2SA1220 Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -120 V
• Collector-Base Voltage, max: -120 V
• Emitter-Base Voltage, max: -5 V
• Collector Current − Continuous, max: -1.2 A
• Collector Dissipation: 20 W
• DC Current Gain (h_fe): 60 to 320
• Transition Frequency, min: 175 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 2SA1220 transistor can have a current gain of 60 to 320. The gain of the 2SA1220-P will be in the range from 160 to 320, for the 2SA1220-Q it will be in the range from 100 to 200, for the 2SA1220-R it will be in the range from 60 to 120.Sometimes the "2S" prefix is not marked on the package - the 2SA1220 might only be marked "A1220".The complementary NPN transistor to the 2SA1220 is the 2SC2690.You can replace the 2SA1220 with the 2SA1021, 2SA1220A, 2SB649, KSA1220 or KSA1220A.