2SD1261A-P Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 80 V
• Collector-Base Voltage, max: 80 V
• Emitter-Base Voltage, max: 5 V
• Collector Current − Continuous, max: 4 A
• Collector Dissipation: 40 W
• DC Current Gain (h_fe): 4000 to 10000
• Transition Frequency, min: 20 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-252

Here is an image showing the pin diagram of this transistor.The 2SD1261A-P transistor can have a current gain of 4000 to 10000. The gain of the 2SD1261A will be in the range from 1000 to 10000, for the 2SD1261A-Q it will be in the range from 2000 to 5000, for the 2SD1261A-R it will be in the range from 1000 to 2500.Sometimes the "2S" prefix is not marked on the package - the 2SD1261A-P might only be marked "D1261A-P".The complementary PNP transistor to the 2SD1261A-P is the 2SB938A-P.You can replace the 2SD1261A-P with the 2SD1223, 2SD1262A, 2SD1262A-P, MJD122, MJD122G, MJD122T4 or MJD122T4G.