Westinghouse | 371D426G05 | Circuit Breaker | 400A | 2-Pole | 600V | Bolt-On

Westinghouse 371D426G05 is a purpose-built circuit breaker designed for robust protection in demanding electrical systems. This 400A, 2-pole unit delivers reliable overcurrent protection at up to 600V, engineered for bolt-on mounting to fit compatible panels and switchgear. Ideal for maintenance, retrofit, and replacement projects, it helps you restore or upgrade protection without overhauling your entire power distribution setup.

Key Details

• Amperage: 400 A
• Poles: 2-Pole
• Voltage Rating: 600 V
• Mounting: Bolt-On
• Part Reference: 371D426G05

Why choose this Westinghouse breaker

• The bolt-on design and 2-pole configuration are tailored for panels and equipment that require this specific footprint and protection level.
• When your application demands substantial current handling, this breaker provides robust overcurrent protection while maintaining stable operation in industrial and commercial settings.
• The part number 371D426G05 serves as the primary reference to verify fit, ensuring you’re selecting the correct replacement without guesswork.

Ideal use cases

This breaker is well-suited for:

• Maintenance and service replacement in existing panels that match the 371D426G05 specification
• Retrofits that upgrade protection to 400A in industrial control panels and commercial switchgear
• Spare inventory for field technicians who service bolt-on, high-current applications

Installation and compatibility tips

To ensure a smooth fit and reliable performance, consider these practical checks before ordering:

• Confirm the panel or equipment supports a bolt-on, 2-pole, 400A, 600V breaker in the same form factor as 371D426G05.
• Compare the exact part number (371D426G05) as the primary compatibility reference to avoid mismatches.
• Verify mounting hardware requirements and panel bus-bar geometry align with bolt-on installation.
• Ensure the application aligns with the voltage and current ratings to maintain proper protection and electrical safety.

Practical considerations

For ongoing reliability, keep these tips in mind:

• Store replacements in a dry, clean environment to prevent corrosion and ensure easy field replacement.
• Document the replacement part number and installation date for maintenance records and future retrofits.
• Adhere to local electrical codes and manufacturer guidelines during installation and replacement.