©2004 Fairchild Semiconductor Corporation 1N957B - 1N991B, Rev. E2
Zener
s

1N
9
57B -
1N991
B
Electrical Characteristics T
A
=25°C unless otherwise noted
Device
V
Z
(Volts) (Note 1) Z
Z
(Ω) (Note 2) I
R
@ V
R
I
ZM
(mA)
(Note 3)
Min. Typ. Max.
@ I
Z
(mA)
Z
Z
@ I
Z
Z
ZK
@ I
ZK
µAVolts
Ω mA
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
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
17.1
19
20.9
22.8
25.652
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
1N976B
8.5
31.35
34.2
37.05
40.85
30
33
36
39
43
31.5
34.65
37.8
40.95
45.15
4.2
3.8
3.4
3.2
3.0
49
58
70
80
93
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
32.7
10
9.2
8.5
7.8
7.0
1N977B
1N978B
1N979B
1N980B
1N981B
44.65
48.45
53.2
58.9
64.6
47
51
56
62
68
49.35
53.55
58.8
65.1
71.4
2.7
2.5
2.2
2.0
1.8
105
125
150
185
230
1500
1500
2000
2000
2000
0.25
0.25
0.25
0.25
0.25
5
5
5
5
5
35.8
38.8
42.6
47.1
51.7
6.4
5.9
5.4
4.9
4.5
Zeners
1N957B - 1N991B
Absolute Maximum Ratings * T
A
= 25°C unless otherwise noted
* These ratings are limiting values above which the serviceability of the diode may be impaired.
Symbol Parameter Value Units
P
D
Power Dissipation
@ TL ≤ 75°C, Lead Length = 3/8”
500 mW
Derate above 75°C4.0/°C
T
J
, T
STG
Operating and Storage Temperature Range -65 to +200 °C
Tolerance = 5%
DO-35 Glass case
COLOR BAND DENOTES CATHODE