Molex, LLC part 51004-0400 is a rectangular connector component used in electronic interconnect systems where compact, reliable board-to-wire or wire-to-board connectivity is important. Engineers commonly evaluate parts in this category for consumer electronics, industrial controls, embedded devices, and other space-conscious assemblies that require consistent mating performance and streamlined harness integration. As a Molex connector, this part is generally positioned for designers seeking proven interconnect solutions from a widely recognized manufacturer. For procurement teams, it may also be relevant in maintenance, repair, and ongoing production support where connector continuity matters. The current lifecycle status for 51004-0400 is information not available, so design teams should confirm availability and long-term support directly with Molex or authorized distribution before committing to new production. RoHS compliance information is also not available in the provided data and should be verified against the latest manufacturer datasheet, declaration, or compliance documentation.