2SA748-Q Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -50 V
• Collector-Base Voltage, max: -70 V
• Emitter-Base Voltage, max: -5 V
• Collector Current − Continuous, max: -2 A
• Collector Dissipation: 15 W
• DC Current Gain (h_fe): 80 to 160
• Transition Frequency, min: 120 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 2SA748-Q transistor can have a current gain of 80 to 160. The gain of the 2SA748 will be in the range from 50 to 220, for the 2SA748-P it will be in the range from 50 to 100, for the 2SA748-R it will be in the range from 120 to 220.Sometimes the "2S" prefix is not marked on the package - the 2SA748-Q might only be marked "A748-Q".The complementary NPN transistor to the 2SA748-Q is the 2SC1398-Q.The FMMT551 (SOT-23) and KTA1668 (SOT-89) is the SMD version of the 2SA748-Q transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the 2SA748-Q with the 2SA1008, 2SA1010, 2SA1012, 2SA1262, 2SA1279, 2SA1288, 2SA1289, 2SA1290, 2SA1291, 2SA1293, 2SA1307, 2SA1308, 2SA1328, 2SA1329, 2SA1388, 2SA1451, 2SA1451A, 2SA1452, 2SA1452A, 2SA1469, 2SA1470, 2SA1471, 2SA1488, 2SA1488A, 2SA1634, 2SA1635, 2SA1725, 2SA1726, 2SA1869, 2SA489, 2SA614, 2SA671, 2SA754, 2SA755, 2SA768, 2SA769, 2SA770, 2SA771, 2SB1015, 2SB1016, 2SB1016A, 2SB1017, 2SB1018, 2SB1018A, 2SB1019, 2SB1090, 2SB1097, 2SB1133, 2SB1134, 2SB1135, 2SB1136, 2SB1185, 2SB1187, 2SB1274, 2SB1366, 2SB1367, 2SB1368, 2SB1548, 2SB1548A, 2SB434, 2SB507, 2SB514, 2SB553, 2SB565, 2SB566, 2SB566A, 2SB595, 2SB596, 2SB633, 2SB703, 2SB703A, 2SB707, 2SB708, 2SB747, 2SB761, 2SB761A, 2SB762, 2SB762A, 2SB824, 2SB825, 2SB826, 2SB834, 2SB857, 2SB858, 2SB870, 2SB941, 2SB941A, 2SB942, 2SB942A, 2SB945, 2SB946, 2SB992, 2SB993, 2SB994, 2SB995, 2SB996, BD204, BD240A, BD240B, BD240C, BD242A, BD242B, BD242C, BD244A, BD244B, BD244C, BD304, BD536, BD538, BD540A, BD540B, BD540C, BD544A, BD544B, BD544C, BD546A, BD546B, BD546C, BD798, BD800, BD802, BD808, BD810, BD936, BD936F, BD938, BD938F, BD940, BD940F, BD950, BD952, BD954, BDT82, BDT82F, BDT84, BDT84F, BDT86, BDT86F, BDT92, BDT92F, BDT94, BDT94F, BDT96, BDT96F, BDX78, D44C10, D44C11, D44C12, D44C7, D44C8, D44C9, D45C10, D45C11, D45C12, D45C7, D45C8, D45C9, D45H11, D45H11FP, D45H8, KSA1010, KSA614, KSB1015, KSB1017, KSB1097, KSB596, KSB707, KSB708, KSB834, KTA1038, KTA1049, KTB1366, KTB1367, KTB1368, KTB988 or NTE153.