2SA636 Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -45 V
• Collector-Base Voltage, max: -70 V
• Emitter-Base Voltage, max: -5 V
• Collector Current − Continuous, max: -3 A
• Collector Dissipation: 10 W
• DC Current Gain (h_fe): 40 to 250
• Transition Frequency, min: 45 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-202

Here is an image showing the pin diagram of this transistor.The 2SA636 transistor can have a current gain of 40 to 250. The gain of the 2SA636-K will be in the range from 120 to 250, for the 2SA636-L it will be in the range from 80 to 160, for the 2SA636-M it will be in the range from 50 to 100, for the 2SA636-N it will be in the range from 40 to 60.Sometimes the "2S" prefix is not marked on the package - the 2SA636 might only be marked "A636".The complementary NPN transistor to the 2SA636 is the 2SC1098.You can replace the 2SA636 with the 2SA636A.