BC237...BC239 NPN Silicon Epitaxial Planar Transistor for switching and amplifier applications The transistor is subdivided into three groups, A, B, and C, according to its DC current gain. 1. Collector 2. Base 3. Emitter TO-92 Plastic Package Absolute Maximum Ratings (Ta = 25 OC) Parameter Symbol BC237 BC238 BC239 Unit Collector Base Voltage VCBO 50 30 30 V Collector Emitter Voltage VCEO 45 25 25 V Emitter Base Voltage VEBO 6 Collector Current 5 V IC 100 mA Ptot 500 mW Junction Temperature Tj 150 O Storage Temperature Range TS - 55 to + 150 O Total Power Dissipation C C Characteristics at Ta = 25 OC Parameter DC Current Gain at VCE = 5 V, IC = 2 mA Current Gain Group A B C Collector Base Cutoff Current at VCB = 50 V at VCB = 30 V Collector Emitter Breakdown Voltage at IC = 2 mA Emitter Base Breakdown Voltage at IE = 100 µA Collector Emitter Saturation Voltage at IC = 10 mA, IB = 0.5 mA at IC = 100 mA, IB = 5 mA Base Emitter Saturation Voltage at IC = 10 mA, IB = 0.5 mA at IC = 100 mA, IB = 5 mA Base Emitter On Voltage at VCE = 5 V, IC = 2 mA BC237 BC238, BC239 BC237 BC238, BC239 BC237 BC238, BC239 Symbol Min. Max. Unit hFE hFE hFE 120 180 380 220 460 800 - ICBO 45 25 15 15 - nA 6 5 - VCE(sat) - 0.2 0.6 V VBE(sat) - 0.83 1.05 V VBE(on) 0.55 0.7 V fT 150 - MHz Cob - 4.5 pF V(BR)CEO V(BR)EBO Current Gain Bandwidth Product at VCE = 5 V, IC = 10 mA, f = 100 MHz Collector Base Capacitance at VCB = 10 V, f = 1 MHz V V SEMTECH ELECTRONICS LTD. (Subsidiary of Sino-Tech International Holdings Limited, a company listed on the Hong Kong Stock Exchange, Stock Code: 724) ® Dated : 27/12/2007 BC237...BC239 SEMTECH ELECTRONICS LTD. (Subsidiary of Sino-Tech International Holdings Limited, a company listed on the Hong Kong Stock Exchange, Stock Code: 724) ® Dated : 27/12/2007