Mersen Introduces the Class J Fused Switch
Mersen is excited to announce their new Class J Fused Switch! Mersen’s FS Series UL 98 Listed fused disconnect switch is designed for branch circuit protection using any UL Listed Class J fuse. Engineered for performance and convenience, the FS Series delivers the high interrupting capacity of Class J fuses (200kA SCCR) in the same footprint of a fuse holder. Occupying less space than a standard fuse holder and traditional disconnect switch combination, it enables more streamlined panel designs, ease of installation, and improved off-the-shelf distribution availability when time and convenience matter most, making it an ideal choice for panel builders.

