2SA1265 Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -140 V
• Collector-Base Voltage, max: -140 V
• Emitter-Base Voltage, max: -5 V
• Collector Current − Continuous, max: -10 A
• Collector Dissipation: 100 W
• DC Current Gain (h_fe): 55 to 160
• Transition Frequency, min: 30 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-3P

Here is an image showing the pin diagram of this transistor.The 2SA1265 transistor can have a current gain of 55 to 160. The gain of the 2SA1265-O will be in the range from 55 to 160, for the 2SA1265-R it will be in the range from 55 to 110.Sometimes the "2S" prefix is not marked on the package - the 2SA1265 might only be marked "A1265".The complementary NPN transistor to the 2SA1265 is the 2SC3182.You can replace the 2SA1265 with the 2SA1106, 2SA1146, 2SA1186, 2SA1301, 2SA1302, 2SA1303, 2SA1386, 2SA1386A, 2SA1386A-O, 2SA1386A-P, 2SA1386A-Y, 2SA1491, 2SA1492, 2SA1516, 2SA1695, 2SA1805, 2SA1941, 2SA1942, 2SA1943, 2SA1962, 2SA1986, 2SA2120, 2SA2121, 2SA2151, 2SA2151A, 2SA2151A-O, 2SA2151A-P, 2SA2151A-Y, 2SB1429, 2SB863, FJA4210, FJA4213, FJL4215, KTA1943, KTA1943A, KTA1962, KTA1962A, MJW1302A, MJW1302AG or NTE2329.