DF40GB-48DP-0.4V(51) from Hirose Electric Co Ltd is a rectangular connector used where compact board-to-board or interconnect reliability is important in electronic assemblies. Within the Connectors, Interconnects > Rectangular Connectors category, parts like this are typically selected for dense PCB designs in industrial controls, consumer electronics, embedded hardware, and communication equipment. For design and sourcing teams, the main value of this component is Hirose brand recognition in precision interconnect solutions and its relevance in space-constrained systems that depend on stable mechanical and electrical connection performance. The supplied data includes conflicting fields, so some detailed specifications should be treated with caution and confirmed against the official Hirose datasheet. Lifecycle information for this part is currently unknown, which creates a moderate supply-chain review requirement before new design-in. RoHS compliance information is also not available in the provided data, so engineers and compliance teams should verify EU RoHS and REACH status directly with the manufacturer or authorized channel before production release.