2SA1209 Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -160 V
• Collector-Base Voltage, max: -180 V
• Emitter-Base Voltage, max: -5 V
• Collector Current − Continuous, max: -0.14 A
• Collector Dissipation: 10 W
• DC Current Gain (h_fe): 100 to 400
• Transition Frequency, min: 150 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-126

Here is an image showing the pin diagram of this transistor.The 2SA1209 transistor can have a current gain of 100 to 400. The gain of the 2SA1209-R will be in the range from 100 to 200, for the 2SA1209-S it will be in the range from 140 to 280, for the 2SA1209-T it will be in the range from 200 to 400.Sometimes the "2S" prefix is not marked on the package - the 2SA1209 might only be marked "A1209".The complementary NPN transistor to the 2SA1209 is the 2SC2911.You can replace the 2SA1209 with the 2SA1210, 2SA1248, 2SA1249, 2SA1477 or 2SA1507.