What it is and where it sits in the series
The Molex 430452000 is the 20-position member of the Micro-Fit 3.0 43045 header series — a dual-row, right-angle through-hole connector with a 0.118-inch (3.00 mm) pitch throughout. The shrouding is four-wall, the fastening is a locking ramp, and the board-lock feature adds mechanical retention at the PCB interface. Contact material is brass alloy with tin plating on both the mating face and the solder post, at a thickness of 100 µin (2.54 µm) on the mating side — a full-tin finish suited to power and signal applications where gold is not required.
Ratings and what they mean for the build
At 8 A per circuit and 600 V, this is a power-rated header — the current ceiling is governed by the contact plating grade (tin, not gold), which limits cycle life and increases contact resistance over repeated mates compared to gold-plated siblings. The 100 µin (2.54 µm) mating-thickness is on the heavier side for tin, which improves solder wetting on the post side and gives more durable wear on the mating face for its rating class. The -40°C to 105°C operating window covers automotive and industrial environments; the UL94 V-0 LCP housing is self-extinguishing under fault conditions. The 0.290-inch (7.37 mm) insulation height and 0.125-inch (3.18 mm) post length define the board footprint and solder-zone depth — critical for keeping the right-angle mated profile within the z-height budget of a board-stacked or enclosed assembly. Row spacing matches the 0.118-inch (3.00 mm) pitch, so the board routing channels must be spaced accordingly. This is a board-to-cable header — it terminates to the PCB and receives the matchingMicro-Fit 3.0 receptacle housing on the cable side. The square pin shape mates with standard crimp-style terminals in the housing; the locking ramp holds the housing positively engaged once seated.
Sourcing and lifecycle
The 430452000 is Active and ROHS3 Compliant. It ships in tray packaging — confirm your line's feeder configuration handles tray presentation for through-hole parts, as this affects the pick-and-place profile and orientation before reflow. Quoted to order against BOM quantity; no official successor order code is listed, so the 20-position position count and the full-tin finish are the key match criteria for re-ordering or sourcing a cross-reference.