What it is
The 43255-0099: The four-wall shroud and integral board guide feature align and retain the mating interface, while the locking ramp adds mechanical engagement under shock and vibration — a configuration common in automotive wire-harness and industrial power-distribution board assemblies.
Key ratings and what they mean
Voltage: 600 V makes this suitable for higher-potential bus rails in automotive and industrial control panels — confirm the working voltage against the applicable derating curve for your altitude and pollution degree. Current: 9 A per circuit is the per-contact ceiling at the housing's rated temperature rise. The tin-plated phosphor bronze contact beam carries the current; the locking ramp fastening type helps maintain contact normal force throughout the connector lifecycle. Plating: full tin on both mating and solder-post surfaces at 137.8 µin (3.50 µm) thickness — adequate for high-cycle industrial mating. Housing: natural PBT/polyester rated UL94 V-0 with 0.550" insulation height, giving meaningful standoff from the board surface in under-hood or control-enclosure environments. Operating range: -55 °C to 105 °C covers the full automotive climate band; derate current above the rated temperature per the product thermal curve.
Where it is used
The MLX 43255 series is specified in automotive wire-to-board and board-to-cable harness segments — the 600 V rating and shrouded four-wall body suit in-cabin power-distribution modules and engine-adjacent control boards where vibration and accidental contact protection are required. General-purpose and industrial applications use the same footprint for motor-drive I/O boards and power-supply card cages where the board-guide and locking-ramp features reduce insertion mis-match risk during field service.