2SC3149 Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 800 V
• Collector-Base Voltage, max: 900 V
• Emitter-Base Voltage, max: 7 V
• Collector Current − Continuous, max: 1.5 A
• Collector Dissipation: 40 W
• DC Current Gain (h_fe): 10 to 40
• Transition Frequency, min: 30 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-220

Here is an image showing the pin diagram of this transistor.The 2SC3149 transistor can have a current gain of 10 to 40. The gain of the 2SC3149K will be in the range from 10 to 20, for the 2SC3149L it will be in the range from 15 to 30, for the 2SC3149M it will be in the range from 20 to 40.Sometimes the "2S" prefix is not marked on the package - the 2SC3149 might only be marked "C3149".You can replace the 2SC3149 with the 2SC3150, 2SC3456, 2SC3457, 2SC3751, 2SC3752, 2SC3866, FJPF5027, KSC5026, KSC5027, KSC5027F or MJE8503.