What is this the 3 leads have me confused.

MisterBill2

Joined Jan 23, 2018
19,453
R2 and R3 in one package :


View attachment 319783

Or, "RE" , or "R" :

View attachment 319784
OK, and it is also used in some of the modern amplifier circuits as well. I had not stopped long enough to consider that part, It is one way to start out with closely matched transistors and assure that replacements would also be closely matched. It also removes one assembly step during production, which is a cost reduction benefit. It might even allow better PCB routing.
 
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