Westinghouse | LB3400 | Circuit Breaker | 3-Pole | Bolt-On

Meet the Westinghouse LB3400 Circuit Breaker—a dependable 3-pole bolt-on solution designed for professional electrical panels that require solid three-phase protection. Identified by its part number LB3400, this breaker is crafted for maintenance, retrofit, and replacement projects where precise compatibility matters.

• 3-Pole bolt-on design provides secure, multi-phase protection for three-phase circuits, helping to safeguard motors, compressors, and other industrial equipment.
• Bolt-On mounting delivers a sturdy, vibration-resistant connection that remains reliable through demanding operating conditions.
• Maintenance, retrofit, and replacement ready—an ideal choice when updating existing panels or upgrading to a proven three-phase protection solution.
• Best compatibility reference—use the part number LB3400 as your primary reference to ensure a proper fit for compatible Westinghouse panels and bolt-on installations. Always confirm fit and ratings before ordering.

Who this is for

• Facilities managers and electricians performing panel upgrades in commercial or light industrial environments.
• Technicians replacing aging breakers in systems that require a 3-pole, bolt-on configuration.
• Projects where exact spec matching (LB3400) is essential to maintain electrical code compliance and system protection.

Why it matters

• Reliable three-phase protection translates to fewer unexpected trips, smoother motor startup, and improved overall panel performance.
• Using the LB3400 supports consistent electrical protection strategies across compatible Westinghouse panels, reducing compatibility guesswork during maintenance or upgrades.
• Clear compatibility guidance—relying on the LB3400 part number helps you verification steps quickly, minimizing downtime and mis-orders in the field.

When planning installation, verify that your panel accepts bolt-on breakers of the LB3400 family and that the ratings align with your load requirements. This approach ensures a seamless retrofit or replacement, delivering dependable protection for your three-phase systems without the guesswork.