What this 3-position shrouded header does in a terminal block assembly
The 284512-3 is a 3-position, right-angle header from the TE Buchanan series, designed to mate with a 3.50mm pitch plug — the shrouded (4 side) housing guides the plug into alignment and protects the male pins from accidental shorting during handling. Rated 11 A at 300 V per UL, it handles typical signal and moderate power loads in industrial control panels, PLC I/O modules, and sensor junction boxes.
At 0.138" (3.50mm) pitch, this header fits the standard 3.5mm terminal block spacing — confirm your mating plug uses the same pitch before committing the BOM line. Compared to the 4-position sibling 1-2213934-1 (also Buchanan, same pitch and current rating), this 3-position variant is the choice when the circuit count is exactly three — no unused pins, no extra board space wasted.
It is RoHS3 compliant, meeting the current EU directive for lead-free and restricted-substance content.