DF36-45P-0.4SD(51) from Hirose Electric Co Ltd is a 45-position rectangular plug in the DF36 series, designed for compact wire-to-board interconnect applications where fine pitch and reliable cable termination are important. With a 0.40 mm pitch, discrete wire support for 42–46 AWG, solder cable termination, and a latch holder fastening style, it is suited for dense electronic assemblies such as portable devices, miniaturized industrial equipment, compact consumer products, and space-constrained embedded systems. As an active Hirose connector series part, it is positioned for designs that need a small-footprint interconnect from an established connector manufacturer. Lifecycle status beyond the supplied listing is marked as unknown, so engineering and procurement teams should confirm long-term availability directly with the manufacturer or latest authorized channel data before locking it into new programs. RoHS compliance information is not explicitly provided in the supplied specifications, so compliance should be treated as information not available until verified through official datasheet or manufacturer documentation.