Abb THL103 Circuit Breaker Handle Locking Device

Product Description

The ABB THL103 is a snap-on circuit breaker handle locking device designed to lock a breaker in the open or closed position without requiring a padlock. The kit includes one lock for a 1-pole breaker and one lock for a 2-pole breaker, giving electricians a complete locking solution in a single package. Installation requires no tools — the device snaps directly onto the breaker handle. This type of lockout hardware is used in commercial and residential panel work where OSHA or facility lockout/tagout (LOTO) procedures must be observed before servicing downstream equipment.

This locking device is compatible with ABB TQB, TQC, and TQL series circuit breakers. It is commonly installed by licensed electricians during panel upgrades, service disconnects, or any scenario where a breaker must be secured against accidental or unauthorized operation. The snap-on design keeps installation fast and does not require drilling or modification to the breaker or enclosure.

Key Features

• Snap-on installation — no padlock required and no tools needed
• Kit includes one 1-pole lock and one 2-pole lock
• Compatible with TQB, TQC, and TQL series breakers
• Supports lockout/tagout (LOTO) compliance requirements
• Does not require modification to the breaker or panel enclosure

Compatibility

Designed for use with ABB TQB, TQC, and TQL series circuit breakers as stated by the manufacturer.

Installation Notes

Installation is performed by a licensed electrician. Before applying or removing any locking device, de-energize the panel and follow all applicable lockout/tagout procedures in accordance with OSHA 29 CFR 1910.147 and NFPA 70E. Confirm the locking device is fully seated on the breaker handle before considering the lock engaged. Do not force the device onto handle styles not listed as compatible.

Technical Specifications

• UPC: 783164010664
• Included Locks: One 1-pole lock, one 2-pole lock
• Padlock Required: No
• Mounting Type: Snap-on

Standard Information

• Brand: ABB
• Manufacturer Part Number: THL103