LB3400S | Circuit Breaker | 400A | 3-Pole | 600V

LB3400S is an industrial circuit breaker designed to protect three-phase electrical systems in demanding environments. This 400A, 3-Pole, 600V device is ideal for maintenance, retrofit, and replacement tasks where exact specifications are required to maintain safety and reliability.

Key specifications

• Amperage: 400A
• Poles: 3-Pole
• Voltage: 600V

Important compatibility note

Confirm fit and ratings before ordering. The part number LB3400S is the best reference for compatibility with your panel or equipment.

What makes LB3400S unique

Designed for three-phase protection in industrial settings, the LB3400S helps prevent motor damage, panel faults, and downtime by interrupting fault currents at the exact thresholds required by your system. Its 400A capacity supports robust load profiles typical of manufacturing lines, pumping stations, and other heavy equipment—delivering reliable protection without over-spec or under-protect.

Ideal use cases

• Maintenance: swap in a like-for-like unit to restore original protection and trip response.
• Retrofit: replace aging breakers to meet newer safety standards without overhauling your panel.
• Replacement: quick, reliable replacement in service equipment that calls for LB3400S-class protection.

Installation and verification tips

Before installation, verify that your system operates within a 600V maximum and that a 3-Pole configuration is required. Use the LB3400S part number as the primary compatibility check against your equipment list or OEM documentation. When wiring, adhere to standard electrical safety practices and follow the panel’s manufacturer torque and wiring guidelines to ensure secure connections.