KTC4378GR Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 60 V
• Collector-Base Voltage, max: 80 V
• Emitter-Base Voltage, max: 5 V
• Collector Current − Continuous, max: 1 A
• Collector Dissipation: 0.5 W
• DC Current Gain (h_fe): 160 to 320
• Transition Frequency, min: 150 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 KTC4378GR transistor can have a current gain of 160 to 320. The gain of the KTC4378 will be in the range from 100 to 320, for the KTC4378Y it will be in the range from 100 to 200.The KTC4378GR transistor is marked as "TG".You can replace the KTC4378GR with the 2SD1615A or 2STF1360.