Westinghouse | NB3300P | Circuit Breaker | 300A | 3-Pole | 600V

Westinghouse NB3300P Circuit Breaker delivers dependable overcurrent protection in a rugged, purpose-built package. This 300A, 3-pole, 600V unit is crafted for maintenance, retrofit, and replacement projects where exact specifications matter and downtime is minimized.

Key specifications

• Amperage rating: 300A
• Poles: 3-Pole
• Voltage rating: 600V
• Reference: NB3300P (best compatibility reference)

Why choose the NB3300P for your panel upgrade or service change

When your system requires a precise 300A, 3-pole, 600V protection device, the NB3300P ensures you stay within established specifications and preserve protection curves. Relying on the exact part number reduces guesswork during replacements and helps maintain panel listings and warranty considerations where applicable.

Ideal use cases

• Maintenance replacements in commercial or light-industrial panels that rely on a 300A main breaker.
• Retrofits to upgrade service capacity or replace aging protection devices without a full panel overhaul.
• Repairs or swaps in facilities that standardize on Westinghouse NB-series breakers for consistent performance and easier ordering.

Important: Confirm fit and ratings before ordering. The NB3300P part number is the best reference for compatibility with your panel and bus arrangement.

Installation considerations and practical tips

• Verify that your panel accepts a 3-pole, 600V main breaker with a 300A rating to ensure proper fit and performance.
• Check mounting style, enclosure footprint, and bus configuration to align with the NB3300P’s design.
• Review your facility’s listings and certification requirements to confirm that using NB3300P maintains compliance and system integrity.
• Keep the exact part on hand to streamline future swaps and minimize downtime during maintenance windows.

Designed for reliability in demanding environments, the Westinghouse NB3300P is a precise, purpose-built solution for seasoned electricians and facility engineers tackling protection upgrades, panel retrofits, or replacement projects. It’s not just a part—it’s a strategic choice to protect equipment, people, and production uptime.