The BD677 is a high-gain NPN Darlington power transistor in a TO-126 package. This detailed guide explains the BD677 pinout, datasheet, working principle, and equivalents for audio, switching, and control applications. Introduction to BD677 NPN Transistor The BD677 is a high-gain NPN Darlington power transistor designed for medium-power amplification and switching. It is part of […]
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