2SA1124 Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -150 V
• Collector-Base Voltage, max: -150 V
• Emitter-Base Voltage, max: -5 V
• Collector Current − Continuous, max: -0.05 A
• Collector Dissipation: 1 W
• DC Current Gain (h_fe): 130 to 450
• Transition Frequency, min: 200 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-92MOD

Here is an image showing the pin diagram of this transistor.The 2SA1124 transistor can have a current gain of 130 to 450. The gain of the 2SA1124-R will be in the range from 130 to 220, for the 2SA1124-S it will be in the range from 185 to 330, for the 2SA1124-T it will be in the range from 260 to 450.Sometimes the "2S" prefix is not marked on the package - the 2SA1124 might only be marked "A1124".The complementary NPN transistor to the 2SA1124 is the 2SC2632.You can replace the 2SA1124 with the 2SA1123, BF421, BF423 or KTA1279.