Eaton WEB3400B Circuit Breaker, 400A, 3-Pole, 600V

The Eaton WEB3400B circuit breaker is engineered for industrial electrical service, maintenance, and replacement projects. With a 400 A rating, a 3-pole configuration for 3-phase systems, and a 600 V capacity, it provides dependable protection in demanding environments where uptime and safety matter.

Built to integrate into panels and switchgear that require the WEB3400B form factor, this unit emphasizes compatibility through its part number. To ensure a perfect fit, verify the specific application requirements and confirm compatibility by part number before purchasing or swapping in the field.

Who should consider the WEB3400B?

• Facilities managers, maintenance teams, and electrical contractors tackling service upgrades, panel replacements, or new installations in industrial settings.
• Projects that require reliable, high-current protection for 3-phase power distribution at up to 600 V.
• Applications where confirming part-number compatibility minimizes downtime and ensures a smooth retrofit.

Key details at a glance

• Amperage: 400 A
• Poles: 3 (3-pole configuration for 3-phase systems)
• Voltage: 600 V
• Purpose: Industrial service, maintenance, and replacement projects
• Compatibility reminder: Verify fit by part number and application requirements

Practical guidance for procurement and installation

• Use the WEB3400B part number as the primary reference to match your panel or switchgear requirements.
• Cross-check your system’s voltage and current needs to confirm the 600 V / 400 A specification aligns with the intended load.
• If you’re uncertain about compatibility or fit, send us a message—our team can assist with part-number validation and application considerations to help you avoid delays.