2SA539 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

The 2SA539 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 2SA539 transistor can have a current gain of 40 to 240. The gain of the 2SA539O will be in the range from 70 to 140, for the 2SA539R it will be in the range from 40 to 80, for the 2SA539Y it will be in the range from 120 to 240.Sometimes the "2S" prefix is not marked on the package - the 2SA539 might only be marked "A539".The complementary NPN transistor to the 2SA539 is the 2SC815.The 2SA1483 (SOT-89) and FJX733 (SOT-323) is the SMD version of the 2SA539 transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.The KSA539, KTA539 is the TO-92 version of the 2SA539.You can replace the 2SA539 with the 2SA708, BC527, BC528, KSA539 or KSA708.