Westinghouse | 371D426G07 | Circuit Breaker | 400A | 3-Pole | 600V | Bolt-On

Engineered for reliability in demanding electrical systems, the Westinghouse 371D426G07 circuit breaker delivers dependable overcurrent protection in a compact bolt-on package. Designed for 3-pole, 400-amp circuits at up to 600 volts, this unit is built to handle heavy loads in commercial and light industrial panels while maintaining the clear, trip-free operation you expect from Westinghouse.

Why choose this model? Its bolt-on mounting provides a solid, field-serviceable connection that stays secure under vibration and routine maintenance. The 3-pole configuration protects all three phases in a three-phase system, helping maintain balanced loads and safer operation across your distribution panel. Precision-fit design helps minimize nuisance trips and ensures consistent performance when the power demands rise.

• Amperage and voltage: 400A, 600V, 3-pole configuration for comprehensive three-phase protection.
• Bolt-on design: Secure, durable attachment suitable for compatible panels and service environments.
• Replacement and retrofit ready: The 371D426G07 part number is the best reference for compatibility—verify fit before ordering.
• Ideal applications: Maintenance, retrofit, and replacement in commercial or light industrial panels that require a 3-pole 400A, bolt-on breaker.
• Installation notes: Confirm panel compatibility and ratings; use proper wiring practices and panel labeling to ensure code compliance.

Practical use cases include upgrading an aging distribution panel to support higher loads, replacing a worn-out breaker in a Westinghouse or compatible panel, or performing routine maintenance during a scheduled service window. By matching the part number and specifications exactly, you minimize downtime and ensure continuity of protection across your electrical system.

Who it's for: facilities with commercial or light-industrial electrical infrastructure that demands robust, high-current protection with a secure bolt-on mounting. If your service panel or switchgear requires a 3-pole 400A 600V breaker with bolt-on mounting, this Westinghouse model is designed to fit and function as intended.

Notes: Always verify fit and ratings before ordering. The part number 371D426G07 is the most reliable reference for compatibility with your panel. For professional installation and to maintain compliance with local electrical codes, consult a qualified electrician.