2SB631K Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -120 V
• Collector-Base Voltage, max: -120 V
• Emitter-Base Voltage, max: -5 V
• Collector Current − Continuous, max: -1 A
• Collector Dissipation: 8 W
• DC Current Gain (h_fe): 60 to 320
• Transition Frequency, min: 130 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 2SB631K transistor can have a current gain of 60 to 320. The gain of the 2SB631K-D will be in the range from 60 to 120, for the 2SB631K-E it will be in the range from 100 to 200, for the 2SB631K-F it will be in the range from 160 to 320.Sometimes the "2S" prefix is not marked on the package - the 2SB631K might only be marked "B631K".The complementary NPN transistor to the 2SB631K is the 2SD600K.You can replace the 2SB631K with the 2SA1021, 2SA1220, 2SA1220A, 2SB649, KSA1220 or KSA1220A.