bsm1 20-1 series supplementary protector can be used in electric system which rated current from 3a to 50a, 50/60hz, voltage ac 250v and dc65v to protect the overload and short of circuit. it is largely used in industrial automation equipment, telecommunication equipment, communication power , ups and so on.
ambient air temperature range is : 0℃~ 40℃， and average temperature less than 35℃ in 24h
altitude of location is below 2000m
rated current: 2a-10a