SB4000 30A in-line safety breaker sealed to IP69K/NEMA 4X| Electronics Weekly

The standard enclosure is IP 69K/NEMA 4X and outdoor rated making it suitable for industrial environments. The models equipped with connections for a neutral wire have built-in grounded-neutral protection per the UL 943 standard, says the company.

SB4000

The SB4000 is described as “panel agnostic” making it suitable for remodel and retrofit applications. For example, in HVAC, commercial kitchens, 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.

The SB4000 is available for use in single-, split- and three-phase systems as well as 4-wire systems from 208 to 240V.

The company highlights that an inverse time detection circuit protects people while also reducing the probability of nuisance tripping. Also that it eliminates nuisance trips due to harmonics

With screwless terminal blocks, there are no flying leads and the mounting feet are adjustable.

Industrial

“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,” said 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.”

Features

• UL 943 inverse time trip curve
• Advanced digital filtering algorithm
• Streamlined design
• Fixed 6 mA (UL 943) trip level
• Quick install and configuration
• Conformal coating
• Automatic self-test

You can read the SB4000 datasheet (PDF) on the Littelfuse website.

Littelfuse global headquarters are in Chicago. Its main operational facility and semiconductor manufacturing site in the UK is in Chippenham, Wiltshire.

Image: Littlefuse

See all our Littelfuse content.