Amphenol Industrial RADSOK Helios H4 Solar Connectors provide solutions for all segments of the solar electric system while featuring a 52A rating. The H4 connectors provide efficient, low-loss power transfer through precision machined contacts utilizing RADSOK technology. The H4 Series offers high reliability for both thin-film and crystalline silicon technologies. A quick, easy, and safe NEC 2008-compliant locking system with secure snap-lock mating makes the H4 one of the most advanced solar connectors available. The Helios H4 series meets NEC 2008 standards as-is, with no additional components needed. With a 25-year UV and ozone resistance, the connectors meet waterproof IP67 standards and withstand hydrolysis, oil, chemicals, abrasion, corrosion, and extreme temperature. Amphenol Industrial H4 Solar Connectors are compatible with one another and ready for field assembly with no small parts. The RoHS-compliant connectors meet UL, TUV, IEC/CEI, NEC, and DIN V standards. The field-in