BD139 and BD140 Complementary Transistors

bd139-bd140

This pair is my favorite when driving small solenoids or motors. SOT-32 and 12 Watts on Heatsink. This means any small solenoid, relay or DC motor can be controlled with this. I would use it upto 24V DC and max of 1A for applications of full on and full off. The pair is complementary NPN and PNP and well matched, this makes it suitable for the push-pull final stages of mini amps or small motor drivers.



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