KTC4372 Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 150 V
• Collector-Base Voltage, max: 200 V
• Emitter-Base Voltage, max: 5 V
• Collector Current − Continuous, max: 0.05 A
• Collector Dissipation: 0.5 W
• DC Current Gain (h_fe): 70 to 240
• Transition Frequency, min: 120 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: SOT-89

Here is an image showing the pin diagram of this transistor.The KTC4372 transistor can have a current gain of 70 to 240. The gain of the KTC4372O will be in the range from 70 to 140, for the KTC4372Y it will be in the range from 120 to 240.The complementary PNP transistor to the KTC4372 is the KTA1660.You can replace the KTC4372 with the BF620 or BF622.