BF421, BF423 Small Signal Transistors (PNP) TO-92 FEATURES .142 (3.6) min. .492 (12.5) .181 (4.6) .181 (4.6) PNP Silicon Epitaxial Transistors especially suited for application in class-B video output stages of TV receivers and monitors. As complementary types, the NPN tran- sistors BF420 and BF422 are recommended. max. .022 (0.55) .098 (2.5) B E MECHANICAL DATA C Case: TO-92 Plastic Package Weight: approx. 0.18 g Dimensions in inches and (millimeters) MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS Ratings at 25 C ambient temperature unless otherwise specified Symbol Value Unit Collector-Base Voltage BF421 BF423 -VCBO -VCBO 300 250 V V Collector-Emitter Voltage BF423 -VCEO 250 V Collector-Emitter Voltage BF421 -VCER 300 V Emitter-Base Voltage -VEBO 5 V Collector Current -IC 50 mA Peak Collector Current -ICM 100 mA Power Dissipation at Tamb = 25 C Ptot 8301) mW Junction Temperature Tj 150 C Storage Temperature Range TS -65 to +150 C 1) 4/98 Valid provided that leads are kept at ambient temperature at a distance of 2 mm from case. BF421, BF423 ELECTRICAL CHARACTERISTICS Ratings at 25 C ambient temperature unless otherwise specified Symbol Min. Typ. Max. Unit Collector-Base Breakdown Voltage at -IC = 100 A, IE = 0 BF421 BF423 -V(BR)CBO -V(BR)CBO 300 250 - - - - V V Collector-Emitter Breakdown Voltage at -IC = 10 mA, IB = 0 BF423 -V(BR)CEO 250 - - V Collector-Emitter Breakdown Voltage at RBE = 2.7 k, at -IC = 10 mA BF421 -V(BR)CER 300 - - V Emitter-Base Breakdown Voltage at -IE = 100 A, IC = 0 -V(BR)EBO 5 - - V Collector-Base Cutoff Current at -VCB = 200 V, IE = 0 -ICBO - - 10 nA 50 10 nA A Collector-Emitter Cutoff Current at RBE = 2.7 k, -VCE = 250 V at RBE = 2.7 k, -VCE = 200 V, Tj = 150 C -ICER -ICER Collector Saturation Voltage at -IC = 30 mA, -IB = 5 mA -VCEsat - - 0.8 V DC Current Gain at -VCE = 20 V, -IC = 25 mA hFE 50 - - - Gain-Bandwidth Product at -VCE = 10 V, -IC = 10 mA fT 60 - - MHz Feedback Capacitance at -VCE = 30 V, -IC = 0, f = 1 MHz Cre - - 1.6 pF Thermal Resistance Junction to Ambient Air RthJA - - 1501) K/W 1) Valid provided that leads are kept at ambient temperature at a distance of 2 mm from case.