Westinghouse | NBY3800S | Circuit Breaker | 800A | 3-Pole | Bolt-On

Meet the Westinghouse NBY3800S Circuit Breaker — a rugged, bolt-on solution crafted for demanding panels. With an 800A rating and three poles, this unit is built to protect three-phase systems while delivering reliable, field-ready performance for maintenance, retrofit, and replacement projects. The bolt-on design simplifies installation, helping you minimize downtime during panel upgrades or service work.

• Amperage: 800A
• Poles: 3-Pole (three-phase protection)
• Mounting: Bolt-On for straightforward field installation
• Part Number: NBY3800S — the best reference for compatibility

Why this breaker stands out for real-world electrical work:

• The NBY3800S is designed to be swapped into panels that accept this specific bolt-on, three-pole configuration. Before ordering, confirm the panel’s compatibility using the part number as your primary reference.
• An 800A rating makes it suitable for mid to large three-phase circuits, providing dependable overcurrent protection where uptime matters.
• Efficient retrofits and replacements: The bolt-on design reduces installation time and mechanical complexity, making it a practical choice for service upgrades, panel modernization, or equipment refresh without extensive rewiring.
• Versatile for multiple applications: Ideal for industrial control panels, commercial electrical rooms, and service panel upgrades where 3-phase protection and robust construction are required.

Use cases and practical scenarios

Engineered for real-world applications, the Westinghouse NBY3800S suits:

• Maintenance and replacement of aging 3-phase protection in retrofit projects
• Upgrading panel protection in facilities with heavy electrical loads
• New installations where a bolt-on, three-pole breaker is the appropriate choice

Specification snapshot

• 800A
• Poles: 3-Pole
• Mounting: Bolt-On
• Part Number: NBY3800S

Guidance for buyers: this part number is the most reliable reference for compatibility. Always verify fit and ratings against your panel’s catalog and listing before purchase to ensure a seamless replacement or upgrade. If you’re upgrading three-phase protection in a commercial or light industrial setting, the Westinghouse NBY3800S delivers a precise, dependable bolt-on solution that aligns with standard panel configurations and maintenance workflows.