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CE
CHENYI ELECTRONICS
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
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)(TA=25 )
Zener current see table "Characteristics"
Symbols
Value
Power dissipation at TA=75
Ptot 5001)
Junction temperature
TJ 175
Storage temperature range
TSTG
-65 to + 175
1)Valid provided that at a distance of 8mm from case are kept at ambient temperature(DO-35)
ELECTRICAL CHARACTERISTICS(TA=25 )
Units
mW
Symbols Min.
Thermal resistance junction to ambient
R JA
Forward voltage at IF=200mA
VF
1)Valid provided that leads at a distance of 8mm from case are kept at ambient temperature
Typ.
Max. 300 1)
1.5
Units /W
Copyright @ 2000 SHANGHAI CHENYI ELECTRONICS CO.,LTD
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CE
CHENYI ELECTRONICS
1N957 THRU 1N978
0.5W SILICON PLANAR ZENER DIODES
1N957…1N978 SILICON PLANAR ZENER DIODES
Type
1N957 1N958 1N959 1N960 1N961 1N962 1N963 1N964 1N965 1N966 1N967 1N968 1N969 1N970 1N971 1N972 1N973 1N974 1N975 1N976 1N977 1N978
Zener Voltage Range3)
VZNOM V 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
IZT 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 zener
impedence1) ZZT ZZK
4.5
5.5
700 5 11.5 13 16 17 21 25 29 750 33 41 49 58
1000 70 80 93 105 1500 125
IZK mA 1 0.5
0.25
Typical Tempetature
coefficient
%/ 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
Maximum Reverse
Leakage Current
IR 2) Test-Voltage suffix A suffix B
AVV 150 4.9 5.2 75 5.4 5.7 50 5.9 6.2 10 6.6 6.9
7.2 7.6 5
8 8.4 8.6 9.1 9.4 9.9 10.8 11.4 11.5 12.2 13 13.7 14.4 15.2 15.8 16.7 17.3 18.2 5 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 Current
IZM 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
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 (IZT) is suprimposed on IZT 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
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