What it is
The 430451424: Through-hole kinked-pin termination with board lock and board guide features holds the header coplanar during wave or hand soldering; the four-wall shroud and locking ramp on the receptacle side lock the mated pair against vibration in automotive and industrial harness environments.
What the ratings mean
The 8 A per circuit rating at 600 V gives solid headroom for board-to-cable power distribution — the current ceiling is set by the brass contact material and the 3.00 mm pitch geometry, not by the voltage, so the 600 V rating is the power-range envelope, not a constraint on signal use. Tin-tin plating across the full contact (mating and post) signals high-cycle durability — tin wipes and rebounds better under repeated mating than a gold-flash finish. If the application is a low-cycle, high-integrity signal link, the gold-plated sibling in this series carries a different plating grade on the mating side only; check the series listing for the alternate plating code. Insulation height is 0.390" (9.91 mm) — relevant for clearance planning in dense assemblies. The dual-row layout at 3.00 mm pitch sits at the upper end of the 3 mm pitch family, so routing density between rows needs the standard 3.00 mm row-spacing clearance. Operating range -40°C to 105°C covers automotive thermal cycles and industrial environments; UL94 V-0 flammability rating means the housing material (glass-filled LCP) passes the vertical flame test for enclosed equipment.
Where the class is used
Micro-Fit 3.0 is a standard board-to-cable power interconnect in automotive harness assemblies, industrial automation, medical equipment, and telecommunications infrastructure — the locking ramp and shrouding keep the connection seated under vibration and cable pull stress that would unseat an unshrouded header.