What it is and where it sits in the series
The Molex 430451211 is the 12-position member of the Micro-Fit 3.0 43045 series — a dual-row board-to-cable male header built for wire-to-board harness interconnects across automotive, industrial, medical, and telecom applications. The style is Board to Cable/Wire, the connector type is Header with male pin contacts, and all 12 positions are loaded.
Plating split and what it means for duty
The mating-side contacts carry gold plating at 30.0 µin (0.76 µm) over brass — that grade supports the reconnection cycles the locking ramp is designed for. The solder-post side uses tin at 100.0 µin (2.54 µm), which is standard for SMT reflow compatibility and long-term board-level reliability. The split plating is the key decision point: the gold on mating handles the plug interface durability; the tin post handles solder joint integrity.
Shrouding and the locking ramp
Ratings the buyer commits to
Pitch is 0.118" (3.00 mm) on a 0.118" row spacing — that sets the board footprint and the routing density. Current rating is 8 A per circuit; the UL94 V-0 LCP housing carries that rating across the full operating temperature range of -40°C to 105°C. Voltage rating is 600 V — that covers the majority of industrial and automotive bus rails at this pitch class. Mated insulation height is 0.290" (7.37 mm), which matters for z-height budgeting in dense board stacks.