2SB731 Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -50 V
• Collector-Base Voltage, max: -60 V
• Emitter-Base Voltage, max: -6 V
• Collector Current − Continuous, max: -1 A
• Collector Dissipation: 10 W
• DC Current Gain (h_fe): 135 to 600
• Transition Frequency, min: 75 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 2SB731 transistor can have a current gain of 135 to 600. The gain of the 2SB731-E will be in the range from 360 to 600, for the 2SB731-F it will be in the range from 300 to 480, for the 2SB731-K it will be in the range from 200 to 400, for the 2SB731-L it will be in the range from 135 to 270.Sometimes the "2S" prefix is not marked on the package - the 2SB731 might only be marked "B731".The 2SB1115 (SOT-89), 2SB1122 (SOT-89), FMMTA55 (SOT-23), KST55 (SOT-23), MMBTA55 (SOT-23), PZTA55 (SOT-223) and SMBTA55 (SOT-23) is the SMD version of the 2SB731 transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the 2SB731 with the BD168, BD170, BD190, BD236, BD236G, BD238, BD238G, MJE235, MJE252, MJE254, MJE711 or MJE712.