall be leader-tape ( top tape / cover tape and empty tape) and trailer-tape (empty tape) as follows.
2.0±0.5
Trailer
160 min.
Leader
Label
190 min.
210 min.
Empty tape
13.0±0.2
Top tape:Paper tape
+1
60 -0
21.0±0.8
9.0 +1
-0
Cover tape:Plastic tape
Direction of feed
13.0±1.4
+0
180 -3
(in mm)
9.6 Marking for reel
Customer part number, MURATA part number, Inspection number (1), RoHS Marking (2), Quantity
etc ・・・
□□ OOOO
1)
(1)
(2)
(3)
(1) Factory Code
(2) Date
First digit
: Year / Last digit of year
Second digit
: Month / Jan. to Sep. 1 to 9, Oct. to Dec. O, N, D
Third, Fourth digit : Day
(3) Serial No.
2)
ROHS – Y (△)
(1) (2)
(1) RoHS regulation conformity parts.
(2) MURATA classification number
9.7 Marking for Outside package (corrugated paper box)
Customer name, Purchasing order number, Customer part number, MURATA part number, RoHS
Marking (2), Quantity, etc ・・・
9.8. Specification of Outer Case
Label
H
D
W
Outer Case Dimensions
(mm)
W
D
H
186
186
93
Standard Reel Quantity
in Outer Case (Reel)
5
Above Outer Case size is typical. It depends on a quantity of an order.
MURATA MFG.CO., LTD
Reference Only
Spec No. JELF243B-0006R-01
P.6/9
10. ! Caution
Limitation of Applications
Please contact us before using our products for the applications listed below which require especially
high reliability for the prevention of defects which might directly cause damage to the third party's life,
body or property.
(1) Aircraft equipment
(6) Transportation equipment (vehicles, trains, ships, etc.)
(2) Aerospace equipment
(7) Traffic signal equipment
(8) Disaster prevention / crime prevention equipment
(3) Undersea equipment
(4) Power plant control equipment (9) Data-processing equipment
(10) Applications of similar complexity and /or reliability
(5) Medical equipment
requirements to the applications listed in the above
11. Notice
This product is designed for solder mounting.
Please consult us in advance for applying other mounting method such as conductive adhesive.
11.1 Land pattern designing
Chip coil
c
a
Solder Resist
b
Land
a
b
c
1.2
3.0 to 4.0
1.0
(in mm)
11.2 Flux, Solder
・ Use rosin-based flux.
Don’t use highly acidic flux with halide content exceeding 0.2(wt)% (chlorine conversion value).
Don’t use water-soluble flux.
・ Use Sn-3.0Ag-0.5Cu solder.
・ Standard thickness of solder paste: 100m to 150m.
11.3 Flow soldering / Reflow soldering conditions
・ Pre-heating should be in such a way that the temperature difference between solder and product
surface is limited to 150°C max. Cooling into solvent after soldering also should be in such a way that
the temperature difference is limited to 100°C max.
Insufficient pre-heating may cause cracks on the product, resulting in the deterioration of products
quality.
・Standard soldering profile and the limit soldering profile is as follows.
The excessive limit soldering conditions may cause leaching of the electrode and/or resulting in the
deterioration of product quality.
Soldering profile
(1) Flow soldering profile
Temp.
(℃)
265℃±3℃
250℃
Limit Profile
150
Heating Time
60s min.
Pre-heating
Heating
Cycle of flow
Standard Profile
Time. (s)
Standard Profile
Limit Profile
150℃, 60s min.
250℃, 4s~6s
265℃±3℃, 5s
2 times
2 times
MURATA MFG.CO., LTD
Reference Only
Spec No. JELF243B-0006R-01
P.7/9
(2) Reflow soldering profile
Temp.
(℃)
260℃
245℃±3℃
220℃
230℃
Limit Profile
180
150
Standard Profile
30s~60s
60s max.
90s±30s
Pre-heating
Heating
Peak temperature
Cycle of reflow
Time. (s)
Standard Profile
Limit Profile
150°C~180°C, 90s±30s
above 220°C, 30s~60s
above 230°C, 60s max.
245°C±3°C
260°C, 10s
2 times
2 times
11.4 Reworking with soldering iron.
The following conditions must be strictly followed when using a soldering iron.
Pre-heating
Tip temperature
Soldering iron output
Tip diameter
Soldering time
Time
150°C, 1 min
350°C max.
80W max.
φ3mm max.
3(+1, -0)s
2 times
Note : Do not directly touch the products with the tip of the soldering iron in order to prevent the
crack on the products due to the thermal shock.
11.5 Solder Volume
・ Solder shall be used not to be exceeded the upper limits as shown below.
・ Accordingly increasing the solder volume, the mechanical stress to Chip is also increased.
Exceeding solder volume may cause the failure of mechanical or electrical performance.
Upper Limit
Recommendable
1/3T≦t≦T
T: thickness of product
t
11.6 Product’s location
The following shall be considered when designing and laying out P.C.B.'s.
(1) P.C.B. shall be designed so that products are not subject to the mechanical stress due to warping the
board.
[Products direction]
a
b
〈 Poor example 〉
〈 Good example〉
Products shall be located in the sideways
direction (Length: ab) to the mechanical
stress.
MURATA MFG.CO., LTD
Reference Only
Spec No. JELF243B-0006R-01
P.8/9
(2)Components location on P.C.B. separation.
It is effective to implement the following measures, to reduce stress in separating the board.
It is best to implement all of the following three measures; however, implement as many measures
as possible to reduce stress.
Contents of Measures
(1) Turn the mounting direction of the component parallel to the board separation surface.
(2) Add slits in the board separation part.
(3) Keep the mounting position of the component away from the board separation surface.
Stress Level
A > D *1
A > B
A > C
C
Perforation
B
D
A
Slit
*1 A > D is valid when stress is added vertically to the perforation as with Hand Separation.
If a Cutting Disc is used, stress will be diagonal to the PCB, therefore A > D is invalid.
(3) Mounting Components Near Screw Holes
When a component is mounted near a screw hole, it may be affected by the board deflection that occurs
during the tightening of the screw. Mount the component in a position as far away from the screw holes
as possible.
Screw Hole
Recommended
11.7 Cleaning Conditions
Products shall be cleaned on the following conditions.
(1) Cleaning temperature shall be limited to 60°C max. (40°C max for IPA.)
(2) Ultrasonic cleaning shall comply with the following conditions with avoiding the resonance
phenomenon at the mounted products and P.C.B.
Power : 20 W / l max.
Frequency : 28kHz to 40kHz
Time : 5 min max.
(3) Cleaner
1. Alcohol type cleaner
Isopropyl alcohol (IPA)
2. Aqueous agent
PINE ALPHA ST-100S
(4) There shall be no residual flux and residual cleaner after cleaning. In the case of using aqueous agent,
products shall be dried completely after rinse with de-ionized water in order to remove the cleaner.
(5) Other cleaning Please contact us.
11.8 Resin coating
The inductance value may change and/or it may affect on the product's performance due to high
cure-stress of resin to be used for coating/molding products. So please pay your careful attention when
you select resin.
In prior to use, please make the reliability evaluation with the product mounted in your application set.
MURATA MFG.CO., LTD
Reference Only
Spec No. JELF243B-0006R-01
P.9/9
11.9 Caution for use
There is possibility that the inductance value change due to magnetism. Don‘t use a magnet or a pair of
tweezers with magnetism when chip coil are handled. (The tip of the tweezers should be molded with resin or
pottery.)
11.10 Magnetic Saturation
When the excessive current over rated current is applied, the inductance value may change due to
magnetism.
11.11 Handling of a substrate
After mounting products on a substrate, do not apply any stress to the product caused by bending or
twisting to the substrate when cropping the substrate, inserting and removing a connector from the
substrate or tightening screw to the substrate.
Excessive mechanical stress may cause cracking in the product.
Bending
Twisting
11.12 Storage and Handing Requirements
(1) Storage period
Use the products within 6 months after delivered.
Solderability should be checked if this period is exceeded.
(2) Storage conditions
・Products should be stored in the warehouse on the following conditions.
Temperature : -10°C to 40°C
: 15% to 85% relative humidity No rapid change on temperature and humidity
Humidity
Don't keep products in corrosive gases such as sulfur,chlorine gas or acid, or it may cause oxidization
of electrode, resulting in poor solderability.
・Products should be stored on the palette for the prevention of the influence from humidity, dust and so
on.
・ Products should be stored in the warehouse without heat shock, vibration, direct sunlight and so on.
・Products should be stored under the airtight packaged condition.
(3) Handling Condition
Care should be taken when transporting or handling product to avoid excessive vibration or mechanical
shock.
12.! Note
(1) Please make sure that your product has been evaluated in view of your specifications with our product
being mounted to your product.
(2) You are requested not to use our product deviating from the reference specifications.
(3) The contents of this reference specification are subject to change without advance notice.
Please approve our product specifications or transact the approval sheet for product specifications
before ordering.
MURATA MFG.CO., LTD