2SA1279-Y Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -50 V
• Collector-Base Voltage, max: -60 V
• Emitter-Base Voltage, max: -5 V
• Collector Current − Continuous, max: -5 A
• Collector Dissipation: 25 W
• DC Current Gain (h_fe): 120 to 240
• Transition Frequency, min: 60 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-220F

Here is an image showing the pin diagram of this transistor.The 2SA1279-Y transistor can have a current gain of 120 to 240. The gain of the 2SA1279 will be in the range from 70 to 240, for the 2SA1279-O it will be in the range from 70 to 140.Sometimes the "2S" prefix is not marked on the package - the 2SA1279-Y might only be marked "A1279-Y".The complementary NPN transistor to the 2SA1279-Y is the 2SC3239-Y.The 2SB1124 (SOT-89) and BDP950 (SOT-223) is the SMD version of the 2SA1279-Y transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the 2SA1279-Y with the 2SA1012, 2SA1012Y, 2SA1289, 2SA1290, 2SA1291, 2SA1293, 2SA1293-Y, 2SA1307, 2SA1307-Y, 2SA1308, 2SA1308-Y, 2SA1328, 2SA1328-Y, 2SA1329, 2SA1329-Y, 2SA1388, 2SA1388-Y, 2SA1451, 2SA1451-Y, 2SA1451A, 2SA1451A-Y, 2SA1452, 2SA1452-Y, 2SA1452A, 2SA1452A-Y, 2SA1469, 2SA1470, 2SA1471, 2SA1742, 2SA1743, 2SA1744, 2SA1931, 2SA770, 2SA771, 2SB1016, 2SB1016-Y, 2SB1016A, 2SB1016A-Y, 2SB1018, 2SB1018-Y, 2SB1018A, 2SB1018A-Y, 2SB1019, 2SB1019-Y, 2SB1134, 2SB1135, 2SB1136, 2SB1367, 2SB1367-Y, 2SB553, 2SB553-Y, 2SB595, 2SB595-Y, 2SB633, 2SB824, 2SB825, 2SB826, 2SB870, 2SB945, 2SB946, 2SB992, 2SB992-Y, 2SB993, 2SB993-Y, 2SB995, 2SB995-Y, BD204, BD244A, BD244B, BD244C, BD304, BD536, BD538, BD540A, BD540B, BD540C, BD544A, BD544B, BD544C, BD546A, BD546B, BD546C, BD798, BD800, BD802, BD808, BD810, BD950, BD952, BD954, BDT82, BDT82F, BDT84, BDT84F, BDT86, BDT86F, BDX78, D45H11, D45H11FP, D45H8, KTA1038, KTA1038-Y, KTA1049, KTA1049Y, KTB1367, KTB1367Y, TTA1452B or TTB1452B.