What this is
The Molex 75556-5100 is a single-position male-blade power plug in the EXTreme PowerMass 75556 series — a family built around high-current bus-bar and cable-to-board interconnects where a single circuit must carry 150 A. It terminates via through-hole right-angle solder and mounts flush to the PCB edge for a direct power feed into the board plane. The overmold assembly gives the blade body its black colour and the UL94 V-0 flammability rating that qualifies it for enclosed-power applications.
What the ratings mean
The 150 A current rating is the defining spec — this is not a signal header, it is a discrete power blade sized for a single high-amperage conductor or bus-bar tab. The 600 V rating sets the insulation envelope; the two together place this squarely in industrial power distribution, not control-level wiring. The gold plating at 30.0 µin (0.76 µm) on the mating interface is the key durability call: it resists corrosion under repeated mating cycles at full current better than tin plating would, and it maintains low contact resistance through the blade interface even under thermal cycling. Operating range is -40°C to 105°C, wide enough for most equipment enclosures without derating at the connector itself.
Where this class is used
EXTreme PowerMass blade connectors are used as cable-to-board power feeds in motor drives, server PSU brick assemblies, industrial automation cabinets, and EV charging infrastructure — anywhere a single high-amperage circuit needs a detachable, field-replaceable power junction. The single-position format is typically paired with a matching female receptacle or blade-receiving housing on the board side, and the overmold body provides the mechanical strain relief for the cable termination. The UL94 V-0 rating is what allows it to live inside a closed power enclosure without additional sleeving.