CE
CHENYI ELECTRONICS
FEATURES
. Silicon planar power zener diodes
. Standards zener voltage tolerance is 20%.Add suffix "A" for
tolerance and suffix "B" for 5% tolerance other tolerance, non
standards and higher zener voltage upon request
10%
1N957 THRU 1N978
0.5W SILICON PLANAR ZENER DIODES
MECHANICAL DATA
.
Case:
DO-35 glass case
.
Polarity:
Color band denotes cathode end
.
Weight:
Approx. 0.13gram
ABSOLUTE MAXIMUM RATINGS(LIMITING VALUES)(T
A
=25
)
Symbols
Zener current see table "Characteristics"
Power dissipation at T
A
=75
Junction temperature
Storage temperature range
P
tot
T
J
T
STG
Value
Units
500
1)
175
-65 to + 175
mW
1)Valid provided that at a distance of 8mm from case are kept at ambient temperature(DO-35)
ELECTRICAL CHARACTERISTICS(TA=25
)
Symbols
Thermal resistance junction to ambient
Forward voltage
at I
F
=200mA
R
JA
Min.
Typ.
Max.
300
1)
1.5
Units
/W
V
F
1)Valid provided that leads at a distance of 8mm from case are kept at ambient temperature
Copyright @ 2000 SHANGHAI CHENYI ELECTRONICS CO.,LTD
Page 1 of 2
CE
CHENYI ELECTRONICS
1N957 THRU 1N978
0.5W SILICON PLANAR ZENER DIODES
1N957…1N978 SILICON PLANAR ZENER DIODES
Maximum
Zener Voltage Range
3)
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
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
I
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
5
11.5
13
16
17
21
25
29
33
41
49
58
70
80
93
105
125
1500
1000
750
0.25
700
0.5
5.5
4.5
Z
ZT
zener
impedence
1)
Z
ZK
I
ZK
mA
1
Typical
Tempetature
coefficient
I
R 2)
A
150
75
50
10
5
Maximum Reverse
Leakage Current
Test-Voltage
suffix A
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
Maximum
Regulator
Current
I
ZM 2)
mA
47
42
38
35
32
28
26
24
21
19
17
15
14
14
11
10
9.0
8.5
7.8
7.0
6.4
5.9
%/
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
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
5
19.4
21.6
23.8
25.9
28.1
31
33.8
36.7
Notes:
(1)The Zener impedance is derived from the 1kHz Ac voltage which results when an AC current having an RMS value equal to 10%
of the Zener current (I
ZT
) is suprimposed on I
ZT
Zener impedance is measured at two points to insure a sharp knee on the
breakdown curve and to eliminate unstable units.
(2)Valid provided that leads are kept at ambient temperature at a distance of 8mm from case
(3) Measured with device junction in thermal equilibrium.
Copyright @ 2000 SHANGHAI CHENYI ELECTRONICS CO.,LTD
Page 2 of 2
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