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| BF421, BF423 Small Signal Transistors (PNP) TO-92 .181 (4.6) min. .492 (12.5) .181 (4.6) .142 (3.6) FEATURES 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) E C B MECHANICAL DATA 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 Collector-Base Voltage Collector-Emitter Voltage Collector-Emitter Voltage Emitter-Base Voltage Collector Current Peak Collector Current Power Dissipation at Tamb = 25 C Junction Temperature Storage Temperature Range 1) Value 300 250 250 300 5 50 100 8301) 150 -65 to +150 Unit V V V V V mA mA mW C C BF421 BF423 BF423 BF421 -VCBO -VCBO -VCEO -VCER -VEBO -IC -ICM Ptot Tj TS Valid provided that leads are kept at ambient temperature at a distance of 2 mm from case. 4/98 BF421, BF423 ELECTRICAL CHARACTERISTICS Ratings at 25 C ambient temperature unless otherwise specified Symbol Collector-Base Breakdown Voltage at -IC = 100 A, IE = 0 Collector-Emitter Breakdown Voltage at -IC = 10 mA, IB = 0 Collector-Emitter Breakdown Voltage at RBE = 2.7 k, at -IC = 10 mA Emitter-Base Breakdown Voltage at -IE = 100 A, IC = 0 Collector-Base Cutoff Current at -VCB = 200 V, IE = 0 Collector-Emitter Cutoff Current at RBE = 2.7 k, -VCE = 250 V at RBE = 2.7 k, -VCE = 200 V, Tj = 150 C Collector Saturation Voltage at -IC = 30 mA, -IB = 5 mA DC Current Gain at -VCE = 20 V, -IC = 25 mA Gain-Bandwidth Product at -VCE = 10 V, -IC = 10 mA Feedback Capacitance at -VCE = 30 V, -IC = 0, f = 1 MHz Thermal Resistance Junction to Ambient Air 1) Min. 300 250 250 300 5 - Typ. - - - - - - Max. - - - - - 10 Unit V V V V V nA BF421 BF423 BF423 BF421 -V(BR)CBO -V(BR)CBO -V(BR)CEO -V(BR)CER -V(BR)EBO -ICBO -ICER -ICER -VCEsat hFE fT Cre RthJA - 50 60 - - - - - - - 50 10 0.8 - - 1.6 1501) nA A V - MHz pF K/W Valid provided that leads are kept at ambient temperature at a distance of 2 mm from case. |
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