BD140 is a medium power bipolar junction transistor that is mainly used for switching and amplification purpose. It belongs to the PNP transistor category and comes in the TO-126 package. It is made up of silicon material with collector current 1.5A which indicates it can support loads under 1.5A. The collector-base and collector-emitter terminal voltages are 80V and emitter-base voltage is 5V which is used to bias the transistor.In this post, I’ll be detailing the complete introduction to BD140 covering pinout, working, absolute maximum ratings, physical dimensions, alternatives, and applications.Let’s jump right in.
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