Clamp-on Miniature Circuit Breaker Lockout Device - 10 Pack

More Details on Clamp-on Miniature Circuit Breaker Lockout

TRADESAFE Clamp-on Miniature Circuit Breaker Lockout delivers precision-fit lockout control for 120/240V electrical systems. Engineered for short-stroke small and medium breakers, single- and multi-pole miniature breakers, and most tie-bar toggles, it secures compatible handles up to 3/4" high x 5/16" thick with no handle-width restriction. Built for industrial teams that refuse to compromise on safety, this mini circuit breaker lockout grips firmly and stays put, where generic breaker locks slip loose and fail fast. Every TRADESAFE small breaker lockout device is designed to support OSHA 29 CFR 1910.147 requirements, giving safety leaders unmatched compliance confidence.

• Part Number: TSMDCBL10; similar industry part number: 149514, S3821
• (10) Miniature circuit breaker lockout devices secure handles up to 3/4" height x 5/16" thickness with no restriction on handle width; impact-resistant nylon with an aggressive serrated stainless clamping pin, steel knurled screw, and brass nut
• Engineered for short-stroke small and medium breakers, single- and multi-pole miniature breakers, and most tie-bar toggles with compatible handle size
• Integrated cleat sits tight against the breaker toggle to brace against handle pressure during lockout, delivering positive hold on short-stroke miniature breakers where flat clamping alone slips
• Ultra-compact design mounts between vertically and horizontally adjacent breakers and sits side-by-side on back-to-back mini breakers, helping technicians secure compatible handles in cramped panel layouts with more efficiency
• Designed to maintain structural integrity across an extreme -49°F to 351°F (-45°C to 177°C) operating range for uncompromising performance in harsh environments
• Featuring a screw-clamp mechanism with a steel knurled, slotted screw for fast tightening to prevent shifting, and optional screwdriver adjustment for added clamp force
• Integrated opening notch helps lift the cover quickly during install; 19/64” shackle hole diameter meticulously built for unobstructed padlock/hasp insertion; lockout padlocks and hasps are sold separately
• TRADESAFE breaker locks are designed to support OSHA 29 CFR 1910.147 requirements for maximum compliance confidence
• TRADESAFE is an established USA-based and owned industry expert and reliable safety partner for LOTO compliance supplies

Precision-Fit Mini Circuit Breaker Lockout Compatibility

TRADESAFE circuit breaker lockout device is engineered to solve one of the most common frustrations with electrical breaker lockout: poor compatibility and unreliable fit across industrial breaker handles. This miniature circuit breaker lockout is designed around precise handle dimensions, securing breaker handles up to 3/4" height and 5/16” thickness with no restriction on handle width.

This dimension-driven compatibility allows the device to lock out wider industrial breaker handles that standard clamp locks often fail to secure, making it especially effective for short-stroke single- and multi-pole miniature breakers and most tie bar toggles. The result is faster energy isolation, fewer compatibility surprises, and a more efficient lockout procedure across diverse breaker panels, helping maintenance teams maintain control over hazardous energy during servicing, inspection, and repair operations.

To ensure compatibility, check out our Breaker Lock Solution Guidelines to find the right TRADESAFE Breaker Lockout Device for your specific breaker model and number of poles.

Industrial Strength Breaker Lockout Construction

The small breaker lockout device pairs an impact-resistant, non-conductive nylon body with a serrated stainless steel clamping pin, steel knurled screw, and brass nut. The serrated pin bites into the breaker handle while the integrated cleat braces against handle pressure, creating a slip-resistant hold that resists shifting where flat-jaw breaker locks can lose their grip.

Engineered to maintain structural integrity across -49°F to 351°F (-45°C to 177°C), the mini circuit breaker lockout brings material-level resilience to demanding industrial temperature conditions. This allows the device to perform reliably in outdoor installations, mechanical rooms, manufacturing plants, and other environments where temperature extremes can compromise inferior lockout devices.

Slip-Resistant Electrical Breaker Lockout

The circuit breaker lockout device features a precision screw-clamp locking system engineered to deliver a powerful, controlled clamping force that keeps the lockout firmly secured once installed.

At the center of the mechanism is a steel knurled screw with precision threading, allowing technicians to tighten the device quickly by hand for rapid deployment, no tool required. For applications requiring additional clamping force, the slotted screw head enables optional screwdriver tightening, giving technicians greater torque and locking confidence when working with high-resistance breaker handles.

To streamline installation further, the device has an integrated opening notch that helps lift the cover during placement, reducing fumbling during installation. The 19/64” shackle hole diameter accommodates standard lockout padlocks and hasps, allowing smooth insertion during individual or group lockout/tagout procedures. With a compact design, this miniature circuit breaker lockout can fit in between tightly packed vertical or horizontal breakers where bulky lockouts struggle, helping secure compatible handles with faster placement and reliable lockout efficiency during servicing and maintenance.

OSHA-Compliant LOTO Breaker Locks

Compliance with the OSHA Standard for The Control of Hazardous Energy (Lockout/Tagout) (29 CFR 1910.147) is vital to the safety of every employee on site. That’s why we make sure that all of our products help workplaces remain OSHA-compliant.

TRADESAFE products are made with the requirements for lockout tagout devices in mind. These are the requirements pursuant to OSHA Standard 1910.147:

• Durable: Devices must be able to withstand exposure to the environment in which they will be used for as long as necessary.
• Standardized: Devices used in a facility must be standardized according to color, shape, or size.
• Substantial: Devices must be difficult to remove without the use of excessive force or techniques that are not typically used to remove the devices. They should also be able to prevent accidental removal.
• Identifiable: Devices must be able to identify the employee who applied them.
• Exclusive for Safety: Devices must not be used for any purpose other than controlling energy.

TRADESAFE: A Trusted USA-Based Partner in Lockout Tagout

• TRADESAFE is a USA-based company well-versed in OSHA regulations
• People-centered supplier of safety products
• High-quality products made of heavy-duty and durable materials
• Constant innovation and continuous adaptation to new standards

TRADESAFE is your partner in safety and we always keep the seriousness of that role in mind. That’s why all of our lockout tagout products are industrial-grade and meet regulatory standards. They are all ideal for use in the lockout of electrical and many other energy applications.

We don’t want to just be your supplier. We want to be your partner. For this reason, we approach things differently. Each and every day our team works to improve our products and the services we provide to the great people and businesses that put so much faith in us.

TRADESAFE is a USA-based company. This helps us stay up to date on the latest OSHA safety standards. We are inspired by the American worker and we are honored to help keep you safe from harm and hazards.