2SA743A-B Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -80 V
• Collector-Base Voltage, max: -80 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 2SA743A-B transistor can have a current gain of 60 to 120. The gain of the 2SA743A will be in the range from 60 to 200, for the 2SA743A-C it will be in the range from 100 to 200.Sometimes the "2S" prefix is not marked on the package - the 2SA743A-B might only be marked "A743A-B".The complementary NPN transistor to the 2SA743A-B is the 2SC1212A-B.The 2SA1368 (SOT-89), 2SA1368-C (SOT-89), BCP53 (SOT-223), BSP32 (SOT-223), BSR32 (SOT-89), FMMTA56 (SOT-23), KST56 (SOT-23) and MMBT4356 (SOT-23) is the SMD version of the 2SA743A-B transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the 2SA743A-B with the 2N4920, 2N4920G, 2SA1021, 2SA1021-R, 2SA1220, 2SA1220-R, 2SA1220A, 2SA1220A-R, 2SA1408, 2SA1408-R, 2SB631, 2SB631-D, 2SB631K, 2SB631K-D, 2SB649, 2SB649-B, 2SB649A, 2SB649A-B, BD140, BD140G, BD170, BD180, BD180G, BD231, BD238, BD238G, BD380, BD442, BD442G, BD790, BD792, KSA1220, KSA1220-R, KSA1220A, KSA1220A-R, KSE172, MJE172, MJE172G, MJE250, MJE251, MJE252, MJE253, MJE253G, MJE254 or MJE712.