2SD1271-P Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 80 V
• Collector-Base Voltage, max: 130 V
• Emitter-Base Voltage, max: 7 V
• Collector Current − Continuous, max: 7 A
• Collector Dissipation: 40 W
• DC Current Gain (h_fe): 130 to 260
• Transition Frequency, min: 30 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 2SD1271-P transistor can have a current gain of 130 to 260. The gain of the 2SD1271 will be in the range from 60 to 260, for the 2SD1271-Q it will be in the range from 90 to 180, for the 2SD1271-R it will be in the range from 60 to 120.Sometimes the "2S" prefix is not marked on the package - the 2SD1271-P might only be marked "D1271-P".The complementary PNP transistor to the 2SD1271-P is the 2SB946-P.You can replace the 2SD1271-P with the 2SD866, 2SD866-P, 2SD866A, 2SD866A-P, BD537, BD543B, BD543C, BD545B, BD545C, BD799, BD801, BD809, BDT83, BDT83F, BDT85, BDT85F, BDT87, BDT87F, BDX77, D44H11, D44H11FP, MJE15028, MJE15028G, MJE15030, MJE15030G, MJF15030 or MJF15030G.