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 Value Units Power dissipation at TA=75 Ptot 5001) mW Junction temperature TJ 175 TSTG -65 to + 175 Zener current see table "Characteristics" Storage temperature range 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 Min. Typ. JA VF Max. Units 300 1) /W 1.5 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 1N957 THRU 1N978 CHENYI ELECTRONICS 0.5W SILICON PLANAR ZENER DIODES 1N957…1N978 SILICON PLANAR ZENER DIODES Maximum Typical Maximum Reverse Maximum zener Tempetature Leakage Current Regulator impedence1) coefficient Zener Voltage Range3) Type VZNOM V 1N957 1N958 IZT ZZT ZZK mA 6.8 18.5 7.5 16.5 IZK mA 4.5 IR 2) 1 0.5 Test-Voltage Current suffix A suffix B IZM 2) A V V mA 0.050 150 4.9 5.2 47 0.058 75 5.4 5.7 42 0.062 50 5.9 6.2 38 0.068 10 6.6 6.9 35 7.2 7.6 32 8 8.4 28 %/ 1N959 8.2 15 1N960 9.1 14 1N961 10 12.5 1N962 11 11.5 5 0.076 1N963 12 10.5 11.5 0.077 8.6 9.1 26 13 9.5 0.079 9.4 9.9 24 15 8.5 0.082 10.8 11.4 21 1N964 1N965 5.5 0.075 700 13 16 5 1N966 16 7.8 17 0.083 11.5 12.2 19 1N967 18 7 21 0.085 13 13.7 17 1N968 20 6.2 25 0.086 14.4 15.2 15 0.087 15.8 16.7 14 0.088 17.3 18.2 14 19.4 20.6 11 22.8 10 1N969 1N970 1N971 22 5.6 24 5.2 27 4.6 29 750 0.25 33 41 0.090 5 1N972 30 4.2 49 0.091 21.6 1N973 33 3.8 58 0.092 23.8 25.1 9.0 1N974 36 3.4 70 0.093 25.9 27.4 8.5 1N975 39 3.2 80 0.094 28.1 29.7 7.8 43 3 0.095 31 32.7 7.0 47 2.7 0.095 33.8 35.8 6.4 51 2.5 0.096 36.7 38.8 5.9 1N976 1N977 1N978 1000 93 105 1500 125 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