2SA1021-R Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -150 V
• Collector-Base Voltage, max: -150 V
• Emitter-Base Voltage, max: -6 V
• Collector Current − Continuous, max: -1.5 A
• Collector Dissipation: 20 W
• DC Current Gain (h_fe): 60 to 120
• Transition Frequency, min: 50 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 2SA1021-R transistor can have a current gain of 60 to 120. The gain of the 2SA1021 will be in the range from 60 to 320, for the 2SA1021-O it will be in the range from 100 to 200, for the 2SA1021-Y it will be in the range from 160 to 320.Sometimes the "2S" prefix is not marked on the package - the 2SA1021-R might only be marked "A1021-R".The complementary NPN transistor to the 2SA1021-R is the 2SC2481-R.You can replace the 2SA1021-R with the 2SA1408, 2SA1408-R, 2SB649A or 2SB649A-B.