2SB744A Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -60 V
• Collector-Base Voltage, max: -70 V
• Emitter-Base Voltage, max: -5 V
• Collector Current − Continuous, max: -3 A
• Collector Dissipation: 10 W
• DC Current Gain (h_fe): 60 to 320
• Transition Frequency, min: 45 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 2SB744A transistor can have a current gain of 60 to 320. The gain of the 2SB744A-O will be in the range from 100 to 200, for the 2SB744A-R it will be in the range from 60 to 120, for the 2SB744A-Y it will be in the range from 160 to 320.Sometimes the "2S" prefix is not marked on the package - the 2SB744A might only be marked "B744A".The complementary NPN transistor to the 2SB744A is the 2SD794A.You can replace the 2SB744A with the BD190, KSB744A, MJE235, MJE252 or MJE254.