MDM-100SBSPTL39-A174 is a 100-contact Micro-D PCB socket (receptacle) connector designed for high-density board-to-board, board-to-cable, and cable-to-cable applications. It features a board straight (BS) termination type with a modified tail length (L39 = 0.375 inches / 9.52 mm), electroless nickel shell finish (A174), and liquid crystal polymer (LCP) insulator material. The connector provides 0.050-inch contact spacing and includes jackpost mounting hardware with #4-40 UNC-2B threads for secure PCB attachment. Key electrical specifications include dielectric withstanding voltage of 600 VAC at sea level, insulation resistance of 5,000 megohms minimum, and contact resistance of 8 milliohms maximum at 3 amps. This connector is ideal for flex circuitry, flat cable, and printed circuit board applications requiring high reliability and miniaturization.