... :144V,DC current:400A 1.ApplicationGSZ1 series D.C. contactor is mainly used for DC operating voltage ... to 48V or 144 V,operating current respective to 100A,200A,400A DC ... using plug-in type,quick and convenient wiring;C-type and L-type mounting accessories for easy ... installation condition Ambient air temperature is -25°C~+40°C ,the 24h average value is less than + ...