KTC2025L 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: 1 A
• Collector Dissipation: 8 W
• DC Current Gain (h_fe): 100 to 320
• Transition Frequency, min: 130 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-251

Here is an image showing the pin diagram of this transistor.The KTC2025L transistor can have a current gain of 100 to 320. The gain of the KTC2025L-GR will be in the range from 160 to 320, for the KTC2025L-Y it will be in the range from 100 to 200.The complementary PNP transistor to the KTC2025L is the KTA1045L.The FMMT624 (SOT-23) and FMMT625 (SOT-23) is the SMD version of the KTC2025L transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the KTC2025L with the 2SD1220.