Clamp-on Circuit Breaker Lockout Device – Oversized 480/600 Volt – 3 Pack

TRADESAFE oversized circuit breaker lockout devices are designed to secure compatible 480/600V breakers with larger operating toggles during maintenance, repair, inspection, and electrical service work. This 3-pack accommodates qualifying single- and multi-pole breaker toggles measuring up to 2-3/4" wide by 1" thick, providing additional capacity where smaller clamp-on models do not fit.

Each device combines an impact-resistant, non-conductive nylon body with an oversized clamp-style construction and an extra-thick stainless steel grip plate that bites onto compatible breaker toggles to resist slipping and shifting. An integrated anti-shift cleat helps keep the device fixed in place to resist pivoting under force during servicing and maintenance. A steel thumbscrew with a nylon knob tightens by hand for tool-free installation. The integrated 19/64" shackle hole accommodates a compatible lockout padlock or hasp; padlock and hasp are sold separately. 

Circuit Breaker Lockout for Oversized 480/600V Breakers

This circuit breaker lockout is intended for compatible 480V to 600V breakers with larger operating handles that fall within the stated dimensional limits. Its oversized format expands the supported toggle size to as much as 2-3/4" wide by 1" thick while retaining a compact lockout mechanism that can be installed directly at the electrical panel.

Part number: TSOBRKR. Similar industry part numbers: 65329, S3823

Product specifications include:

• Quantity: 3 oversized breaker lockout devices
• Breaker range: 480V to 600V
• Compatible with qualifying single-pole and multi-pole breakers
• Maximum toggle width: 2-3/4"
• Maximum toggle thickness: 1"
• Non-conductive nylon body
• Steel thumbscrew
• Tool-free installation
• Integrated anti-shift cleat
• Shackle hole diameter: 19/64"; use a compatible padlock or hasp
• LOTO padlocks and hasps are sold separately

Breaker voltage alone does not determine compatibility. Measure the breaker handle and check the breaker configuration and panel layout before ordering. This oversized model is particularly useful when the handle exceeds the capacity of smaller clamp-on lockouts but still falls within the stated 2-3/4" width and 1" thickness limits.

Clamp On Breaker Lockout with Tool-Free Thumbscrew

This clamp-on breaker lockout uses a steel thumbscrew with a nylon knob to tighten firmly around a compatible breaker toggle by hand, without a screwdriver or separate installation tool. The flip-up cover and built-in notch hold the device open during installation, while a stainless steel pivot supports smooth cover movement through repeated use. Once the cover is closed and secured with a personal safety padlock or hasp, the security shield limits access to the clamping screw during lockout.

Construction and installation features include:

• Tool-free steel thumbscrew mechanism
• Integrated anti-shift cleat design
• Oversized clamp-style construction
• Impact-resistant nylon body
• Nonconductive construction
• One integrated lockout point
• 19/64" shackle hole for a compatible padlock or hasp
• Weather-resistant construction
• Chemical-resistant materials
• Tamper-resistant design

The larger clamping area distinguishes this model from standard-size clamp-on breaker devices and makes it suitable for compatible breakers with wider or thicker toggles. The 3-pack can also be divided between electrical maintenance kits, lockout stations, or different work areas where 480/600V breakers with oversized toggles need regular isolation.

Clamp-On Circuit Breaker Lockout for Oversized Breaker Toggles

This clamp-on circuit breaker lockout is suited to electrical maintenance teams, industrial facilities, commercial buildings, contractors, and technicians working with compatible 480/600V breakers. Its larger supported toggle dimensions make it especially relevant when standard clamp-on devices are too small for the breaker handle being isolated.

Installation starts by confirming the breaker type, toggle dimensions, and panel layout. Position the device over the compatible handle, tighten the thumbscrew until firmly seated, and close the cover. Then insert a compatible lockout padlock or hasp through the 19/64" shackle hole to restrict breaker operation until the authorized employee completes the work and removes the lock. Using a hasp allows multiple workers to secure the same breaker with individual locks. Padlocks and hasps are sold separately.

The impact-resistant, non-conductive nylon body is built for the rough handling of daily industrial use. Its high-visibility safety-red color improves recognition of the lockout device at the isolation point. With an operating range of -49°F to 351°F (-45°C to 177°C), this oversized breaker lockout supports use across outdoor installations, mechanical rooms, manufacturing plants, and other environments with demanding temperature conditions.

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.

Choose the TRADESAFE oversized 3-pack when compatible 480/600V breaker toggles require more capacity than a standard clamp-on lockout provides. Verify the 2-3/4" width and 1" thickness limits before use. Keep these oversized breaker lockouts available in your electrical maintenance kit for isolation points that need an oversized fit.

OSHA-Compliant Circuit Breaker Lockout Device

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.