1N957 THRU 1N978
SILICON PLANAR ZENER DIODES
Features
Silicon Planar Zener Diodes
20%. Add suffix A
Standard Zener voltage tolerance is
for
10% tolerance and suffix B for
5% tolerance.
Other tolerances, non standard and higher Zener voltages
upon request.
DIM ENSIONS
DIM
A
B
C
D
inches
Min.
-
-
-
1.083
Max.
0.154
0.075
0.020
-
Min.
-
-
-
27.50
mm
Max.
3.9
1.9
0.52
-
Note
Absolute Maximum Ratings
(T
a
=25
)
Symbols
Values
Units
Zener current see Table "Characteristics"
Power dissipation at T
amb
=50
Junction temperature
Storage temperature range
P
tot
T
j
T
S
400
1)
mW
175
-65 to +175
Note:
(1) Valid provided that leads are kept at ambient temperature at a distance of 8 mm from case.
Characteristics
Thermal resistance
junction to ambient Air
at
T
amb
=25
Symbols
Min.
Typ.
Max.
Units
R
thA
V
F
-
-
-
-
0.3
1)
K/mW
V
Forward voltage at I
F
=200mA
1.5
Note:
(1) Valid provided that leads are kept at ambient temperature at a distance of 8 mm from case.
1
Zener voltage range
Type
1)
Dynamic resistance
Typical
temperature
coefficient
Maximum reverse leakage currrent
Maximum
regulator
current
I
ZM
mA
47
42
38
35
32
28
26
24
21
19
17
15
14
13
11
10
9.0
8.5
7.8
7.0
6.4
5.9
V
znom
V
I
ZT
mA
18.5
16.5
15
14
12.5
11.5
10.5
9.5
8.5
7.8
7.0
6.2
5.6
5.2
4.6
4.2
3.8
3.4
3.2
3.0
2.7
2.5
4.5
5.5
6.5
7.5
8.5
9.5
11.5
13
16
17
21
25
29
33
41
49
58
70
80
93
105
125
r
zjT
and r
zjk
at I
zk
mA
700
700
700
700
700
700
700
700
700
700
750
750
750
750
750
1000
1000
1000
1000
1500
1500
1500
1.0
0.5
0.5
0.5
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
0.25
0.25
0.25
(%/
)
I
R
2)
Test - Voltage
Suffix A
Suffix B
V
4.9
5.4
5.9
6.6
7.2
8.0
8.6
9.4
10.8
11.5
13.0
14.4
15.8
17.3
19.4
21.6
23.8
25.9
28.1
31.0
33.8
36.7
V
5.2
5.7
6.2
6.9
7.6
8.4
9.1
9.9
11.4
12.2
13.7
15.2
16.7
18.2
20.6
22.8
25.1
27.4
29.7
32.7
35.8
38.8
uA
150
75
50
25
10
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
1N957
1N958
1N959
1N960
1N961
1N962
1N963
1N964
1N965
1N966
1N967
1N968
1N969
1N970
1N971
1N972
1N973
1N974
1N975
1N976
1N977
1N978
6.8
7.5
8.2
9.1
10
11
12
13
15
16
18
20
22
24
27
30
33
36
39
43
47
51
0.050
0.058
0.062
0.068
0.075
0.076
0.077
0.079
0.082
0.083
0.085
0.086
0.087
0.088
0.090
0.091
0.092
0.093
0.094
0.095
0.095
0.096
Notes:
(1) Test with pulse tp=20ms.
(2) Valid provided that leads are kept at ambient temperature at a distance of 8 mm from case.
2
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