KTC4373 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: 0.8 A
• Collector Dissipation: 0.5 W
• DC Current Gain (h_fe): 80 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 KTC4373 transistor can have a current gain of 80 to 240. The gain of the KTC4373O will be in the range from 80 to 160, for the KTC4373Y it will be in the range from 120 to 240.The complementary PNP transistor to the KTC4373 is the KTA1661.You can replace the KTC4373 with the 2SC2881.