2SA1018 Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -200 V
• Collector-Base Voltage, max: -250 V
• Emitter-Base Voltage, max: -5 V
• Collector Current − Continuous, max: -0.07 A
• Collector Dissipation: 0.75 W
• DC Current Gain (h_fe): 60 to 220
• Transition Frequency, min: 50 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-92

The 2SA1018 is manufactured in a plastic TO-92 case. When looking at the flat side with the leads pointed downward, the three leads emerging from the transistor are, from left to right, the emitter, collector, and base leads.
Here is an image showing the pin diagram of this transistor.The 2SA1018 transistor can have a current gain of 60 to 220. The gain of the 2SA1018Q will be in the range from 60 to 150, for the 2SA1018R it will be in the range from 100 to 220.Sometimes the "2S" prefix is not marked on the package - the 2SA1018 might only be marked "A1018".The complementary NPN transistor to the 2SA1018 is the 2SC1473.The BF623 (SOT-89) and BF823 (SOT-23) is the SMD version of the 2SA1018 transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the 2SA1018 with the 2SA1370, 2SA1371, 2SA1624, 2SA1767, 2SA879, 2SB1221 or KTA1279.