2SA1042 Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -70 V
• Collector-Base Voltage, max: -70 V
• Emitter-Base Voltage, max: -5 V
• Collector Current − Continuous, max: -15 A
• Collector Dissipation: 100 W
• DC Current Gain (h_fe): 35 to 200
• Transition Frequency, min: 60 MHz
• Operating and Storage Junction Temperature Range: -65 to +175 °C
• Package: TO-3

Here is an image showing the pin diagram of this transistor.Sometimes the "2S" prefix is not marked on the package - the 2SA1042 might only be marked "A1042".The complementary NPN transistor to the 2SA1042 is the 2SC2432.You can replace the 2SA1042 with the 2SA1041, 2SA1043, 2SA1044, 2SA907, BD316 or BD318.