The Molex 430452012 is a 20-position, dual-row header from the Micro-Fit 3.0 43045 series, designed for board-to-cable/wire interconnects. It uses a 0.118" (3.00mm) pitch on both the mating and row spacing, giving a compact footprint for a 20-circuit power or signal interface. The shrouded 4-wall housing with a locking ramp provides positive alignment and retention when mated with the matching Micro-Fit 3.0 receptacle, making it suited for automotive, industrial, medical, and telecom applications where vibration resistance and secure mating are required.
Rated 8 A per circuit at 600 V, this header carries enough headroom for moderate power distribution within a harness — think a 20-way power bus or mixed signal-power bundle where each contact handles a few amps. The 8 A figure is per-contact at the stated temperature rise; derate above 25°C ambient per the Micro-Fit 3.0 derating curve. The 600 V rating is line-to-line, which covers most industrial and automotive DC rails comfortably. The tin-on-tin contact system (100.0 µin tin on the mating side, tin on the solder post) is a workhorse choice for moderate mating cycles — typically 20 to 30 cycles before contact resistance starts to climb. The through-hole kinked-pin termination gives a solid solder joint that resists pull-out from cable strain. Operating temperature from -40°C to 105°C and a UL94 V-0 LCP housing mean this header can sit inside an automotive ECU or an industrial cabinet without flame or thermal concerns.
Mates with the Micro-Fit 3.0 receptacle housings (e.g., 43025 series) using the matching crimp terminals (43030 for 20-24 AWG). The 4-wall shroud protects the pins from bending during blind mating and prevents misalignment with the receptacle.