MDM-51PBR-A174 is a 51-contact Micro-D PCB connector plug featuring right angle (BR) board termination and an electroless nickel shell finish. It utilizes a standard MDM metal shell with Liquid Crystal Polymer (LCP) insulator material and provides high density with 0.050" contact spacing. Key dimensions include A Max of 1.875 inches (47.63 mm), B of 1.600 inches (40.64 mm), and C of 1.215 inches (30.86 mm). The connector is designed for use with flex circuitry, flat cable, printed circuit boards, and multi-layer boards, offering high reliability in board-to-board, board-to-cable, and cable-to-cable applications. It meets rigorous environmental specifications including thermal shock from -55°C to +125°C, vibration resistance up to 20 G's, and dielectric withstanding voltage of 600 VAC at sea level.