2SA1285 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: -0.1 A
• Collector Dissipation: 0.9 W
• DC Current Gain (h_fe): 150 to 800
• 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 2SA1285 transistor can have a current gain of 150 to 800. The gain of the 2SA1285-E will be in the range from 150 to 300, for the 2SA1285-F it will be in the range from 250 to 500, for the 2SA1285-G it will be in the range from 400 to 800.Sometimes the "2S" prefix is not marked on the package - the 2SA1285 might only be marked "A1285".The complementary NPN transistor to the 2SA1285 is the 2SC3245.You can replace the 2SA1285 with the 2SA1285A.