1N5221B through 1N5281B Series
ELECTRICAL CHARACTERISTICS (TA
= 25ºC unless
otherwise noted. Based on DC measurements at thermal
equilibrium; lead length = 3/8”; thermal resistance of heat sink =
30°C/W, VF = 1.1 V Max @ IF = 200mA for all types)
Symbol
Parameter
VZ
IZT
ZZT
IZk
IR
Reverse Zener Voltage @ IZT
Reverse Zener Current
Maximum Zener Impedance @ IZT
Reverse Zener Current
Reverse Leakage Current @ VR
Reverse Voltage
VR
IF
Forward Current
VF
θVZ
Forward Voltage @ IF
Maximum Zener Voltage Temperature Coefficient
ELECTRICAL CHARACTERISTICS (TA = 25ºC unless otherwise noted, VF = 1.1 V Max @ IF = 200mA for all types)
(Note 3.)
(Note 4.)
Zener Voltage
VZ (Volts)
Nom
Zener Impedance
ZZT @ IZT ZZK @ IZK
Ω)
Leakage Current
IR @ VR
θVZ
@ IZT
(mA)
(Note 5.)
(%/ºC)
Device
Device
Min
Max
(mA)
(Volts)
Marking
(
(Ω)
(µA)
(Note 2.)
1N5221B
1N5222B
1N5223B
1N5224B
1N5225B
1N5221B
1N5222B
1N5223B
1N5224B
1N5225B
2.28
2.375
2.565
2.66
2.4
2.5
2.7
2.8
3
2.52
2.625
2.835
2.94
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
30
30
30
30
29
28
24
23
22
19
17
11
7
1200
1250
1300
1400
1600
1600
1700
1900
2000
1900
1600
1600
1600
1000
750
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
100
100
75
75
50
25
15
10
5
1
1
-0.085
-0.085
-0.08
1
1
-0.08
2.85
3.15
1
-0.075
-0.07
1N5226B 1N5226B
1N5227B 1N5227B
1N5228B 1N5228B
3.135
3.42
3.3
3.6
3.9
4.3
4.7
5.1
5.6
6
3.465
3.78
1
1
-0.065
-0.06
3.705
4.085
4.465
4.845
5.32
4.095
4.515
4.935
5.355
5.88
1
1N5229B
1N5230B
1N5229B
1N5230B
1
±0.055
±0.03
±0.03
+0.038
+0.038
+0.045
+0.05
5
2
1N5231B 1N5231B
1N5232B 1N5232B
5
2
5
3
1N5233B
1N5233B
5.7
6.3
5
3.5
4
1N5234B 1N5234B
1N5235B 1N5235B
5.89
6.2
6.8
6.51
7
5
6.46
7.14
5
3
5
2. TOLERANCE AND TYPE NUMBER DESIGNATION (VZ)
The type numbers listed have a standard tolerance on the nominal zener voltage of ±5%.
3. ZENER VOLTAGE (VZ) MEASUREMENT
Nominal zener voltage is measured with the device junction in the thermal equilibrium at the lead temperature (TL) at 30°C
±1°C and 3/8” lead length.
4. ZENER IMPEDANCE (ZZ) DERIVATION
ZZT and ZZK are measured by dividing the AC voltage drop across the device by the AC current applied. The specified limits
are for IZ(AC) = 0.1 IZ(DC) with AC frequency = 60Hz.
5. TEMPERATURE COEFFICIENT (θVZ
)
Test conditions for temperature coefficient are as follows:
A. IZT = 7.5mA, T1 = 25°C, T2 = 125°C (1N5221B through 1N5242B)
B. IZT = Rated IZT, T1 = 25°C, T2 = 125°C (1N5243B through 1N5281B)
Device to be temperature stabilized with current applied prior to reading breakdown voltage at the specified ambient
temperature.
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