2SA473 Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -30 V
• Collector-Base Voltage, max: -30 V
• Emitter-Base Voltage, max: -5 V
• Collector Current − Continuous, max: -3 A
• Collector Dissipation: 10 W
• DC Current Gain (h_fe): 70 to 240
• Transition Frequency, min: 100 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-220

Here is an image showing the pin diagram of this transistor.The 2SA473 transistor can have a current gain of 70 to 240. The gain of the 2SA473O will be in the range from 70 to 140, for the 2SA473Y it will be in the range from 120 to 240.Sometimes the "2S" prefix is not marked on the package - the 2SA473 might only be marked "A473".The complementary NPN transistor to the 2SA473 is the 2SC1173.You can replace the 2SA473 with the 2SA1012, 2SA1262, 2SA1279, 2SA1288, 2SA1289, 2SA1290, 2SA1291, 2SA1305, 2SA1307, 2SA1328, 2SA1451, 2SA1451A, 2SA1469, 2SA1470, 2SA1471, 2SA1488, 2SA1869, 2SA489, 2SA490, 2SA614, 2SA768, 2SA770, 2SB1019, 2SB1133, 2SB1134, 2SB1135, 2SB1136, 2SB1185, 2SB1187, 2SB1274, 2SB1548, 2SB434, 2SB435, 2SB507, 2SB553, 2SB761, 2SB762, 2SB824, 2SB825, 2SB826, 2SB834, 2SB857, 2SB858, 2SB903, 2SB919, 2SB941, 2SB942, 2SB947A, 2SB948A, 2SB993, BD202, BD204, BD242, BD242A, BD244, BD244A, BD302, BD304, BD534, BD536, BD540, BD540A, BD544, BD544A, BD546, BD546A, BD736, BD738, BD796, BD798, BD808, BD934, BD934F, BD936, BD936F, BD950, BDT82, BDT82F, D44C1, D44C2, D44C3, D44C4, D44C5, D44C6, D44C7, D44C8, D44C9, D45C1, D45C2, D45C3, D45C4, D45C5, D45C6, D45C7, D45C8, D45C9, D45H8, KSA473, KSA614, KTA1276, KTA1658 or KTB988.