2SB903-S Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -30 V
• Collector-Base Voltage, max: -60 V
• Emitter-Base Voltage, max: -6 V
• Collector Current − Continuous, max: -12 A
• Collector Dissipation: 35 W
• DC Current Gain (h_fe): 140 to 280
• Transition Frequency, min: 120 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 2SB903-S transistor can have a current gain of 140 to 280. The gain of the 2SB903 will be in the range from 70 to 280, for the 2SB903-Q it will be in the range from 70 to 140, for the 2SB903-R it will be in the range from 100 to 200.Sometimes the "2S" prefix is not marked on the package - the 2SB903-S might only be marked "B903-S".The complementary NPN transistor to the 2SB903-S is the 2SD1212-S.You can replace the 2SB903-S with the 2SA1744, 2SB1136, 2SB1136-S, 2SB826, 2SB826-S, BD546, BD546A, BDT82 or BDT82F.