KTC3197 Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 25 V
• Collector-Base Voltage, max: 30 V
• Emitter-Base Voltage, max: 4 V
• Collector Current − Continuous, max: 0.05 A
• Collector Dissipation: 0.625 W
• DC Current Gain (h_fe): 20 to 200
• Transition Frequency, min: 300 MHz
• Noise Figure, max: 2.5 dB
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-92

The KTC3197 is manufactured in a plastic TO-92 case. When looking at the flat side with the leads pointed downward, the three leads emerging from the transistor are, from left to right, the emitter, collector, and base leads.
Here is an image showing the pin diagram of this transistor.You can replace the KTC3197 with the 2N3394.