1N957...1N978
SILICON PLANAR ZENER DIODES
Standard Zener voltage tolerance is ± 20%. Add suffix
"A" for ± 10% tolerance and suffix "B" for ± 5%
tolerance. Other tolerances, non standard and higher
Zener voltages are upon request.
Max. 1.9
Black
Cathode Band
Black
Part No.
Black
"ST" Brand
Max. 0.5
Min. 27.5
XXX
ST
Max. 3.9
Min. 27.5
Glass Case DO-35
Dimensions in mm
Absolute Maximum Ratings (T
a
= 25
O
C)
Parameter
Power Dissipation
Junction Temperature
Storage Temperature Range
1)
Symbol
P
tot
T
j
T
S
Value
500
1)
Unit
mW
O
175
- 65 to + 175
C
C
O
Valid provided that leads are kept at ambient temperature at a distance of 8 mm from case
Characteristics at T
a
= 25
O
C
Parameter
Thermal Resistance Junction to Ambient Air
Forward Voltage
at I
F
= 200 mA
1)
Symbol
R
thA
V
F
Max.
0.3
1)
1.5
Unit
K/mW
V
Valid provided that leads are kept at ambient temperature at a distance of 8 mm from case.
SEMTECH ELECTRONICS LTD.
®
(Subsidiary
of Sino-Tech International Holdings Limited, a company
listed on the Hong Kong Stock Exchange, Stock Code: 724)
Dated : 13/06/2007
1N957...1N978
Characteristics at T
a
= 25
O
C
Zener Voltage
Range
1)
Type
V
Znom
V
1N957
1N958
1N959
1N960
1N961
1N962
1N963
1N964
1N965
1N966
1N967
1N968
1N969
1N970
1N971
1N972
1N973
1N974
1N975
1N976
1N977
1N978
1)
2)
Maximum Dynamic resistance
r
zjT
Ω
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
zjk
Ω
700
700
700
700
700
700
700
700
700
700
750
750
750
750
750
1000
1000
1000
1000
1500
1500
1500
at I
ZK
mA
1
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
Maximum Reverse Leakage Current
2)
Test-Voltage (V
R
)
I
R
µA
150
75
50
25
10
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
Suffix A
V
4.9
5.4
5.9
6.6
7.2
8
8.6
9.4
10.8
11.5
13
14.4
15.8
17.3
19.4
21.6
23.8
25.9
28.1
31
33.8
36.7
Suffix B
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
l
ZT
mA
18.5
16.5
15
14
12.5
11.5
10.5
9.5
8.5
7.8
7
6.2
5.6
5.2
4.6
4.2
3.8
3.4
3.2
3
2.7
2.5
Maximum
Regulator
Current
I
ZM
(mA)
47
42
38
35
32
28
26
24
21
19
17
15
14
13
11
10
9
8.5
7.8
7
6.4
5.9
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
Tested with pulses tp = 20 ms
Valid provided that leads are kept at ambient temperature at a distance of 8 mm from case.
500
Power Dissipation: Ptot (mW)
400
300
200
100
0
0
25
100
150
Ambient Temperature: Ta (
O
C)
200
Power Derating Curve
SEMTECH ELECTRONICS LTD.
®
(Subsidiary
of Sino-Tech International Holdings Limited, a company
listed on the Hong Kong Stock Exchange, Stock Code: 724)
Dated : 13/06/2007
Embedded System
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