The MS3474W20-41S is a miniature circular connector from the DEUTSCH AFD Series, qualified to MIL-DTL-26482 Series II, featuring a single-hole mount receptacle with 41 pin contacts in size 20. The connector is constructed with an aluminum alloy shell with olive drab cadmium over electroless nickel plating, copper alloy contacts selectively plated with 50 µin gold, and rigid plastic dielectric insulation with silicone seals for environmental protection. It supports Service Rating II with recommended operating voltage of 1000 VACRMS/1275 VDC at sea level and test voltage of 2300 VRMS at sea level, with reduced ratings at altitude (750 VRMS at 50,000 ft, 500 VRMS at 70,000 ft, and 200 VRMS at 110,000 ft). The connector features bayonet quick-connect coupling, rear release contacts, and is intermateable with MIL-DTL-26482 Series I connectors. Common applications include commercial aerospace, military aerospace, and military ground vehicles where harsh environmental conditions and reliable high-voltage signal transmission are critical.