2SB1548A Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -80 V
• Collector-Base Voltage, max: -80 V
• Emitter-Base Voltage, max: -5 V
• Collector Current − Continuous, max: -3 A
• Collector Dissipation: 25 W
• DC Current Gain (h_fe): 70 to 250
• Transition Frequency, min: 30 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-220F

Here is an image showing the pin diagram of this transistor.The 2SB1548A transistor can have a current gain of 70 to 250. The gain of the 2SB1548A-P will be in the range from 120 to 250, for the 2SB1548A-Q it will be in the range from 70 to 150.Sometimes the "2S" prefix is not marked on the package - the 2SB1548A might only be marked "B1548A".The complementary NPN transistor to the 2SB1548A is the 2SD2374A.The BDP952 (SOT-223) is the SMD version of the 2SB1548A transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the 2SB1548A with the 2SA1488A, 2SA1634, 2SA1635, 2SA771, 2SB633, 2SB761A, 2SB762A, 2SB870, 2SB941A, 2SB942A, 2SB945, 2SB946, BD242B, BD242C, BD244B, BD244C, BD538, BD540B, BD540C, BD544B, BD544C, BD546B, BD546C, BD800, BD802, BD810, BD938, BD938F, BD940, BD940F, BD942, BD942F, BD952, BD954, BD956, BDT84, BDT84F, BDT86, BDT86F, BDT88, BDT88F, BDX78, D44C10, D44C11, D44C12, D45C10, D45C11, D45C12, D45H11, D45H11FP, MJE15029, MJE15029G, MJE15031, MJE15031G, MJF15031 or MJF15031G.