2SA1940O Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -120 V
• Collector-Base Voltage, max: -120 V
• Emitter-Base Voltage, max: -5 V
• Collector Current − Continuous, max: -8 A
• Collector Dissipation: 80 W
• DC Current Gain (h_fe): 80 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 2SA1940O transistor can have a current gain of 80 to 160. The gain of the 2SA1940 will be in the range from 55 to 160, for the 2SA1940R it will be in the range from 55 to 100.Sometimes the "2S" prefix is not marked on the package - the 2SA1940O might only be marked "A1940O".The complementary NPN transistor to the 2SA1940O is the 2SC5197O.You can replace the 2SA1940O with the 2SA1093, 2SA1093-O, 2SA1104, 2SA1105, 2SA1106, 2SA1146, 2SA1146-O, 2SA1186, 2SA1264, 2SA1264-O, 2SA1264N, 2SA1264N-O, 2SA1265, 2SA1265-O, 2SA1301, 2SA1301O, 2SA1302, 2SA1302O, 2SA1303, 2SA1386, 2SA1386A, 2SA1386A-O, 2SA1386A-P, 2SA1386A-Y, 2SA1490, 2SA1491, 2SA1492, 2SA1516, 2SA1633, 2SA1694, 2SA1695, 2SA1788, 2SA1804, 2SA1804-O, 2SA1805, 2SA1805-O, 2SA1941, 2SA1941O, 2SA1942, 2SA1942O, 2SA1943, 2SA1943N, 2SA1943O, 2SA1986, 2SA1986-O, 2SA2062, 2SA2063, 2SA2120, 2SA2120-O, 2SA2121, 2SA2121-O, 2SA2151, 2SA2151A, 2SA2151A-O, 2SA2151A-P, 2SA2151A-Y, 2SB1162, 2SB1162-S, 2SB1163, 2SB1163-S, 2SB1361, 2SB1361-S, 2SB1362, 2SB1429, 2SB1429-O, 2SB688, 2SB688O, 2SB778, 2SB778-O, 2SB816, 2SB817, 2SB863, 2SB863-O, 2SB966, FJA4210, KTA1943, KTA1943A, KTA1943AO, KTA1943O, KTA1962, KTA1962A, KTA1962AO, KTA1962O, KTB688, KTB688-O, KTB688B, KTB688B-O, KTB778, KTB778-O, KTB817, KTB817B, MJW1302A, MJW1302AG, NTE2329, TTA0001, TTA0002 or TTA1943.