KTC4374 Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 80 V
• Collector-Base Voltage, max: 80 V
• Emitter-Base Voltage, max: 5 V
• Collector Current − Continuous, max: 0.4 A
• Collector Dissipation: 0.5 W
• DC Current Gain (h_fe): 70 to 240
• Transition Frequency, min: 100 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 KTC4374 transistor can have a current gain of 70 to 240. The gain of the KTC4374O will be in the range from 70 to 140, for the KTC4374Y it will be in the range from 120 to 240.The complementary PNP transistor to the KTC4374 is the KTA1662.You can replace the KTC4374 with the 2SC3438 or BCX56.