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Littelfuse SB4000 Industrial Shock Block
Littelfuse SB4000 Industrial Shock Block is available in single-phase, split-phase, three-phase, and 4-wire systems with a 208V to 240V voltage rating for 30A branch circuits. This block is equipped with connections for a neutral wire that has built-in grounded-neutral protection per the UL 943 standard. The SB4000 shock block includes advanced harmonic filtering and an automatic self-test feature. This block consists of IP 69K/NEMA 4X and an outdoor-rated enclosure. The SB4000 shock block is available as a Class A Ground-Fault Circuit Interrupter (GFCI), allowing new construction or retrofit projects to meet NEC 210.8. This block is compliant with the UL 1998 software in programmable components standard. Typical applications include agriculture, amusement parks, commercial kitchens, construction, food and beverage, HVAC equipment, maintenance shops, manufacturing, mining sites, and marinas.