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1N979B Datasheet(PDF) 2 Page - Fairchild Semiconductor |
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1N979B Datasheet(HTML) 2 Page - Fairchild Semiconductor |
2 / 5 page ©2004 Fairchild Semiconductor Corporation 1N957B - 1N991B, Rev. E2 Electrical Characteristics (Continued) T A=25°C unless otherwise noted Notes: 1. Zener Voltage (VZ) Measurement Nominal zener voltage is measured with the device junction in the thermal equilibrium at the lead temperature (TL) at 30°C ± 1°C and 3/8” lead length. 2. Zener Impedance (ZZ) Derivation ZZT and ZZK are measured by dividing the ac voltage drop across the device by the ac current applied. The specified limits are for IZ(ac) = 0.1 IZ(dc) with the ac frequency = 60Hz. 3. Maximum Zener Current Ratings (IZM) The maximum current handling capability on a worst case basis is limited by the actual zener voltage at the operation point and the power derating curve. Device VZ (Volts) (Note 1) ZZ (Ω) (Note 2) IR @ VR IZM (mA) (Note 3) Min. Typ. Max. @ IZ ZZ @ IZ ZZK @ IZK µAVolts Ω mA 1N982B 1N983B 1N984B 1N985B 1N986B 71.25 77.9 86.45 95 104.5 75 82 91 100 110 78.75 86.1 95.55 105 115.5 1.7 1.5 1.4 1.3 1.1 270 330 400 500 750 2000 3000 3000 3000 4000 0.25 0.25 0.25 0.25 0.25 5 5 5 5 5 56.0 62.2 69.2 76.0 83.6 4.1 3.7 3.3 3.0 2.7 1N987B 1N988B 1N989B 1N990B 1N991B 114 123.5 142.5 152 171 120 130 150 160 180 126 136.5 157.5 168 189 1.0 0.95 0.85 0.80 0.68 900 1100 1500 1700 2200 4500 5000 6000 6500 7100 0.25 0.25 0.25 0.25 0.25 5 5 5 5 5 91.2 98.8 114 121.6 136.8 2.5 2.3 2.0 1.9 1.7 |
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