The 252129-75 is an MCX right-angle PCB board receptacle jack designed for 75 ohm RF applications. It features a brass body with gold plating, a PTFE insulator, and beryllium copper contact pins with gold finish, ensuring reliable electrical performance and corrosion resistance. The connector has 3.94 mm mounting legs and is designed for standard PCB mounting with 4 mounting holes of 0.92 mm square dimensions spaced 5.08 mm apart. This connector is commonly used in RF and video signal applications where compact right-angle board mounting and impedance matching to 75 ohm systems are required, such as in broadcast equipment, cable television systems, and professional video infrastructure.