Westinghouse | 371D426G36 | Circuit Breaker | 400A | 3-Pole | 600V

Meet the Westinghouse 371D426G36 circuit breaker—a reliable, purpose-built replacement designed for maintenance, retrofit, and replacement projects where exact specifications matter. Built to support 3-phase systems, this unit delivers dependable protection for demanding electrical environments while preserving the original panel’s performance characteristics.

Key specifications at a glance

• Amperage: 400A
• Poles: 3-Pole
• Voltage rating: 600V
• Part reference: 371D426G36

Why this Westinghouse breaker is the right choice

• Designed for maintenance, retrofit, and replacement tasks where matching specs is essential—ensuring compatibility with existing Westinghouse panels and configurations.
• Three-pole construction makes it ideal for three-phase electrical systems, helping protect equipment and up-scale or restore balanced power distribution in industrial and commercial settings.
• 400A rating supports substantial load centers, making it suitable for service entrances, distribution panels, and large machinery circuits that require robust protection.
• 600V rating broadens its applicability across diverse motor and processing applications, from manufacturing line controls to facility infrastructure upgrades.

Fit, compatibility, and ordering tips

To ensure a seamless replacement, verify the exact fit and ratings before purchasing. The part number is your best reference for compatibility, with 371D426G36 serving as the key identifier. If you’re updating an aging panel or standardizing across a site, this unit provides a straightforward, drop-in option where its specs align with the original equipment.

Practical use cases and setup scenarios

• Retrofit projects in legacy Westinghouse installations where a 400A, 3-pole, 600V breaker is required to restore circuit protection without changing the panel architecture.
• Maintenance replacements after routine inspections reveal degraded breakers that risk nuisance trips or unreliable protection.
• New-install or upgrade scenarios in facilities that operate heavy three-phase loads, such as pumps, conveyors, or large motors, where robust 400A protection is appropriate.

Installation considerations and best practices

• Work with the exact part number (371D426G36) to avoid compatibility gaps with existing panels and accessories.
• Confirm electrical ratings align with the targeted circuit’s demands—three-phase configuration and 600V maximum system voltage are critical for safe operation.
• Follow all safety protocols and manufacturer guidelines during replacement, including de-energizing equipment, verifying absence of voltage, and secure mounting in the panel bus.