MAXIMUM RATINGS AND CHARACTERISTICS
Rating at 25℃ ambient temperature unless otherwise specified.
Parameters
SYMBOL VALUE
UNITS
ZENER Current I
Z
MAX See table
mA
Power Dissipation ( Note1 )Ta=70℃ Pt 3.0
W
Thermal Resistances ( Junction to Ambient ,Note1) Rθ（ja） 28
℃/W
Operating Temperature Range
T
J
-50～+150
℃
Storage Temperature Range
T
STG
-50～+175
℃
NOTES :
1. Thermal Resistance from Junction to terminal mounted on 5×5mm copper pad area.
FEATURES：
◆ ZENER impedance at low current is small
◆ High reliability
◆ High temperature soldering guaranteed:
250℃ / 10S / 9.5mm lead length at 5 lbs tension
MECHANICAL DATA：
◆ Case: Molded plastic
◆ Epoxy: UL94V-0 rate flame retardant
◆ Polarity: Color band denotes cathode
◆ Mounting position: Any
1.5WATT SURFACE MOUNTSILICON ZENER DIODES
Dimensions in inches and (millimeters)
SMB / DO-214AA
4.4±0.15
2.0±0.1
3.5
±
0.15
5.2±0.15
1.1±0.3
0.22±0.07
2.3
±
0.2
1SMB5921B-1SMB5956B
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ELECTRICAL CHARACTERISTICS ( at T
A
=25℃ unless otherwise noted )
TYPE
NUMBER
(Note 2)
Nominal
ZENER
Voltage
Test
Current
Max ZENER Impedance
Maximum
Reverse Leakage
Current
Maximum
DC ZENER
Current
of V
(BR)
V
Z
＠
I
ZT
I
ZT
Z
ZT
＠
I
ZT
( Note 3 )
Z
ZK
＠
I
ZK
( Note 4 )
I
ZK
I
R
＠
V
R
V
R
I
ZM
＠
50℃
(Note 5 )
V mA
Ω Ω mA μA V mA
1SMB5921B 6.8 55.1 2.5 200 1.0 5.0 5.2 220
1SMB5922B 7.5 50.0 3.0 400 0.5 5.0 6.8 200
1SMB5923B 8.2 45.7 3.5 400 0.5 5.0 6.5 182
1SMB5924B 9.1 41.2 4.0 500 0.5 5.0 7.0 164
1SMB5925B 10 37.5 4.5 500 0.25 5.0 8.0 150
1SMB5926B 11 34.1 5.5 550 0.25 1.0 8.4 136
1SMB5927B 12 31.2 6.5 550 0.25 1.0 9.1 125
1SMB5928B 13 28.8 7.0 550 0.25 1.0 9.9 115
1SMB5929B 15 25.0 9.0 600 0.25 1.0 11.4 100
1SMB5930B 16 23.4 10.0 600 0.25 1.0 12.2 93
1SMB5931B 18 20.8 12.0 650 0.25 1.0 13.7 83
1SMB5932B 20 18.7 14.0 650 0.25 1.0 15.2 75
1SMB5933B 22 17.0 17.5 650 0.25 1.0 16.7 68
1SMB5934B 24 15.6 19 700 0.25 1.0 18.2 62
1SMB5935B 27 13.9 23 700 0.25 1.0 20.6 55
1SMB5936B 30 12.5 26 750 0.25 1.0 22.8 50
1SMB5937B 33 11.4 33 800 0.25 1.0 25.1 45
1SMB5938B 36 10.4 38 850 0.25 1.0 27.4 41
1SMB5939B 39 9.6 45 900 0.25 1.0 29.7 38
1SMB5940B 43 8.7 53 950 0.25 1.0 32.7 34
1SMB5941B 47 8.0 67 1000 0.25 1.0 35.8 31
1SMB5942B 51 7.3 70 1100 0.25 1.0 38.8 29
1SMB5943B 56 6.7 86 1300 0.25 1.0 42.6 26
1SMB5944B 62 6.0 100 1500 0.25 1.0 47.1 24
1SMB5945B 68 5.5 120 1700 0.25 1.0 51.7 22
1SMB5946B 75 5.0 140 2000 0.25 1.0 56.0 20
1SMB5947B 82 4.6 160 2500 0.25 1.0 62.2 18
1SMB5948B 91 4.1 200 3000 0.25 1.0 69.2 16
1SMB5949B 100 3.7 250 3100 0.25 1.0 76.0 15
1SMB5950B 110 3.4 300 4000 0.25 1.0 83.6 13
1SMB5951B 120 3.1 380 4500 0.25 1.0 91.2 12
1SMB5952B 130 2.9 450 5000 0.25 1.0 98.8 11
1SMB5953B 150 2.5 600 6000 0.25 1.0 114.0 10
1SMB5954B 160 2.3 700 6500 0.25 1.0 121.6 9
1SMB5955B 180 2.1 900 7000 0.25 1.0 136.8 8
1SMB5956B 200 1.9 1200 8000 0.25 1.0 152.0 7
Note :
1. VF=1.5V max. @ IF=200mA
2. TOLERANCE DESIGNATION Standard tolerance on nominal ZENER voltage is ±5%,
3. ZENER IMPEDANCE I ( ac rms ) = 10% Izt
4. ZENER KNEE IMPEDANCE I (ac rms ) = 10% Izk
5. MAXIMUM ZENER CURRENT The nominal Izm currents shown are applicable for devices having regulator voltages approximately
10% above the nominal Vz values shown. These values do not represent absolute limits. The actual steady state current-voltage
product must not exceed the power rating.
1SMB5921B-1SMB5956B
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