2SB546-O Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -150 V
• Collector-Base Voltage, max: -200 V
• Emitter-Base Voltage, max: -5 V
• Collector Current − Continuous, max: -2 A
• Collector Dissipation: 25 W
• DC Current Gain (h_fe): 70 to 140
• Transition Frequency, min: 5 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-220

Here is an image showing the pin diagram of this transistor.The 2SB546-O transistor can have a current gain of 70 to 140. The gain of the 2SB546 will be in the range from 40 to 240, for the 2SB546-R it will be in the range from 40 to 80, for the 2SB546-Y it will be in the range from 120 to 240.Sometimes the "2S" prefix is not marked on the package - the 2SB546-O might only be marked "B546-O".The complementary NPN transistor to the 2SB546-O is the 2SD401-O.You can replace the 2SB546-O with the 2SA1667, 2SA1668, 2SA1859, 2SA1859A, 2SB546A, 2SB547, 2SB630, 2SB861, 2SB940, 2SB940-Q, 2SB940A, 2SB940A-Q, FJP1943, FJPF1943, KSB546, KSB546-O, KTB1369, KTB1369O, MJE15031, MJE15031G, MJE15033, MJE15033G, MJE5850, MJE5850G, MJF15031 or MJF15031G.