1N957B Series
ELECTRICAL CHARACTERISTICS (T = 25°C unless
A
I
otherwise noted, V = 1.5 V Max @ I = 200 mA for all types)
F
F
I
F
Symbol
Parameter
V
Z
Reverse Zener Voltage @ I
ZT
I
ZT
Reverse Current
Z
I
Maximum Zener Impedance @ I
Reverse Current
ZT
ZT
V
Z
V
R
V
I
ZT
ZK
V
F
R
I
Z
ZK
Maximum Zener Impedance @ I
ZK
I
Reverse Leakage Current @ V
Breakdown Voltage
R
R
V
R
I
F
Forward Current
V
Forward Voltage @ I
F
F
Zener Voltage Regulator
I
Maximum DC Zener Current
ZM
ELECTRICAL CHARACTERISTICS (T = 25°C unless otherwise noted, V = 1.5 V Max @ I = 200 mA for all types)
A
F
F
Zener Voltage (Note 3.)
Zener Impedance (Note 4.)
Leakage Current
@ V
I
ZM
V (Volts)
Z
@ I
Z
ZT
@ I
Z
ZK
@ I
I
R
(Note 5.)
ZT
ZT
ZK
R
Device
Device
Min
Nom
Max
mA
W
W
mA
µA
Volts
mA
(Note 2.)
Marking
1N957B
1N958B
1N959B
1N960B
1N961B
1N957B
1N958B
1N959B
1N960B
1N961B
6.46
7.125
7.79
8.645
9.5
6.8
7.5
8.2
9.1
10
7.14
7.875
8.61
9.555
10.5
18.5
16.5
15
14
12.5
4.5
5.5
6.5
7.5
8.5
700
700
700
700
700
1.0
0.5
0.5
0.5
0.25
150
75
50
25
10
5.2
5.7
6.2
6.9
7.6
47
42
38
35
32
1N962B
1N963B
1N964B
1N965B
1N966B
1N962B
1N963B
1N964B
1N965B
1N966B
10.45
11.4
12.35
14.25
15.2
11
12
13
15
16
11.55
12.6
13.65
15.75
16.8
11.5
10.5
9.5
8.5
7.8
9.5
11.5
13
16
17
700
700
700
700
700
0.25
0.25
0.25
0.25
0.25
5
5
5
5
5
8.4
9.1
9.9
11.4
12.2
28
26
24
21
19
1N967B
1N968B
1N969B
1N970B
1N971B
1N967B
1N968B
1N969B
1N970B
1N971B
17.1
19
20.9
22.8
25.65
18
20
22
24
27
18.9
21
23.1
25.2
28.35
7.0
6.2
5.6
5.2
4.6
21
25
29
33
41
750
750
750
750
750
0.25
0.25
0.25
0.25
0.25
5
5
5
5
5
13.7
15.2
16.7
18.2
20.6
17
15
14
13
11
1N972B
1N973B
1N974B
1N975B
1N978B
1N972B
1N973B
1N974B
1N975B
1N978B
28.5
31.35
34.2
37.05
48.45
30
33
36
39
51
31.5
34.65
37.8
40.95
53.55
4.2
3.8
3.4
3.2
2.5
49
58
70
80
125
1000
1000
1000
1000
1500
0.25
0.25
0.25
0.25
0.25
5
5
5
5
5
22.8
25.1
27.4
29.7
38.8
10
9.2
8.5
7.8
5.9
1N979B
1N982B
1N979B
1N982B
53.2
56
75
58.8
2.2
1.7
150
270
2000
2000
0.25
0.25
5
5
42.6
56
5.4
4.1
71.25
78.75
2. TOLERANCE AND VOLTAGE DESIGNATION
Tolerance designation – Device tolerance of ±5% is indicated by a “B” suffix.
3. ZENER VOLTAGE (V ) MEASUREMENT
Z
Nominal zener voltage is measured with the device junction in the thermal equilibrium at the lead temperature (T ) at 30°C ± 1°C and 3/8″
L
lead length.
4. ZENER IMPEDANCE (Z ) DERIVATION
Z
Z
ZT
and Z are measured by dividing the ac voltage drop across the device by the ac current applied. The specified limits are for I
=
Z(ac)
ZK
0.1 I
with the ac frequency = 60 Hz.
Z(dc)
5. MAXIMUM ZENER CURRENT RATINGS (I
)
ZM
Values shown are based on the JEDEC rating of 400 mW where the actual zener voltage (V ) is known at the operating point, the maximum
Z
zener current may be increased and is limited by the derating curve.
http://onsemi.com
2