2SC5171 Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 180 V
• Collector-Base Voltage, max: 180 V
• Emitter-Base Voltage, max: 5 V
• Collector Current − Continuous, max: 2 A
• Collector Dissipation: 20 W
• DC Current Gain (h_fe): 100 to 320
• Transition Frequency, min: 200 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-220F

Here is an image showing the pin diagram of this transistor.Sometimes the "2S" prefix is not marked on the package - the 2SC5171 might only be marked "C5171".The complementary PNP transistor to the 2SC5171 is the 2SA1930.You can replace the 2SC5171 with the 2SC4382, 2SD772A, 2SD772B, 2SD792A, 2SD792B, MJE15032, MJE15032G, MJE15034 or MJE15034G.