LB3400WSK | Circuit Breaker | 400A | 3-Pole | 600V

Meet the LB3400WSK, a robust industrial circuit breaker engineered for demanding electrical systems. With a 400 A rating across 3 poles and a 600 V maximum, this unit is tailored for heavy-load, three-phase environments where dependable protection and quick isolation matter most. It’s the go-to choice for maintenance, retrofit, and replacement projects that require exact spec alignment.

Key specifications

• Amperage: 400 A
• Poles: 3-Pole
• Voltage: 600 V
• Application: Industrial circuit protection for three-phase systems
• Reference: Part number LB3400WSK is the best compatibility reference

Why this breaker matters

When your operation relies on stable, safe power delivery, the LB3400WSK delivers. It’s designed to fit scenarios where matching the exact amperage, pole count, and voltage is critical—think service panels and equipment fed by three-phase networks that demand precise protection and predictable trip behavior. This breaker supports straightforward maintenance workflows, reduces downtime during replacements, and helps maintain compliance with industrial electrical standards by ensuring the same form, fit, and electrical ratings as your existing equipment.

Ideal use cases

• Maintenance shutdowns on large three-phase panels that require 400 A protection at 600 V
• Retrofits where existing gear uses a 3-pole, 600 V breaker with matching footprints
• Replacement scenarios for aging or failing breakers in heavy-load environments
• New installations needing reliable protection for three-phase circuits up to 400 A

Compatibility and purchasing guidance

To ensure a seamless fit, verify that your panel and circuit configuration align with the LB3400WSK’s specs before ordering. The part number LB3400WSK is the most reliable reference for compatibility, so use it to cross-check form factor and ratings with your equipment catalog or panel manufacturer documentation.

Practical tips for best results

• Prepare the installation by confirming three-pole mounting compatibility and wiring terminal requirements in your panel.
• Document the replacement in your maintenance logs to track when the 400 A, 3-pole, 600 V protection was last verified.
• Store an approved, compatible spare in your service inventory to minimize downtime during scheduled maintenance or unexpected outages.