2SA954 Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -80 V
• Collector-Base Voltage, max: -80 V
• Emitter-Base Voltage, max: -5 V
• Collector Current − Continuous, max: -0.3 A
• Collector Dissipation: 0.6 W
• DC Current Gain (h_fe): 90 to 400
• Transition Frequency, min: 100 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-92

The 2SA954 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 2SA954 transistor can have a current gain of 90 to 400. The gain of the 2SA954-K will be in the range from 200 to 400, for the 2SA954-L it will be in the range from 135 to 270, for the 2SA954-M it will be in the range from 90 to 180.Sometimes the "2S" prefix is not marked on the package - the 2SA954 might only be marked "A954".The complementary NPN transistor to the 2SA954 is the 2SC2003.You can replace the 2SA954 with the 2SB560 or KSA709C.