Circuit Breakers
Circuit Breakers
Our circuit breaker lock out devices are manufactured from reinforced engineering nylon (PA66), providing a non-conductive, durable, and lightweight solution for safely isolating miniature circuit breakers (MCBs), molded case circuit breakers (MCCBs), and standard toggle breakers during maintenance and servicing. Designed to comply with OSHA 1910.147 and international electrical safety standards, each breaker lockout device prevents accidental re-energization by securing the breaker handle in the OFF position and accepting a lockout padlock for positive control.
As a factory-direct lockout tagout manufacturer, we supply circuit breaker lockout devices to EHS managers, MRO distributors, and safety equipment brands across the EU, US, Australia, and Southeast Asia — with OEM customization and wholesale pricing available.
Different breaker designs require different lockout approaches. Our product range covers all major circuit breaker lockout types to suit both standard industrial panels and miniature breaker formats common in European and Asian electrical systems:
Clamp-On Circuit Breaker Lockout – Secures to the breaker toggle using a set screw or thumb screw. Compatible with single-pole and multi-pole standard breakers. No modification to the breaker required.
Snap-On MCB Lockout – Pins snap into the side holes of compatible miniature circuit breaker tongues for a fast, tool-free fit. Widely used for DIN-rail mounted MCBs common in European and Asian equipment.
Pin-In MCB Lockout – Fits miniature circuit breakers with holes on the outside of the breaker tongue. Locks the breaker in the OFF position with a padlock through the integrated hasp hole.
Pin-Out MCB Lockout – Designed for mini circuit breakers with holes on the inside of the breaker tongue. Provides a secure, low-profile lockout for panel-mounted MCBs.
Universal Circuit Breaker Lockout – Adjustable design compatible with a wide range of single-pole breaker widths (typically 10 mm to 22 mm). Ideal for facilities with mixed panel brands and breaker sizes.
Multi-Pole / Tie-Bar Breaker Lockout – Covers double-pole and triple-pole breakers, or ganged breakers held together by a tie bar. Prevents partial re-energization of multi-phase circuits.
Not sure which type fits your breakers? Contact our technical team with your breaker brand and model — we will confirm compatibility or recommend the correct device.
Material: Reinforced engineering nylon PA66 — non-conductive, impact-resistant, UV-stable, and rated for industrial environments.
Compatible Breaker Types: Miniature circuit breakers (MCB), molded case circuit breakers (MCCB), single-pole, double-pole, triple-pole, and DIN-rail mounted breakers.
Breaker Width Range: Devices available to fit breaker tongue widths from 6 mm (narrow MCB) up to 38 mm (standard industrial toggle breaker).
Padlock Hole: Standard 5 mm–8 mm shackle opening, compatible with all standard lockout padlocks.
Temperature Range: –20°C to +85°C, suitable for outdoor switchgear, cold storage facilities, and high-temperature industrial environments.
Colors Available: Red (standard), yellow, blue, orange, green — color coding supports multi-department or multi-contractor LOTO programs.
Voltage Rating: Suitable for use on systems up to 690V AC / 1000V DC when used in accordance with OSHA 1910.147 and IEC 60947 procedures.
Compliance: Meets OSHA 1910.147, ANSI Z244.1, and CE requirements for lockout tagout equipment used in electrical energy control.
Correct application of a circuit breaker lockout is critical to OSHA compliance and worker safety. Follow these steps as part of your site's written LOTO procedure:
Step 1 — Identify the energy source. Locate the specific circuit breaker controlling the equipment or circuit to be isolated. Confirm the correct breaker using a circuit directory or test instrument.
Step 2 — Switch the breaker to OFF. Move the breaker handle or toggle to the OFF position before applying any lockout device.
Step 3 — Apply the circuit breaker lockout device. Fit the clamp-on, snap-on, or pin-type lockout device over the breaker tongue or handle according to the device type. Ensure the device is fully seated and prevents the breaker from being switched back ON.
Step 4 — Apply a lockout padlock. Thread a safety lockout padlock through the lockout device hasp hole. Each authorized worker applies their own individually keyed padlock — the breaker cannot be re-energized until all padlocks are removed.
Step 5 — Attach a lockout tag. Fix a danger or caution lockout tag to the padlock or device identifying the worker, date, and reason for isolation.
Step 6 — Verify isolation. Attempt to operate the equipment or use a test instrument to confirm the circuit is de-energized before work begins.
For group lockout involving multiple workers, use a lockout hasp in combination with the breaker lockout device to allow each worker to apply their own padlock.
Our circuit breaker lockout devices are used across industries wherever electrical panel isolation is required under OSHA 1910.147 or equivalent international regulations:
Manufacturing & Production Plants – Isolating machine control panels, motor starters, and production line breakers during planned maintenance, changeover, or emergency shutdown.
Commercial & Industrial Construction – Electricians locking out distribution boards and sub-panels on job sites before wiring, testing, or panel modifications.
Facilities Management & Building Services – HVAC, lighting, and power circuit isolation in commercial buildings, data centers, hospitals, and schools.
Oil, Gas & Chemical Processing – Electrical isolation within classified hazardous areas and process control panels where inadvertent re-energization presents explosion or fire risk.
Utilities & Power Distribution – Isolation of low-voltage distribution breakers in substations and switchrooms during inspection and testing.
Food & Beverage Processing – Lockout of processing equipment electrical supplies during cleaning, sanitation, and preventive maintenance in hygiene-controlled environments.
As a factory-direct breaker lockout manufacturer, we offer flexible supply programs for safety distributors, MRO suppliers, and private-label brands:
Private Label / OEM Branding: Custom color, logo engraving, and branded packaging available. Minimum order quantities are flexible for both growing and established distributors.
Custom Sizing: Non-standard breaker widths or panel configurations? Our engineering team can develop custom tooling for specific OEM requirements.
Bulk & Wholesale Orders: Competitive factory pricing for volume orders. Samples available before bulk commitment.
Lead Times: Stock items 3–7 days · OEM and custom orders 25–35 days · Pre-shipment inspection and CE/test documentation included.
Explore our full OEM & custom solutions or contact us directly to discuss your sourcing requirements.
Circuit breaker lockout devices are often used alongside other electrical lockout products to create a complete electrical energy control program:
Switch Covers & Lockout Devices – For isolating wall switches, toggle switches, and rotary isolators.
Plug Lockout Devices – For locking out electrical plugs and outlets at the point of use.
Safety Lockout Padlocks – Individually keyed or master-keyed padlocks to complete any breaker lockout application.
Lockout Hasps – Multi-lock hasps for group circuit breaker lockout where multiple workers share the same isolation point.
Lockout Tags – OSHA-compliant danger and caution tags to complete the lockout tagout procedure at every circuit breaker.
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