2SA1103 Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -100 V
• Collector-Base Voltage, max: -100 V
• Emitter-Base Voltage, max: -6 V
• Collector Current − Continuous, max: -7 A
• Collector Dissipation: 70 W
• DC Current Gain (h_fe): 50 to 180
• 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.Sometimes the "2S" prefix is not marked on the package - the 2SA1103 might only be marked "A1103".The complementary NPN transistor to the 2SA1103 is the 2SC2578.You can replace the 2SA1103 with the 2SA1104, 2SA1105, 2SA1106, 2SA1186, 2SA1303, 2SA1386, 2SA1386A, 2SA1386A-O, 2SA1386A-P, 2SA1386A-Y, 2SA1490, 2SA1491, 2SA1492, 2SA1694, 2SA1695, 2SA2151, 2SB695, BD246C, BD250C, BDV96, FJA4210 or TIP36CA.