2SA743-B Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -50 V
• Collector-Base Voltage, max: -50 V
• Emitter-Base Voltage, max: -4 V
• Collector Current − Continuous, max: -1 A
• Collector Dissipation: 8 W
• DC Current Gain (h_fe): 60 to 120
• Transition Frequency, min: 120 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 2SA743-B transistor can have a current gain of 60 to 120. The gain of the 2SA743 will be in the range from 60 to 200, for the 2SA743-C it will be in the range from 100 to 200.Sometimes the "2S" prefix is not marked on the package - the 2SA743-B might only be marked "A743-B".The complementary NPN transistor to the 2SA743-B is the 2SC1212-B.The 2SA1364 (SOT-89), 2SA1364-C (SOT-89), 2SA1518 (SOT-23), 2SA1519 (SOT-23), 2SA1520 (SOT-23), 2SA1521 (SOT-23), BCP52 (SOT-223), FMMTA55 (SOT-23), KST55 (SOT-23) and MMBT4354 (SOT-23) is the SMD version of the 2SA743-B transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the 2SA743-B with the 2N4919, 2N4919G, 2N4920, 2N4920G, 2SA1214, 2SA505, 2SA743A, 2SA743A-B, 2SB631, 2SB631-D, 2SB744A, 2SB744A-R, BD138, BD138G, BD140, BD140G, BD168, BD170, BD178, BD180, BD180G, BD190, BD229, BD231, BD236, BD236G, BD238, BD238G, BD378, BD380, BD440, BD440G, BD442, BD442G, BD788, BD788G, BD790, BD792, KSB744A, KSB744A-R, KSE171, KSE172, MJE171, MJE171G, MJE172, MJE172G, MJE233, MJE234, MJE235, MJE250, MJE251, MJE252, MJE253, MJE253G, MJE254, MJE711 or MJE712.