2SA500 Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -20 V
• Collector-Base Voltage, max: -30 V
• Emitter-Base Voltage, max: -5 V
• Collector Current − Continuous, max: -0.1 A
• Collector Dissipation: 0.25 W
• DC Current Gain (h_fe): 60 to 200
• Transition Frequency, min: 250 MHz
• Operating and Storage Junction Temperature Range: -65 to +175 °C
• Package: TO-18

Here is an image showing the pin diagram of this transistor.The 2SA500 transistor can have a current gain of 60 to 200. The gain of the 2SA500-O will be in the range from 60 to 120, for the 2SA500-Y it will be in the range from 100 to 200.Sometimes the "2S" prefix is not marked on the package - the 2SA500 might only be marked "A500".The complementary NPN transistor to the 2SA500 is the 2SC400.You can replace the 2SA500 with the 2SA499, BCY70 or BCY72.