Westinghouse | NB21000 | Circuit Breaker | 1000A | 2-Pole | 600V

Westinghouse NB21000 Circuit Breaker is a purpose-built protection device engineered for demanding electrical environments. This 2-pole unit delivers reliable overcurrent protection at 600V with a high-current rating of 1000A, making it a solid choice for essential power distribution in commercial and industrial settings.

Designed for maintenance, retrofit, and replacement projects where exact specifications matter, the NB21000 series slips into compatible panels and switchgear with minimal downtime. When the goal is to restore or upgrade service continuity, this model provides a straightforward, drop-in solution that aligns with existing system architecture.

Key specifications

• Amperage: 1000A
• Poles: 2-Pole
• Voltage: 600V
• Reference: Part number NB21000 is the best compatibility guide

Notes on compatibility: Before ordering, confirm fit and ratings for your panel or distribution equipment. The NB21000 part number is the primary reference to ensure a precise match with your existing assembly and to maintain system safety and performance.

Why this NB21000 stands out

With a focus on real-world reliability, this 1000A, 2-pole, 600V breaker supports synchronized protection across both hot legs, helping to maintain balanced loads and limit fault impact. It’s designed for use in service panels, distribution boards, and related switchgear where fast, predictable interruption is critical to protect wiring, downstream equipment, and personnel.

Ideal use cases

- Maintenance: replacing worn or aging breakers in NB21000-compatible panels to restore protective performance without extensive rewiring.

- Retrofit: upgrading legacy systems that require a 1000A, 2-pole, 600V protective device to meet current safety and reliability standards.

- Replacement: stocking a critical spare for mission-critical infrastructure to minimize downtime during scheduled or unscheduled outages.

For professionals managing industrial electrical systems, the Westinghouse NB21000 provides a straightforward, compatible solution that keeps power flowing safely and efficiently. Always reference the NB21000 part number to verify fit and ratings, and consult your equipment documentation to ensure correct installation and operation in your specific application.