KSA539 Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -45 V
• Collector-Base Voltage, max: -60 V
• Emitter-Base Voltage, max: -5 V
• Collector Current − Continuous, max: -0.2 A
• Collector Dissipation: 0.4 W
• DC Current Gain (h_fe): 40 to 240
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-92
• Electrically Similar to the Popular 2SA539 transistor

The KSA539 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. The KSA539C transistor (with suffix "C") is the center collector version of the KSA539.
Here is an image showing the pin diagram of this transistor.The KSA539 transistor can have a current gain of 40 to 240. The gain of the KSA539O will be in the range from 70 to 140, for the KSA539R it will be in the range from 40 to 80, for the KSA539Y it will be in the range from 120 to 240.The complementary NPN transistor to the KSA539 is the KSC815.The 2SA1483 (SOT-89) and FJX733 (SOT-323) is the SMD version of the KSA539 transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.The 2SA539 is the TO-92 version of the KSA539.You can replace the KSA539 with the 2SA539, 2SA708, BC527, BC528 or KSA708.