DF36A-50S-0.4V(51) from Hirose Electric Co Ltd is a 50-position rectangular receptacle designed for compact board-to-cable interconnect applications where fine pitch, secure retention, and reliable mating are important. As part of the rectangular connector category, it is well suited for space-constrained consumer, industrial, portable electronics, and embedded equipment designs that need a 0.40 mm mating pitch and SMT assembly. The metal cover, friction lock, and solder retention features support stable assembly and mechanical robustness in high-density layouts. Its LCP halogen-free insulation and UL94 V-0 flammability rating also make it relevant for designs that prioritize material performance and safety. The supplied status is listed as sufficient and the part status is active, which is a positive signal for ongoing procurement planning, although the lifecycle field itself is not formally confirmed beyond the provided status data. RoHS compliance information is not explicitly provided in the input, so engineers should verify current RoHS and REACH declarations directly with Hirose or authorized distribution documentation before release to production.