2SC3866 Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 800 V
• Collector-Base Voltage, max: 900 V
• Emitter-Base Voltage, max: 10 V
• Collector Current − Continuous, max: 3 A
• Collector Dissipation: 40 W
• DC Current Gain (h_fe): 10
• 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 2SC3866 might only be marked "C3866".You can replace the 2SC3866 with the 2SC3150, 2SC3150-K, 2SC3150-L, 2SC3150-M, 2SC3457, 2SC3457-L, 2SC3457-M, 2SC3457-N, 2SC3752, 2SC3752-K, 2SC3752-L, 2SC3752-M, 2SC5353, FJPF5027, FJPF5027-N, FJPF5027-O, FJPF5027-R, KSC5027, KSC5027-N, KSC5027-O, KSC5027-R, KSC5027F, KSC5027F-N, KSC5027F-O or KSC5027F-R.