CNEL 1N978, 1N977, 1N976, 1N974, 1N975 Datasheet
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CE 1N957 THRU 1N978
CHENYI ELECTRONICS 0.5W SILICON PLANAR ZENER DIODES
FEATURES
. Silicon planar power zener diodes
. Standards zener voltage tolerance is 20%.Add suffix "A" for 10%
tolerance and suffix "B" for 5% tolerance other tolerance, non
standards and higher zener voltage upon request
MECHANICAL DATA
. Case: DO-35 glass case
. Polarity: Color band denotes cathode end
. Weight: Approx. 0.13gram
ABSOLUTE MAXIMUM RATINGS(LIMITING VALUES)(TA=25
Symbols Units
Zener current see table "Characteristics"
Power dissipation at T
Junction temperature T
Storage temperature range TSTG
1)Valid provided that at a distance of 8mm from case are kept at ambient temperature(DO-35)
A=75 Ptot mW
J
Value
500
-65 to + 175
ELECTRICAL CHARACTERISTICS(TA=25 )
Symbols Min. Typ. Max. Units
Thermal resistance junction to ambient R
Forward voltage at I
1)Valid provided that leads at a distance of 8mm from case are kept at ambient temperature
F=200mA VF 1.5
JA 300 1) /W
)
1)
175
Copyright @ 2000 SHANGHAI CHENYI ELECTRONICS CO.,LTD
Page 1 of 2
CE 1N957 THRU 1N978
CHENYI ELECTRONICS 0.5W SILICON PLANAR ZENER DIODES
1N957…1N978 SILICON PLANAR ZENER DIODES
Zener Voltage Range
Type
ZNOM IZT ZZT ZZK IZK suffix A suffix B IZM 2)
V
V mA mA %/ A V V mA
1N957 6.8
1N958 7.5
1N959 8.2
1N960 9.1
1N961 10
1N962 11
1N963 12
1N964 13
1N965 15
1N966 16
1N967 18
1N968 20
1N969 22
1N970 24
1N971 27
1N972 30
1N973 33
1N974 36
1N975 39
1N976 43
1N977 47
1N978 51
Maximum Typical
3)
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
4.5 1 0.050
5.5
5 0.076
11.5 0.077
13 0.079
16 0.082
17 0.083
21 0.085
25 0.086
29 0.087
33 0.088
41 0.090
49 0.091
58 0.092
70 0.093
80 0.094
93 0.095
105 0.095
125 0.096
zener Tempetature
impedence
1) coefficient Current
0.5
700
750
1000
1500
0.25
0.058
0.062
0.068
0.075
Maximum Reverse
Leakage Current
IR 2)
150 4.9
75 5.4
50 5.9
10 6.6
5
5
Test-Voltage
7.2
8
8.6
9.4
10.8
11.5
13
14.4
15.8
17.3
19.4 20.6
21.6 22.8
23.8 25.1
25.9 27.4
28.1 29.7
31 32.7
33.8 35.8
36.7 38.8
Maximum
Regulator
5.2 47
5.7 42
6.2 38
6.9 35
7.6 32
8.4 28
9.1 26
9.9 24
11.4 21
12.2 19
13.7 17
15.2 15
16.7 14
18.2 14
11
10
9.0
8.5
7.8
7.0
6.4
5.9
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
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.
ZT) is suprimposed on IZT Zener impedance is measured at two points to insure a sharp knee on the
Copyright @ 2000 SHANGHAI CHENYI ELECTRONICS CO.,LTD
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