2SB548 Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -80 V
• Collector-Base Voltage, max: -100 V
• Emitter-Base Voltage, max: -5 V
• Collector Current − Continuous, max: -0.8 A
• Collector Dissipation: 10 W
• DC Current Gain (h_fe): 40 to 320
• Transition Frequency, min: 70 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-126

Here is an image showing the pin diagram of this transistor.The 2SB548 transistor can have a current gain of 40 to 320. The gain of the 2SB548-P will be in the range from 160 to 320, for the 2SB548-Q it will be in the range from 100 to 200, for the 2SB548-R it will be in the range from 60 to 120, for the 2SB548-S it will be in the range from 40 to 80.Sometimes the "2S" prefix is not marked on the package - the 2SB548 might only be marked "B548".The complementary NPN transistor to the 2SB548 is the 2SD414.You can replace the 2SB548 with the 2SB549, BD170, BD238, BD238G, BD380, MJE252, MJE254 or MJE712.