Mersen® | Class J Fuses & Current-Limiting Circuit Protection Canada

Deliver space-saving, high-interrupting protection for motor branch circuits, mains, and power electronics with industrial Class J fuses from Mersen in Canada. Engineered to combine high current-limiting performance with compact physical dimensions, Mersen Class J fuses provide rapid fault interruption to minimize downstream equipment damage and arc-flash hazard levels. Manufactured to satisfy strict CSA, UL 248-8, and IEC safety standards, these fuses ensure robust performance and full electrical code compliance across commercial and industrial control installations.

Our inventory features authentic Mersen Class J fuses, including Amp-Trap® AJT time-delay fuses with SmartSpot® visual blown-fuse indication, A4J fast-acting fuses for non-inductive loads, and HSJ high-speed hybrid fuses optimized for semiconductor and VFD protection. Featuring 600V ratings, 200kA interrupting capacities, and rejection-style physical dimensions that prevent fuse substitution errors, Mersen Class J fuses provide ultimate short-circuit protection for switchboards, panelboards, and industrial motor control centers.

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