1N978

1N957...1N978 SILICON PLANAR ZENER DIODES Standard Zener voltage tolerance is ± 20%. Add suffix "A" for ± 10% tolerance and suffix "B" for ± 5% tolerance. Other tolerances, non standard and higher Zener voltages are upon request. Max. 1.9 Black Cathode Band Black Part No. Black "ST" Brand Max. 0.5 Min. 27.5 XXX ST Max. 3.9 Min. 27.5 Glass Case DO-35 Dimensions in mm Absolute Maximum Ratings (Ta = 25 OC) Parameter Power Dissipation Junction Temperature Storage Temperature Range 1) Symbol Ptot Tj TS Value 500 1) Unit mW O 175 - 65 to + 175 C C O Valid provided that leads are kept at ambient temperature at a distance of 8 mm from case Characteristics at Ta = 25 OC Parameter Thermal Resistance Junction to Ambient Air Forward Voltage at IF = 200 mA 1) Symbol RthA VF Max. 0.3 1) 1.5 Unit K/mW V Valid provided that leads are kept at ambient temperature at a distance of 8 mm from case. SEMTECH ELECTRONICS LTD. ® (Subsidiary of Sino-Tech International Holdings Limited, a company listed on the Hong Kong Stock Exchange, Stock Code: 724) Dated : 13/06/2007 1N957...1N978 Characteristics at Ta = 25 OC Zener Voltage Range 1) 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 1) 2) Maximum Dynamic resistance rzjT Ω 4.5 5.5 6.5 7.5 8.5 9.5 11.5 13 16 17 21 25 29 33 41 49 58 70 80 93 105 125 rzjk Ω 700 700 700 700 700 700 700 700 700 700 750 750 750 750 750 1000 1000 1000 1000 1500 1500 1500 at IZK mA 1 0.5 0.5 0.5 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 Maximum Reverse Leakage Current 2) Test-Voltage (VR) IR µA 150 75 50 25 10 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 Suffix A 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 19.4 21.6 23.8 25.9 28.1 31 33.8 36.7 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 lZT 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 Regulator Current IZM (mA) 47 42 38 35 32 28 26 24 21 19 17 15 14 13 11 10 9 8.5 7.8 7 6.4 5.9 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 Tested with pulses tp = 20 ms Valid provided that leads are kept at ambient temperature at a distance of 8 mm from case. 500 Power Dissipation: Ptot (mW) 400 300 200 100 0 0 25 100 150 Ambient Temperature: Ta ( C) O 200 Power Derating Curve SEMTECH ELECTRONICS LTD. ® (Subsidiary of Sino-Tech International Holdings Limited, a company listed on the Hong Kong Stock Exchange, Stock Code: 724) Dated : 13/06/2007