What This Header Does That a Bare Pin Header Can't
The 1-284514-0: This is the board-mounted half of a Buchanan terminal block system — a shrouded (4 side) vertical header that accepts a plug-in mating connector. The shroud protects the pins from accidental shorting and guides the mating plug into alignment — a detail that matters when the header sits in a control cabinet where technicians reach in blind. Rated 11 A at 300 V (UL) with a UL94 V-0 PA66 housing, this header is built for the thermal and flame-resistance demands of industrial control panels and HVAC equipment.
Pitch, Position Count, and the Board Footprint
At 3.50 mm pitch, the 10-position header occupies a board area roughly 35 mm wide.
Current and Voltage — What the Ratings Actually Mean
The 11 A per contact rating at 300 V (UL) is the maximum continuous current at the rated voltage under UL test conditions. In a typical 20 °C ambient, the temperature rise at 11 A stays within the PA66 housing limit — but derate if the ambient exceeds 110 °C or if multiple adjacent circuits are fully loaded. For frequent disconnection or corrosive atmospheres, consider a gold-plated alternative in the same series.
This vertical shrouded header mates with Buchanan pluggable terminal blocks that accept screw-clamp or spring-clamp wire terminations. The green color is standard for terminal block headers in the Buchanan series — it's a visual identifier that the header belongs to the pluggable system, not a generic pin header.