Westinghouse | 371D426G18 | Circuit Breaker | 400A | 3-Pole | 600V | Bolt-On

Introducing the Westinghouse 371D426G18 Circuit Breaker — a high-current, three-phase protection solution designed for demanding electrical systems. With a 400A rating, 3-pole configuration, 600V capability, and bolt-on mounting, this unit is built for reliable performance in maintenance, retrofit, and replacement projects where precise compatibility matters.

Key specifications at a glance

• Amperage: 400A
• Poles: 3-Pole
• Voltage: 600V
• Mounting: Bolt-On
• Part reference: 371D426G18 — use this number to verify compatibility with your panel and catalog

What sets this breaker apart

• Designed for straightforward bolt-on installation in compatible Westinghouse distribution panels, minimizing downtime during maintenance or upgrades.
• Robust construction tailored for commercial and industrial environments, delivering dependable overcurrent protection when a fault occurs.
• Three-pole, common-trip configuration provides balanced protection for three-phase systems, making it ideal for large motors, compressors, and multi-phase equipment.
• Reliable replacement option: rely on the part number 371D426G18 to ensure precise fit and seamless integration with existing panel architectures.

Use cases and practical scenarios

• Maintenance: Swap aging or malfunctioning breakers in a Westinghouse panel without rewriting protection schemes.
• Retrofit: Upgrade legacy systems to a current protection standard while preserving the original panel layout.
• Replacement: Quick, compatible replacement for failed units in three-phase circuits that demand consistent trip characteristics.

Installation and safety tips

• Always confirm fit and ratings before ordering — the 371D426G18 part number is the most reliable compatibility reference.
• Ensure the main service is de-energized and apply lockout/tagout procedures before working on the panel.
• Verify bolt-on mounting compatibility with your panel’s design and follow the manufacturer's torque specifications during installation.
• Match protection to load profile: check your downstream equipment and upstream protection to prevent nuisance trips while safeguarding critical circuits.

Who benefits most

Electrical professionals, facilities engineers, and maintenance teams responsible for Westinghouse-compatible panels or systems requiring a high-current, three-phase 600V protection solution. Ideal for commercial buildings, industrial facilities, data centers, and equipment rooms where dependable circuit protection and straightforward replacement are essential.

Protect your critical circuits with the Westinghouse 371D426G18 — a reliable, compatible choice for demanding electrical architectures.