The TE Connectivity Buchanan 1546927-3 is a 3-circuit barrier strip terminal block with a 0.325" (8.26mm) pitch, designed for through-hole PCB mounting. It's the sort of block you'd find on a power supply board, a motor controller, or an industrial control panel where you need a field-serviceable screw termination that stays put. The three-wall (tri) barrier construction keeps wire strands from bridging between terminals — a real help when you're landing 14 AWG in a tight cabinet. Rated 15A at 300V, it handles the kind of current that runs a small motor or a DC power rail, not just signal-level loads.
The 0.325" (8.26mm) pitch is the center-to-center spacing between terminals — measure your existing PCB hole pattern against it before you commit. The block accepts 14-22 AWG wire, which covers most panel wiring from a 14 AWG power feed down to a 22 AWG signal tap.
The Cover: Not Every Barrier Block Ships With One
This 1546927-3 includes a cover — listed as a feature. That cover snaps over the screw terminals to prevent accidental contact with live conductors and keeps dust off the connections. If you're replacing a block in a panel that had a cover, this one matches that requirement out of the box. If your application doesn't need one, you still get it; it's not a separate order line.