Fold-Back Current Limiting - Protects from excessive current & continuous shorted output Crowbar over voltage protection Maintains regulation & low ripple at low line input voltage Heavy duty heat sink with chassis mount fuse The Astron RS series are continuous duty power supplies designed to withstand the rigors of heavy-duty or industrial use. RS-35A has a continous 25 amp rating with a 35 amp intermittent duty rating @ 13.8VDC. (50% duty cycle: 5 min on / 5 min. off).