Insulation material : PPORated Voltage : TUV 1000 DCRated Current : 20A-40ATest voltage : 6KV(50Hz,1Min)Contact material : copper, tin platedContact resistance : less than 0.5 m ohmDegree of protection : IP67Pin dimension : 4.0 MMCompatible Solar cable : 2.5/4.0 /6.0 mm⊃2; (14/12/10 AWG)