2SA1204 Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -30 V
• Collector-Base Voltage, max: -35 V
• Emitter-Base Voltage, max: -5 V
• Collector Current − Continuous, max: -0.8 A
• Collector Dissipation: 0.5 W
• DC Current Gain (h_fe): 100 to 320
• Transition Frequency, min: 120 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: SOT-89

Here is an image showing the pin diagram of this transistor.The 2SA1204 transistor can have a current gain of 100 to 320. The gain of the 2SA1204-O will be in the range from 100 to 200, for the 2SA1204-Y it will be in the range from 160 to 320.Sometimes the "2S" prefix is not marked on the package - the 2SA1204 might only be marked "A1204".The complementary NPN transistor to the 2SA1204 is the 2SC2883.You can replace the 2SA1204 with the 2SA1203, 2SB1122, 2SB1123, 2SB1124, 2SB766A, KTA1663 or KTA1664.