2SA671 Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -50 V
• Collector-Base Voltage, max: -50 V
• Emitter-Base Voltage, max: -4 V
• Collector Current − Continuous, max: -3 A
• Collector Dissipation: 25 W
• DC Current Gain (h_fe): 35 to 200
• Transition Frequency, min: 5 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-220

Here is an image showing the pin diagram of this transistor.The 2SA671 transistor can have a current gain of 35 to 200. The gain of the 2SA671-A will be in the range from 35 to 70, for the 2SA671-B it will be in the range from 60 to 120, for the 2SA671-C it will be in the range from 100 to 200.Sometimes the "2S" prefix is not marked on the package - the 2SA671 might only be marked "A671".The complementary NPN transistor to the 2SA671 is the 2SC1061.You can replace the 2SA671 with the BD204, BD242A, BD242B, BD242C, BD244A, BD244B, BD244C, BD304, BD798, BD800, BD802, BD808, BD810, BDT92, BDT92F, BDT94, BDT94F, BDT96, BDT96F, BDX78, D44C10, D44C11, D44C12, D44C7, D44C8, D44C9, D45C10, D45C11, D45C12, D45C7, D45C8 or D45C9.