Product Spotlight: Littelfuse® SB5000 Series Industrial Shock Block®
The scoop on solutions built to perform, protect, and last.
The SB5000 Series Industrial Shock Block® from Littelfuse® is now available at City Electric Supply — and it’s built to deliver the protection professionals can count on in demanding environments.
This safety device detects electrical leakage and shuts off power fast, helping prevent shock and reduce unnecessary downtime. Whether you’re an electrician, contractor, or facility supervisor, it’s a powerful upgrade for any job that demands safety, reliability, and performance.
Built to keep the work moving
The SB5000 Series helps protect workers from electrical shock and reduce costly delays caused by false trips — a common issue with traditional GFCIs. It meets the latest UL 943C standard for Class C devices, designed specifically for industrial facilities.
Class C GFCIs are intended for three-phase systems at 480 volts or less, with a trip level of 20 mA.
Class D GFCIs are designed for 600-volt systems, offering advanced protection in high-powered applications.
Class A GFCIs have a fixed 6 mA trip level for 208-volt appliances such as stainless steel equipment and conductive surfaces where shock is more likely to occur.
It’s available in models supporting loads up to 100 amps, giving you the capacity and confidence to power through.
Fewer interruptions. Fewer surprises. More confidence on the job.
Ready for anything the job throws at it
Tough conditions are no problem for the Industrial Shock Block. It’s equipped with advanced ground-check functionality that can stop equipment from energizing if a ground connection is compromised — giving professionals on jobsites an extra layer of protection.
Smart features like LED diagnostics, simplified installation, and optional communication capabilities make the SB5000 a dependable choice for crews that can’t afford to slow down.
Real-world applications
It’s the ideal solution for any setting where moisture, dust, or heavy use comes with the territory.
Littelfuse offers multiple Shock Block devices tailored to common jobsite needs in industrial and commercial environments, including: Food processing and general manufacturing facilities, water parks, kitchens, vehicle service centers, and wherever safety and code compliance are critical.
Every Shock Block is purpose-built to meet safety standards while minimizing interruptions to keep work moving.
A brand trusted by the pros
With over 95 years of experience in circuit protection and electrical safety, Littelfuse has built a reputation for innovation, durability, and trust. Their solutions are engineered with the trades in mind — built to meet code, perform under pressure, and protect what matters most.
That’s why industry pros turn to Littelfuse when the job demands nothing less than dependable, high-performance protection.
