2SC3946 Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 300 V
• Collector-Base Voltage, max: 350 V
• Emitter-Base Voltage, max: 8 V
• Collector Current − Continuous, max: 0.2 A
• Collector Dissipation: 15 W
• DC Current Gain (h_fe): 40 to 250
• Transition Frequency, min: 50 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 2SC3946 might only be marked "C3946".You can replace the 2SC3946 with the 2SC2898, 2SC3310, 2SC3794, 2SC3794A, 2SC3795, 2SC3795A, 2SC3868, 2SC4242, 2SC5241, 2SD1263A, BUX84, BUX85, MJE13070, MJE13071, MJE16002 or MJE16004.