Circuit Breaker Lockout Device - Medium and Large Breakers - 20 Pack

More Details on Circuit Breaker Lockout for Medium and Large Breakers

TRADESAFE Circuit Breaker Lockout for Medium and Large Breakers delivers dependable lockout control for industrial electrical systems. Engineered for compatible single- and multi-pole medium and large breakers, including molded case circuit breakers, each device secures handles up to 9/16-inch high x 3/8-inch thick with no handle-width restriction. The gripping jaw and pointed brass thumbscrew tip reach into deep or recessed toggle cavities, securing curved handles, flat handles with deep cavities, and long curved toggle strokes. Built for industrial teams that refuse to compromise on safety, this circuit breaker lockout grips firm and stays put, where generic breaker locks slip loose and fail fast. Every TRADESAFE breaker lockout device is designed to support OSHA 29 CFR 1910.147 requirements, giving safety leaders unmatched compliance confidence.

• Part Number: TSMBRKR20; similar industry part number: 873367, S2393, SFP110, 7110
• (20) Circuit breaker lockout devices secure handles with up to 9/16" height x 3/8" thickness, with no restriction on handle width; features a 5/16” jaw opening, premium nylon body with brass screw
• Engineered for single- and multi-pole medium and large breakers, including molded case circuit breakers, with curved handles, flat handles with deep cavities, or long curved toggle strokes
• Gripping jaw and pointed brass thumbscrew tip reach into deep or recessed toggle cavities for a controlled, slip-resistant bite
• Integrated anti-shift cleat helps keep the device fixed in place to resist shifting or pivoting under force during servicing and maintenance
• Impact-resistant nylon 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
• High-force screw-clamp mechanism with a brass knurled screw for fast hand-tightening to prevent shifting; 19/64” shackle hole diameter enables smooth padlock or hasp insertion, 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 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 circuit breaker lockout is designed around precise handle dimensions, securing breaker handles up to 9/16" height x 3/8" thickness with no restriction on handle width.

This expanded compatibility allows the device to lock out wider industrial breaker handles that standard clamp locks often fail to secure, making it especially effective for single- and multi-pole medium and large breakers with curved surfaces or toggles and compatible MCCBs used in commercial and industrial electrical systems. 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.

Fail-Safe Breaker Lock Out

The integrated anti-shift cleat of this breaker lockout reinforces the clamped hold to resist shifting or pivoting under force. This stabilizing mechanism helps maintain controlled breaker lock placement on compatible curved-face and deep-cavity breaker handles that standard flat-jaw designs may struggle to secure. That means less readjustment and stronger confidence during demanding lockout procedures.

The circuit breaker lockout device features a gripping jaw that works with a pointed brass thumbscrew tip that reaches into deep or recessed toggle cavities. Its knurled surface enables rapid hand-tightening without tools, giving technicians direct control over the clamping force during installation. 

To install, position the device on the compatible breaker handle and hand-tighten the thumbscrew. Pivot the top section 90 degrees, then insert a compatible lockout padlock or hasp through the 19/64-inch shackle hole to prevent access to the screw. Depending on the breaker design, the device can secure compatible breakers in the OFF or ON position. Follow the facility’s established energy-control procedure, as locking a breaker in the ON position is generally not recommended for safety applications. Padlocks and hasps are sold separately. 

Industrial-Strength Breaker Lockout Construction

The electrical breaker lockout is built for extreme industrial environments where weak plastic lockouts routinely fail. Constructed from premium non-conductive nylon with a brass screw, this device delivers the mechanical strength required to withstand repeated installation, vibration, and jobsite abuse. Moreover, its high-visibility safety-red body improves hazard recognition, helping businesses meet safety standards and requirements.

To ensure dependable performance across diverse facilities, the breaker lock out tag out operates within an extreme -49°F to 351°F (-45°C to 177°C) operating range. This verified temperature range supports use across outdoor installations, mechanical rooms, manufacturing plants, and other environments where temperature extremes can compromise inferior lockout devices.

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.