Want to avoid guesswork? Speed your fuse replacements? Cut costly downtime? Choose Ferraz Shawmut's innovative SmartSpot indicator! SmartSpot's advanced material senses when a fuse opens and turns from silver to eye-catching red. And it stays red, so you can spot it quickly and safely with the power off. Plus, SmartSpot's unique solid-body design means there's nothing to compromise the fuse's structural integrity or reliability.

You'll find SmartSpot on our Amp-Trap 2000® Class J and Class RK1 fuses, and now, on our Tri-onic Class RK5 fuses! Tri-onic not only offers the time savings of SmartSpot, it features time delay to handle harmless inrush currents without nuisance opening. Next time you need an RK5 fuse to protect anything from motors and transformers to feeder and branch circuits, ask for Tri-onic — the only one in its class with SmartSpot. For complete fuse specifications, click on the links. To request a free sample of Tri-onic with SmartSpot, just submit the form below. Download the brochure (PDF 123k) Amp-Trap 2000 Class J (AJT) Fuses Amp-Trap 2000 Class RK1 (A2D andA6D) Fuses Tri-onic Class RK5 (TR and TRS) Fuses Request your free sample of Tri-onic with SmartSpot!