DF40GB(1.5)-30DS-0.4V(51) from Hirose Electric Co Ltd is a DF40 series rectangular connector receptacle designed for compact board-to-board interconnect applications where fine pitch, reliable contact performance, and SMT assembly are important. With 30 positions, gold contacts, and tape-and-reel packaging for volume production, it is well suited to high-density consumer, industrial, portable, and embedded electronics. Engineers typically choose parts in this connector class for space-constrained designs that require dependable mating performance and automated assembly compatibility. Based on the available data, this part currently carries an unknown lifecycle status, so teams should confirm long-term availability directly with the manufacturer or authorized channel before locking it into new designs. RoHS compliance information is not explicitly provided in the submitted specifications, so compliance should be treated as information not available pending datasheet or manufacturer confirmation. For procurement planning, the listed limited supply status and estimated 25-week lead time suggest early sourcing and buffer stock planning may be prudent.