KTC4372O 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 140
• 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 KTC4372O transistor can have a current gain of 70 to 140. The gain of the KTC4372 will be in the range from 70 to 240, for the KTC4372Y it will be in the range from 120 to 240.The KTC4372O transistor is marked as "AO".The complementary PNP transistor to the KTC4372O is the KTA1660O.You can replace the KTC4372O with the BF620 or BF622.