2SA909 Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -200 V
• Collector-Base Voltage, max: -200 V
• Emitter-Base Voltage, max: -6 V
• Collector Current − Continuous, max: -15 A
• Collector Dissipation: 150 W
• DC Current Gain (h_fe): 30
• Transition Frequency, min: 10 MHz
• Operating and Storage Junction Temperature Range: -65 to +150 °C
• Package: TO-3

Here is an image showing the pin diagram of this transistor.Sometimes the "2S" prefix is not marked on the package - the 2SA909 might only be marked "A909".The complementary NPN transistor to the 2SA909 is the 2SC1586.You can replace the 2SA909 with the 2SB723, 2SB723-A, 2SB723-B, 2SB723-C, MJ11019, MJ11021 or MJ11021G.