Marathon Electric 6J30A3B Fuse Block Class J 3 Pole 30A 600V

The Marathon Electric 6J30A3B is a 3-pole Class J fuse block designed to hold Class J fuses for three-phase protection. Rated at 30A per pole and up to 600V, this fuse holder provides a centralized protection point in industrial panels and equipment enclosures. The block accepts standard Class J fuses, offering straightforward installation and simple replacement in motor control centers, switchgear, and power-distribution panels that require Class J protection. Each of the three poles is wired to a separate fuse position, enabling independent protection across three phases while sharing a common mounting footprint. Built for reliable operation in demanding electrical environments, the 6J30A3B supports typical industrial voltages and current levels associated with Class J safety ratings, and its 3-pole Class J fuse block configuration is specified for 600V, 30A Class J arrangements in control and power distribution systems.