1N957

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)(TA=25 ) Symbols Zener current see table "Characteristics" Power dissipation at TA=75 Junction temperature Storage temperature range Ptot TJ TSTG Value Units 5001) 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 IF=200mA R JA Min. Typ. Max. 300 1) 1.5 Units /W VF 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 Range3) Type VZNOM 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 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 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 ZZT zener impedence1) ZZK IZK mA 1 Typical Tempetature coefficient IR 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 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 %/ 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 (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 Page 2 of 2