What it is — MLX 42002 series position
The Molex 10-84-5041 is the 4-circuit member of the MLX 42002 series — a board-to-cable power header with a 0.250 inch (6.35 mm) pitch and a locking ramp that keeps the mating housing seated under vibration. Rated 12 A per circuit at 600 V with tin-plated phosphor bronze contacts on both the mating face and the solder tail (137.8 µin / 3.50 µm each side), the 084 series is built for direct power distribution in industrial panels and machine-tool harness runs where a durable, through-hole solder joint beats a press-fit or crimp for long-term field service.
What the ratings mean for your BOM fit
The 0.250 inch (6.35 mm) pitch sets the through-hole pad diameter and routing channel width on the PCB — circuit-count match alone does not guarantee footprint compatibility; verify the pad pattern against the MLX 42002 series drawing before committing. Four positions, all loaded, means this is a compact power tap — not a multi-signal bus. The 12 A per circuit rating governs the wire gauge you terminate to the mating half; stay within the connector's current derating curve at elevated ambient and you will not hit the temperature-rise ceiling of the PBT housing. Tin-on-tin plating at 3.50 µm handles reconnection duty better than thin flash tin. The tradeoff is higher contact resistance at first mate versus gold, which matters if the circuit is switching low-level signal rather than carrying steady-state power. The locking ramp is the primary retention feature — the mating housing snaps over it and resists pull-out better than a friction-fit header alone. For production harness runs, confirm the housing you specify has the matching locking ramp geometry; a standard friction-fit housing will sit loosely.
Where this class of connector goes
Board-to-cable power headers at 6.35 mm pitch sit in the upper current tier of panel interconnect — used to bring switched mains or motor branch power from the PCB out to the harness. The 600 V rating covers single-phase industrial line voltages, and the UL94 V-0 PBT housing is the baseline for enclosed equipment where flame containment is a compliance gate. Automotive and telecommunications panel builds use the same form factor for DIN-rail or chassis-mount power distribution nodes.