What it is
The Molex 91999-0478 is the 2-circuit member of the 91999 series — a right-angle RAST 5 vertical header in 5.00 mm pitch, designed for through-hole solder termination on a board. Silver-plated brass contacts carry 16 A per circuit at 250 V, and the 78.7 µin (2.00 µm) plating thickness on the contact surface is the key to that current rating — silver at 2 µm gives lower contact resistance under load than a thin gold flash, which is why the 91999-0478 sits at the power end of this series. A latch-lock fastening type and a board-guide feature work together: the latch locks the mating housing in place and the guide ribs align the housing during assembly so the contacts seat without bending. The PA66 nylon body is halogen-free and rated from -20°C up to 120°C, which covers the thermal envelope for most industrial automation board-level interconnects.
Sourcing and compliance
The 91999-0478 is listed Active in production — sourced to order against BOM quantity via RFQ. No official L* successor order code is on record for this 2-position member. RoHS non-compliant: if your assembly carries an environmental mandate, confirm whether a RoHS-compliant silver-finish variant exists in the 91999 series or whether a tin-plated equivalent in a compatible pitch will meet the current and duty requirements before specifying.