2N6431 Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 300 V
• Collector-Base Voltage, max: 300 V
• Emitter-Base Voltage, max: 6 V
• Collector Current − Continuous, max: 0.5 A
• Collector Dissipation: 0.5 W
• DC Current Gain (h_fe): 50 to 200
• Operating and Storage Junction Temperature Range: -65 to +200 °C
• Package: TO-18

Here is an image showing the pin diagram of this transistor.The complementary PNP transistor to the 2N6431 is the 2N6433.The KST42 (SOT-23), MMBTA42 (SOT-23) and PZTA42 (SOT-223) is the SMD version of the 2N6431 transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.