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2N4957 Datasheet(PDF) 2 Page - Semicoa Semiconductor |
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2N4957 Datasheet(HTML) 2 Page - Semicoa Semiconductor |
2 / 2 page Data Sheet No. 2N4957 OFF Characteristics Symbol Min Max Unit Collector-Base Breakdown Voltage IC = 100 µA, IE = 0 Collector-Emitter Breakdown Voltage IC = 1.0 mA, IB = 0 Emitter-Base Breakdown Voltage IE = 100 µA, IC = 0 Collector-Base Cutoff Current VCB = 20 V, IE 0, TC = +25 oC Collector-Base Cutoff Current VCB = 20 V, IE 0, TC = +150 oC --- V(BR)EBO 3.0 --- V Electrical Characteristics TC = 25 oC unless otherwise specified V V V(BR)CBO 30 --- V(BR)CEO 30 100 µA ICBO1 --- 100 na ICBO2 --- ON Characteristics Symbol Min Max Unit DC Current Gain IC = 0.5 mA, VCE = 10 V hFE1 15 --- --- IC = 2.0 mA, VCE = 10 V hFE2 20 --- --- IC = 5.0 mA, VCE = 10 V hFE3 30 165 --- IC = 5.0 mA, VCE = 10 V, TA = -55 oC hFE4 10 --- --- Small Signal Characteristics Symbol Min Max Unit Magnitude of Common Emitter Small Signal Short Circuit Forward Current Transfer Ratio VCE = 10 V, IE = 2.0 mA, f = 100 MHz Collector to Base Feedback Capacitance VCB = 10 V, IE = 0, 100 kHz < f < 1 MHz Collector to Base Time Constant VCB = 10 V, IE = 2.0 mA, f = 63.6 MHz Common Emitter Small Signal Power Gain VCE = 10 V, IC = 2.0 mA, f = 450 MHz rb'CC 1.0 8.0 ps pF Ccb --- 0.8 --- |hfe| 12 36 GPE 17 25 dB |
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