Westinghouse | 371D426G04 | Circuit Breaker | 400A | 3-Pole | 600V | Bolt-On

The Westinghouse 371D426G04 Circuit Breaker is a bolt-on, high-capacity protection device engineered for demanding electrical environments. With a 400A rating across three poles and a 600V maximum, this unit delivers reliable, synchronized protection for three-phase circuits in commercial and industrial settings.

Designed for maintenance, retrofit, and replacement projects where exact specifications matter, this breaker fits Westinghouse-compatible panels and systems that require the 371D426G04 designation. Before ordering, confirm fit and ratings—the part number is the best reference for compatibility.

Key specifications

• Amperage: 400 A
• Poles: 3-Pole
• Voltage: 600 V
• Mounting: Bolt-On
• Part number: 371D426G04

What makes this breaker stand out

Unlike generic replacements, the 371D426G04 is purpose-built for Westinghouse panel ecosystems. Its bolt-on design ensures a secure, vibration-resistant connection, essential for long-term reliability in active electrical rooms. The 3-pole configuration provides balanced protection across all three phases, helping to prevent unbalanced loads and maintaining system stability in 600V distributions.

Ideal applications

• Maintenance and retrofit projects in facilities that require exact 371D426G04 specifications
• Replacement for compatible Westinghouse equipment in commercial electrical rooms
• Upgrading or renewing three-phase, 600V distribution circuits in industrial environments

Practical installation notes

Because mounting hardware and bus-bar configurations vary, always verify compatibility with the exact part number 371D426G04 before purchasing. Follow local electrical codes and manufacturer guidelines for bolt-on installation to ensure safe, reliable operation.