The DCMM-21HA4S-N-A101 is a Combo D Series D-Subminiature connector offering mixed contact layouts for combined signal and power distribution. It features 17 contacts of size 20 rated for 7.5 A maximum and 4 contacts of size 8 rated for 40 A maximum, with a contact resistance of 10 milli Ohm maximum and dielectric withstanding voltage of 500 VAC at sea level. The connector supports wire gauges from AWG 8 to 26, operates across a temperature range of -55°C to +150°C, and is rated for 500 mating cycles. The shell is constructed from carbon steel with cadmium plating, the insulator is thermoplastic (PCT UL 94V-0) in black, and contacts are copper alloy with gold over nickel finish (Performance Class 1). This connector is ideal for industrial equipment, aerospace applications, and systems requiring reliable mixed-signal and high-current interconnections in demanding environments.