2SC2431 Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 120 V
• Collector-Base Voltage, max: 120 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: 80 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 2SC2431 might only be marked "C2431".The complementary PNP transistor to the 2SC2431 is the 2SA1041.You can replace the 2SC2431 with the 2SC2433 or 2SD753.