Westinghouse | 371D426G38 | Circuit Breaker | 400A | 3-Pole | 600V | Bolt-On

Meet the Westinghouse 371D426G38 Circuit Breaker — a robust, bolt-on solution engineered for demanding electrical environments. With a 400A rating across 3 poles and a 600V maximum, this breaker delivers reliable overcurrent protection for large feeders and three‑phase distribution panels. Designed for maintenance, retrofit, and replacement projects, it fits where the part number 371D426G38 is specified, ensuring a direct-fit path to restored performance.

Key specifications

• Amperage: 400 A
• Poles: 3-Pole
• Voltage rating: 600 V
• Mounting: Bolt-On
• Part number: 371D426G38

Why this breaker stands out

• Direct-fit option for panels and systems that require the 371D426G38 specification, minimizing guesswork during replacements or upgrades.
• Bolt-on design provides a secure, vibration-resistant connection ideal for environments with heavy equipment or frequent duty cycling.
• Three-pole configuration delivers balanced protection across all phases, helping prevent imbalances that can stress downstream equipment.
• 600V-rated insulation and construction tailored for commercial and industrial electrical distributions, supporting higher-energy applications with confidence.

Ideal use cases

• Maintenance and repairs where a precise spec match is required to maintain panel integrity and warranty.
• Retrofits that upgrade or replace aging breakers in three-phase systems, ensuring consistent protection with existing bus layouts.
• Replacement scenarios in industrial or commercial panels that demand a 400A, 3-pole, bolt-on solution for reliable shutdown and load separation.

Compatibility and installation tips

Before purchasing, confirm that your panel supports bolt-on breakers and that the bus arrangement aligns with the 3-pole, 400A, 600V configuration. The part number (371D426G38) is your strongest compatibility reference — use it when verifying with panel documentation or supplier records. For installation, follow standard electrical safety procedures: power down the system, verify absence of voltage, and secure the breaker firmly to the mounting points to maintain a solid electrical and mechanical connection. If you’re unsure about fit, consult your panel’s documentation or a licensed electrician to ensure proper compatibility and safe operation.

Practical considerations for ongoing reliability

• Keep a spare 371D426G38 on hand for planned maintenance or unplanned outages to minimize downtime.
• Label circuits clearly around the breaker to simplify future inspections and troubleshooting.
• Regularly inspect mounting hardware and wiring connections to maintain bolt-on integrity and protective performance over time.