DF3EA-4P-2V(21) 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 where secure mating and stable SMT assembly are important. With a 2.00 mm pitch, shrouded 4-wall construction, push-pull fastening, solder termination, and solder retention feature, it is well suited for industrial controls, consumer electronics, power distribution subassemblies, and embedded equipment requiring reliable signal or low-power connection points. The connector supports operating temperatures from -55°C to 105°C and carries a 250VAC rating, making it relevant for designs exposed to broad environmental conditions. Lifecycle status is currently listed as unknown, so design teams should confirm long-term availability with the manufacturer before committing to new programs. RoHS compliance information is not explicitly provided in the supplied specifications; engineers should verify RoHS and REACH status through the official datasheet, manufacturer declarations, or authorized sourcing documentation before production release.