2SA1491-P Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -140 V
• Collector-Base Voltage, max: -140 V
• Emitter-Base Voltage, max: -6 V
• Collector Current − Continuous, max: -10 A
• Collector Dissipation: 100 W
• DC Current Gain (h_fe): 70 to 140
• Transition Frequency, min: 20 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 2SA1491-P transistor can have a current gain of 70 to 140. The gain of the 2SA1491 will be in the range from 50 to 180, for the 2SA1491-O it will be in the range from 50 to 100, for the 2SA1491-Y it will be in the range from 90 to 180.Sometimes the "2S" prefix is not marked on the package - the 2SA1491-P might only be marked "A1491-P".The complementary NPN transistor to the 2SA1491-P is the 2SC3855-P.You can replace the 2SA1491-P with the 2SA1106, 2SA1146, 2SA1186, 2SA1186-P, 2SA1265, 2SA1265-O, 2SA1294, 2SA1294-Y, 2SA1301, 2SA1302, 2SA1303, 2SA1303-P, 2SA1386, 2SA1386-P, 2SA1386A, 2SA1386A-O, 2SA1386A-P, 2SA1386A-Y, 2SA1492, 2SA1492-P, 2SA1516, 2SA1633, 2SA1695, 2SA1695-P, 2SA1805, 2SA1941, 2SA1942, 2SA1943, 2SA1962, 2SA1986, 2SA2062, 2SA2063, 2SA2120, 2SA2121, 2SA2151, 2SA2151-P, 2SA2151A, 2SA2151A-O, 2SA2151A-P, 2SA2151A-Y, 2SA2223, 2SA2223-Y, 2SA2223A, 2SA2223A-Y, 2SB1162, 2SB1163, 2SB1429, 2SB817, 2SB863, FJA4210, FJA4210O, FJA4213, FJL4215, KTA1943, KTA1943A, KTA1962, KTA1962A, KTB817, KTB817B, MAG9413, MAG9413B, MG9410, MG9410-R, MG9411, MG9411-R, MJW1302A, MJW1302AG or NTE2329.