A quick look at the BD679 datasheet reveals that the pinout is defined as (looking at the front face, left to right). However, its sibling, the BD677 (a PNP type), typically flips this arrangement to Emitter, Collector, Base .
Note: Always refer to the official manufacturer’s datasheet (e.g., STMicroelectronics, ON Semiconductor, or equivalent) for absolute maximum ratings and electrical characteristics specific to your production part number and date code. bd679 datasheet
The BD679 is a testament to practical engineering. It isn't the fastest, and it isn't the most efficient, but it is reliable, robust, and distinctively simple to use. The next time you see "BD679" printed in white text on a black chip, take a moment to appreciate the two transistors working in tandem inside, doing the heavy lifting that makes the rest of the circuit possible. A quick look at the BD679 datasheet reveals