2SB1205-S Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -20 V
• Collector-Base Voltage, max: -25 V
• Emitter-Base Voltage, max: -5 V
• Collector Current − Continuous, max: -5 A
• Collector Dissipation: 10 W
• DC Current Gain (h_fe): 140 to 280
• Transition Frequency, min: 320 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-251

Here is an image showing the pin diagram of this transistor.The 2SB1205-S transistor can have a current gain of 140 to 280. The gain of the 2SB1205 will be in the range from 100 to 400, for the 2SB1205-R it will be in the range from 100 to 200, for the 2SB1205-T it will be in the range from 200 to 400.Sometimes the "2S" prefix is not marked on the package - the 2SB1205-S might only be marked "B1205-S".The complementary NPN transistor to the 2SB1205-S is the 2SD1805-S.