KSP43 Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 200 V
• Collector-Base Voltage, max: 200 V
• Emitter-Base Voltage, max: 6 V
• Collector Current − Continuous, max: 0.5 A
• Collector Dissipation: 0.625 W
• DC Current Gain (h_fe): 40
• Transition Frequency, min: 50 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-92

The KSP43 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, base, and collector leads.
Here is an image showing the pin diagram of this transistor.The complementary PNP transistor to the KSP43 is the KSP93.The KST43 (SOT-23) is the SMD version of the KSP43 transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the KSP43 with the 2N6515, 2N6516, KSP42, MPSA42, MPSA43, MPSW42, MPSW42G or ZTX457.