... 200A,400A DC circuit,for making orbreaking the circuit .Product is mainly used for control electric car,low voltage converter,engineering ... °C ,the 24h average value is less than +40°C ;When temperature is +40°C , relative air humidity is not exceeding 85%,with lower ... position altitude exceed 3000 meters,every rise 500 meters own 10% use, highest do not exceed 4500 meters;applicable duty; ...