1SMA5921~1SMA5945
SURFACE MOUNT SILICON ZENERDIODE
VOLTAGE
6.8 to 68 Volt
POWER
1.5 Watt
FEATURES
• For surface mounted applications in order to optimize board space
• Glass passivated junction
• Low inductance
• Typical IR less than 1µA above 12V
• Plastic package has Underwriters Laboratory Flammability
Classification 94V-O
• High temperature soldering : 260°C /10 seconds at terminals
• Lead free in compliance with EU RoHS 2.0
• Green molding compound as per IEC 61249 standard
MECHANICAL DATA
• Case: JEDEC DO-214AC, Molded plastic over passivated junction
• Terminals: Solder plated, solderable per MIL-STD-750, Method 2026
• Polarity: Color band denotes cathode end
• Standard Packaging: 12mm tape (EIA-481)
• Weight: 0.0023 ounces, 0.0679 grams
MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS
Ratings at 25°C ambient temperature unless otherwise specified.
Parameter
Pwak Pulse Power Dissipation on T L=75OC (Notes A)
Derate above 75 OC
Peak Forward Surge Current 8.3ms single half sine-wave
superimposed on rated load (Notes B)
Operating Junction and Storage Temperature Range
Symbol
Value
Units
PD
1.5
20
W atts
mW/ OC
IFSM
10
Amps
TJ,TSTG
-55 to + 150
O
C
NOTES :
A.Mounted on 5mm 2 (0.013mm thick) land areas.
B.Measured on 8.3ms, and single half sine-wave or equivalent square wave ,duty cycle=4 pulses per minute maximum.
October 16,2018-REV.05
PAGE . 1
1SMA5921~1SMA5945
Nominal Zener Voltage
Part Number
Max. Reverse
Leakage Current
M a ximum Ze ner I mpedanc e
V Z @ I ZT
Z ZT @ I
Z ZK @ I ZK
ZT
IR
VR
Ma rk ing
Co d e
Nom V
M inV
Ma x V
Ω
mA
Ω
mA
μA
V
1SMA5921
6.8
6.46
7.14
3
55.1
200
1
5
5.2
921A
1SMA5922
7.5
7.13
7.88
3
50
400
0.5
5
6
922A
1SMA5923
8.2
7.79
8.61
4
45.7
400
0.5
5
6.5
923A
1SMA5924
9.1
8.65
9.56
4
41.2
500
0.5
5
7
924A
1SMA5925
10
9.5
10.5
5
37.5
500
0.25
5
8
925A
1SMA5926
11
10.45
11.55
6
34.1
550
0.25
1
8.4
926A
1SMA5927
12
11.4
12.6
7
31.2
550
0.25
1
9.1
927A
1SMA5928
13
12.35
13.65
7
28.8
550
0.25
1
9.9
928A
1SMA5929
15
14.25
15.75
9
25
600
0.25
1
11.4
929A
1SMA5930
16
15.2
16.8
10
23.4
600
0.25
1
12.2
930A
1SMA5931
18
17.1
18.9
12
20.8
650
0.25
1
13.7
931A
1SMA5932
20
19
21
14
18.7
650
0.25
1
15.2
932A
1SMA5933
22
20.9
23.1
18
17
650
0.25
1
16.7
933A
1SMA5934
24
22.8
25.2
19
15.6
700
0.25
1
18.2
934A
1SMA5935
27
25.65
28.35
23
13.9
700
0.25
1
20.6
935A
1SMA5936
30
28.5
31.5
26
12.5
750
0.25
1
22.8
936A
1SMA5937
33
31.35
34.65
33
11.4
800
0.25
1
25.1
937A
1SMA5938
36
34.2
37.8
38
10.4
850
0.25
1
27.4
938A
1SMA5939
39
37.05
40.95
45
9.6
900
0.25
1
29.7
939A
1SMA5940
43
40.85
45.15
53
8.7
950
0.25
1
32.7
940A
1SMA5941
47
44.65
49.35
67
8
1000
0.25
1
35.8
941A
1SMA5942
51
48.45
53.55
70
7.3
1100
0.25
1
38.8
942A
1SMA5943
56
53.2
58.8
86
6.7
1300
0.25
1
42.6
943A
1SMA5944
62
58.9
65.1
100
6
1500
0.25
1
47.1
944A
1SMA5945
68
64.6
71.4
120
5.5
1700
0.25
1
51.7
945A
October 16,2018-REV.05
PAGE . 2
2.5
2
1.5
1
0.5
0
0
20
40
60
80
100
120 140 150 180
qvz, TEMPERATURE COEFICENT (mV/ OC)
MAXIMUM POWER DISSIPATION, Watts
1SMA5921~1SMA5945
10
V @I
Z ZT
8
6
4
2
0
-2
-4
2
200
V @I
Z ZT
70
50
30
20
10
20
30
50
70
10
12
Fig.2 Zener Voltage - to 12 volts
100
200
Zz, DYNAMIC IMPEDANCE (OHMS)
qvz, TEMPERATURE COEFICENT (mV/ OC)
Fig.1 Steady State Power Derating
10
8
V , ZENER VOLTAGE (VOLTS)
Z
O
LEAD TEMPERATURE, C
100
6
4
1K
500
VZ=150V
200
100
50
T = 25 O C
J
I (rms) =0.1 I (dc)
Z
Z
62V
20
10
5
22V
12V
2
1
0.5
Vz, ZENER VOLTAGE (VOLTS)
6.8V
1
5
2
10
20
50
100 200
500
Iz, ZENER TEST CURRENT (mA)
Fig.3 Zener Voltage - 14 to 200 Volts
Fig.4 Effect of Zener Current
I Z (dc)=1mA
100
70
50
30
20
10mA
10
7
5
3
2
I Z (rms)=0.1I Z (dc)
20mA
5
7
10
20 3 0
40
50 60
70
Vz, ZENER VOLTAGE (VOLTS)
Fig.5 Effect of Zener Voltage
October 16,2018-REV.05
100
Ppk, PEAKSURGE POWER (WATTS)
Zz, DYNAMIC IMPEDANCE (OHMS)
1K
200
RECTANGULAR
NONREPETITIVE
WAVEFORM
O
T J =25 C PRIOR
TO INTIAL PULSE
500
300
200
100
50
30
20
10
0.1 0.20.3 0.5
1
2 3
5
10 20 30 50
100
PW, PULSE WIDTH (ms)
Fig.6 Maximum Surge Power
PAGE . 3
1SMA5921~1SMA5945
100
Iz, ZENER CURRENT (mA)
Iz, ZENER CURRENT (mA)
100
50
30
20
10
5
3
2
1
0.5
0.3
0.2
0.1
0
1
2
3
4
5
6
7
8
Vz, ZENER VOLTAGE (VOLTS)
Fig.7 Vz = 6.8 thru 10 Volts
9
10
50
30
20
10
5
3
2
1
0.5
0.3
0.2
0.1
0
10
20
30
40
50
60
70
80
90 100
Vz, ZENER VOLTAGE (VOLTS)
Fig.8 Vz = 12 thru 82 Volts
NOTE 3. ZENER VOLTAGE (Vz) MEASUREMENT
Nominal zener voltage is measured with the device function in thermal equilibrium with ambient
O
temperature at 25 C
NOTE 4. ZENER IMPEDANCE (Zz) DERIVATION
Zzt and Zzk are measured by dividing the ac voltage drop across the device by the accurrent applied.
The specified limits are for Iz(ac) = 0.1 Iz, (dc) with the ac freqency = 60Hz
October 16,2018-REV.05
PAGE . 4
1SMA5921~1SMA5945
MOUNTING PAD LAYOUT
ORDER INFORMATION
• Packing information
T/R - 7.5K per 13" plastic Reel
T/R - 1.8K per 7" plastic Reel
October 16,2018-REV.05
PAGE . 5
1SMA5921~1SMA5945
Part No_packing code_Version
1SMA5921_R1_00001
1SMA5921_R2_00001
For example :
RB500V-40_R2_00001
Serial number
Version code means HF
Part No.
Packing size code means 13"
Packing type means T/R
Packing Code XX
Packing type
Tape and Ammunition Box
(T/B)
Tape and Reel
(T/R)
Bulk Packing
(B/P)
Tube Packing
(T/P)
Tape and Reel (Right Oriented)
(TRR)
Tape and Reel (Left Oriented)
(TRL)
FORMING
October 16,2018-REV.05
Version Code XXXXX
1st Code
Packing size code
A
N/A
0
HF
0
serial number
R
7"
1
RoHS
1
serial number
B
13"
2
T
26mm
X
S
52mm
Y
L
F
PANASERT T/B CATHODE UP
(PBCU)
PANASERT T/B CATHODE DOWN
(PBCD)
2nd Code HF or RoHS 1st Code 2nd~5th Code
U
D
PAGE . 6
1SMA5921~1SMA5945
Disclaimer
• Reproducing and modifying information of the document is prohibited without permission
from Panjit International Inc..
• Panjit International Inc. reserves the rights to make changes of the content herein the
document anytime without notification. Please refer to our website for the latest
document.
• Panjit International Inc. disclaims any and all liability arising out of the application or use of
any product including damages incidentally and consequentially occurred.
• Panjit International Inc. does not assume any and all implied warranties, including warranties
of fitness for particular purpose, non-infringement and merchantability.
• Applications shown on the herein document are examples of standard use and operation.
Customers are responsible in comprehending the suitable use in particular applications.
Panjit International Inc. makes no representation or warranty that such applications will be
suitable for the specified use without further testing or modification.
•
The products shown herein are not designed and authorized for equipments requiring high
level of reliability or relating to human life and for any applications concerning life-saving
or life-sustaining, such as medical instruments, transportation equipment, aerospace
machinery et cetera. Customers using or selling these products for use in such applications
do so at their own risk and agree to fully indemnify Panjit International Inc. for any damages
resulting from such improper use or sale.
• Since Panjit uses lot number as the tracking base, please provide the lot number for tracking
when complaining.
October 16,2018-REV.05
PAGE . 7
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