DF3EA-4P-2V(51) from Hirose Electric Co Ltd is a 4-position rectangular header in the DF3 series designed for compact board-to-board or cable interconnect applications. With a 2.00 mm pitch, surface-mount termination, shrouded 4-wall construction, and push-pull mating style, it fits designs that need stable connection performance in space-conscious industrial, consumer, and control electronics. The gold-plated mating interface, UL94 V-0 polyamide insulation, and operating range of -55°C to 105°C support use in demanding environments where connector reliability matters. Engineers may consider it for power and signal routing in embedded assemblies, compact controller boards, and harness-to-board interfaces. Lifecycle status is currently listed as unknown, so teams should verify long-term availability directly with the manufacturer or authorized sourcing partners before locking it into new designs. Formal RoHS compliance data is not provided in the supplied specifications, so compliance should be confirmed through the latest Hirose documentation before production release.