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This solar MC4 connector is specifically designed for connecting photovoltaic solar systems with high mechanical requirements and extreme weather conditions. For permanent installations. Specifications: Rated Voltage: TUV 1000V DC / UL 600V DC Rating Current 20A~25A Suitable cable cross sections 2.5mm2~6.0mm2 / 14AWG~10AWG Pin dimension: 4.0mm Proof voltage: DC 8KV(1Min) Pollution: degree 2 Protection class: Class II Contact Material: Copper, tin-plated Contact Resistance: 5mW Connector Material: PPO Degree of Protection IP: IP67(IEC 60529) Withdrawal Force< 50N Insertion Force>50N Temperature Range: -40℃~+85℃ Flame Class: UL94-V0 Package: 10 pairs of MC4 Male/Female Solar Panel cable Connectors 10 pairs of solar connector pins (male &female)