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 Max. 0.5 Zener voltages are upon request. Min. 27.5 Max. 1.9 Black Cathode Band Black Part No. Black "ST" Brand XXX Max. 3.9 ST Min. 27.5 Glass Case DO-35 Dimensions in mm Absolute Maximum Ratings (Ta = 25 OC) Parameter Symbol Power Dissipation Ptot Value Unit 1) mW 500 Junction Temperature Tj 175 O Storage Temperature Range TS - 65 to + 175 O 1) C C Valid provided that leads are kept at ambient temperature at a distance of 8 mm from case Characteristics at Ta = 25 OC Parameter Symbol Max. Unit RthA 0.3 1) K/mW VF 1.5 V Thermal Resistance Junction to Ambient Air Forward Voltage at IF = 200 mA 1) 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 Maximum Dynamic resistance Maximum Reverse Leakage Current 2) Test-Voltage (VR) Maximum Regulator Current IZM (mA) VZnom lZT rzjT rzjk at IZK IR Suffix A Suffix B V mA Ω Ω mA µA V V 6.8 18.5 4.5 700 1 150 4.9 5.2 47 1N958 7.5 16.5 5.5 700 0.5 75 5.4 5.7 42 1N959 8.2 15 6.5 700 0.5 50 5.9 6.2 38 1N960 9.1 14 7.5 700 0.5 25 6.6 6.9 35 1N961 10 12.5 8.5 700 0.25 10 7.2 7.6 32 1N962 11 11.5 9.5 700 0.25 5 8 8.4 28 1N963 12 10.5 11.5 700 0.25 5 8.6 9.1 26 1N964 13 9.5 13 700 0.25 5 9.4 9.9 24 1N965 15 8.5 16 700 0.25 5 10.8 11.4 21 1N966 16 7.8 17 700 0.25 5 11.5 12.2 19 1N967 18 7 21 750 0.25 5 13 13.7 17 1N968 20 6.2 25 750 0.25 5 14.4 15.2 15 1N969 22 5.6 29 750 0.25 5 15.8 16.7 14 1N970 24 5.2 33 750 0.25 5 17.3 18.2 13 1N971 27 4.6 41 750 0.25 5 19.4 20.6 11 1N972 30 4.2 49 1000 0.25 5 21.6 22.8 10 1N973 33 3.8 58 1000 0.25 5 23.8 25.1 9 1N974 36 3.4 70 1000 0.25 5 25.9 27.4 8.5 1N975 39 3.2 80 1000 0.25 5 28.1 29.7 7.8 1N976 43 3 93 1500 0.25 5 31 32.7 7 1N977 47 2.7 105 1500 0.25 5 33.8 35.8 6.4 1N978 51 2.5 125 1500 0.25 5 36.7 38.8 5.9 1N957 2) 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) 1) 400 300 200 100 0 0 25 100 150 Ambient Temperature: Ta ( C) 200 O 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