The DCM-21WA4S-A197 is a Combo D-subminiature solder cup receptacle designed for versatile I/O applications. It features a 21WA4 contact arrangement, which includes 17 size 20 signal contacts and 4 empty size 8 cavities for customization with high power, high voltage, or coaxial contacts. The signal contacts are rated for 7.5 A and can withstand a dielectric voltage of 1250 VAC at sea level. This connector is built with a robust, RoHS-compliant tin-nickel plated carbon steel shell and a UL 94V-0 rated black polyester insulator, operating reliably across a temperature range of –55°C to 125°C. The combination of standard signal contacts and customizable cavities makes it ideal for space-optimized designs in industrial, aerospace, and telecommunications equipment requiring mixed signal and power or RF connections.