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.
Features
- UL 943 inverse time trip curve
- Advanced digital filtering algorithm
- Streamlined design
- Fixed 6mA (UL 943) trip level
- Quick install and configuration
- Equipped with conformally coated circuit boards to protect against corrosion and moisture
- Automatic self-test
Applications
- Agriculture
- Amusement parks
- Commercial kitchens
- Construction
- Food and beverage
- HVAC equipment
- Maintenance shops
- Manufacturing
- Marinas
- Mining sites
- Oil and gas
- Pools, spas, fountains, and water features
- Vehicle service centers
- Water/wastewater
Specifications
- 208V/120V, 240V/120V, 208V, and 240V voltage rating
- For use on 30A branch circuits and a maximum continuous FLA of 26A
- 10,000A short-circuit current rating
- IP 69K and NEMA 4X (outdoor), polycarbonate enclosure
- -35°C (-31°F) to 40°C (104°F), up to 66°C (151°F) with derating operating temperature range
- System type:
- Three-phase, 3-wire, and 60Hz
- Three-phase, 4-wire, and 60Hz
- Split-phase, 3-wire, and 60Hz
- Single-phase, 2-wire, and 60Hz
Circuit Diagram
Dimension Diagram
