... 200A,400A DC circuit,for making orbreaking the circuit .Product is mainly used for control electric car,low voltage converter,engineering ... mechanism of direct-acting,contact for double breakpoint bridge contact;The main circuit wiring should match circular or peep mouth ... air temperature is -25°C~+40°C ,the 24h average value is less than +40°C ;When temperature is +40°C , relative air humidity is ...