KSA539R 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 80
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-92
• Electrically Similar to the Popular 2SA539R transistor

The KSA539R 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 KSA539CR transistor (with suffix "C") is the center collector version of the KSA539R.
Here is an image showing the pin diagram of this transistor.The KSA539R transistor can have a current gain of 40 to 80. The gain of the KSA539 will be in the range from 40 to 240, for the KSA539O it will be in the range from 70 to 140, for the KSA539Y it will be in the range from 120 to 240.The complementary NPN transistor to the KSA539R is the KSC815R.The 2SA1483 (SOT-89), 2SA1483-R (SOT-89), FJX733 (SOT-323) and FJX733R (SOT-323) is the SMD version of the KSA539R transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.The 2SA539R is the TO-92 version of the KSA539R.You can replace the KSA539R with the 2SA539, 2SA539R, 2SA708, 2SA708R, BC527, BC527-6, BC528, BC528-6, KSA708, KSA708R, PN2904A, PN2906A or ZTX552.