The DuraComm RM2524 rack mount power supply for 19 in racks features power bloc switching modules which allow you to increase amperage and / or voltage plus adds N+1 redundancy for system integrity. This power rectifier uses 110 or 220 VAC input to produce 27.5 VDC output and features 25 A peak or 20 A continuous current. brbrThe typical 80% efficiency of this rack mount power supply produces extremely low heat. Thermostatically controlled fans provide cooling. The DuraComm volt switching power supply has electronic and fuse output protection.