Hoffman Enclosures HB33421 Class J Enclosures

The Hoffman WOHNER HB33421 is a 3-pole, 30A QCC Class J fuse holder enclosure designed to house and protect Class J fuse assemblies in low-voltage control and power distribution panels. It is commonly used in industrial switchgear, motor control centers, and automation panels that require enclosed fuse protection and reliable power distribution for branch circuits, motors, transformers, and industrial equipment. Key specifications include a 600V AC rating, busbar-mounted fuse holder, and top or bottom box terminal connections, compatible with 21x57mm Class J fuses, with a short-circuit rating of 200 kA RMS symmetrical. The enclosure supports 60Classic Busbar Systems and offers busbar/panel mounting for flexible integration into existing builds. Applications span switchgear, MCC panels, industrial automation, and power distribution projects where modular busbar-mounted distribution and Class J protection are needed. Common replacements listed for this part include WOHNER 33421000, Siemens Class J Fuse Holder Assembly, and ABB Class J Fuse Holder Enclosure, reflecting its role within broader Class J protection ecosystems.