Ferraz Shawmut’s TRS400R Tri-Onic Class RK5 time-delay fuse is a 400 A, 600 V (AC/DC) current-limiting protection device designed to shield motor and transformer circuits from faults while tolerating inrush currents. It belongs to the TRS series of time-delay fuses, offering slow-blow protection for loads with high startup surges. The TRS400RID variant adds a SmartSpot visual indicator on the blade for quick at-a-glance status during maintenance.
