... price,good quality, 3.Sample order is available S-100-48 dc power supply switching,DC power ... High temperature protection……temperature coefficient±0.03%°C(0~50°C)Start-up,upper,rentention time200ms,100ms,30msshock ... Ohmswork Temperature/humidity -10°C~+60°C,20%~90%RHStorage Temperature,temperature-20°C~+85°C,10%~95RHOutline dimension199*98* ... : the load from 0% to 100%. S-100-48 dc power supply switching