2SA1907 Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -80 V
• Collector-Base Voltage, max: -80 V
• Emitter-Base Voltage, max: -6 V
• Collector Current − Continuous, max: -6 A
• Collector Dissipation: 60 W
• DC Current Gain (h_fe): 50 to 180
• Transition Frequency, min: 20 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-3PF

Here is an image showing the pin diagram of this transistor.The 2SA1907 transistor can have a current gain of 50 to 180. The gain of the 2SA1907-O will be in the range from 50 to 100, for the 2SA1907-P it will be in the range from 70 to 140, for the 2SA1907-Y it will be in the range from 90 to 180.Sometimes the "2S" prefix is not marked on the package - the 2SA1907 might only be marked "A1907".The complementary NPN transistor to the 2SA1907 is the 2SC5099.The BDP952 (SOT-223) is the SMD version of the 2SA1907 transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the 2SA1907 with the 2SA1860, 2SA1908, 2SA1909, 2SB1055, 2SB1056, 2SB1057 or FJAF4210.