Enermax ATX 550 Mini-Redundant 1+1 Server Power Supply (EMA2V4550) Additional planar safety layer (DC UVP, OCP and OVP) on backplane-side after merging of outputs from each module Optimized thermal fan control for optimal cooling and noise performance Heavy-Duty Terminals 5.6A/pin enforced DIN 41612 connector for mission-critical systems Temperature range: Operating ambient 0~40; Storage ambient -40~70 PSU status monitor with 4-mode LED (Off / Stand-by / OK / Fail) and acoustic buzzer Full-scale electromagnetic filtering protecting the system