New compact GFCI device offers protection for systems with a maximum full load current up to 30A.
ROSEMONT, Ill, May 15, 2026 -- Littelfuse公司 (NASDAQ: LFUS), a leader in developing smart solutions that enable safe and efficient electrical energy transfer, expands its Industrial Shock Block Series to help protect workers from electrical shock for loads up to 30A. The SB4000 is available for use in single-, split- and three-phase systems as well as 4-wire systems from 208 to 240V.
SB4000 models equipped with connections for a neutral wire have built-in grounded-neutral protection per the UL 943 standard. The standard enclosure is IP 69K/NEMA 4X and outdoor rated making it suitable for all industrial environments including high temperature washdown used in food production applications. The SB4000 is panel agnostic making it perfect for remodel and retrofit applications in commercial kitchens, HVAC, and residential pool & spa applications. It includes advanced harmonic filtering, an automatic self-test feature, and is compliant to the UL 1998 Software in Programmable Components standard.
"In industrial and OEM environments, where 30-amp circuits power critical equipment, GFCI protection isn't optional-it's essential, especially where moisture and heavy-duty equipment intersect," stated Tim Piemonte, Product Manager at Littelfuse. "The compact, cost-effective Shock Block SB4000 is a frontline defense against electrical hazards instantly disconnecting power in the event of a ground fault, and is a proactive step toward compliance, reliability and most importantly worker safety."
Other feature and benefits include:
- UL 943 inverse time detection circuit protects people and the probability of nuisance tripping
- Fixed 6 mA trip level meets UL 943 GFCI personnel protection requirements
- Streamlined design eliminates flying leads and offers flexible positioning for knockouts
- Conformally coated circuit boards protect against corrosion and moisture
- Quick installation and easy configuration save time and money
The UL Listed* SB4000 Shock Block series is a Class A GFCI available in 208 - 240V allowing maintenance or retrofit projects to meet the National Electrical Code NEC 210.8 for a wide variety of single-, split-, three-phase and 4-wire (neutral supported) systems.
如需获取更多信息，请访问： www.Littelfuse.com/SB4000。
*UL Listed Class A GFCI (UL943)
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Littelfuse是一家多元化的工业技术制造公司，致力于为可持续发展、互联互通和打造更安全的世界提供动力。凭借覆盖超过20个国家的业务和约16,000名全球员工，我们与客户合作，设计和交付创新、可靠的解决方案。服务于超过100,000家最终客户，我们的产品每天应用于世界各地的各种工业、运输和电子终端市场。详情请访问 Littelfuse.com。