The Molex 430451814 is an 18-circuit, dual-row header from the Micro-Fit 3.0 43045 series, designed for board-to-wire power and signal interconnects. It uses a 3.00 mm pitch on both the pin-to-pin and row spacing, which gives enough creepage for the 600 V rating without forcing an oversized board footprint. The header is through-hole mounted with kinked solder tails for retention during wave soldering, and the 4-wall shrouding protects the male pins from damage during handling and blind mating. A built-in board guide on the housing aids alignment during PCB insertion, reducing the risk of bent pins on the assembly line.
Key Ratings and What They Mean
Rated 8 A per circuit at 600 V, this header carries bus-level current per pin — sized for a power distribution rail inside a harness, not a low-current signal line. The 30.0 µinch gold plating on the mating surface is a robust industrial grade, supporting repeated mating cycles in automotive or medical equipment where field service is expected. The tin-plated solder tails (100.0 µinch) are standard for through-hole soldering. The UL94 V-0 liquid crystal polymer housing and -40°C to 105°C operating range suit it for under-hood automotive and industrial cabinet environments where thermal cycling and flammability ratings are specified.
Mating and Termination
This header mates with the matching Micro-Fit 3.0 receptacle housing (sold separately) using a positive locking ramp for vibration-resistant connection. The kinked-pin solder termination provides a press-fit retention in the plated through-hole before soldering, which helps hold the component in place during board handling. For a complete wire-to-board connection, pair it with the appropriate Micro-Fit 3.0 crimp terminals and receptacle housing.