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NB31000 - 1000 Amp Circuit Breaker

  • 1000 Amp
  • 22k @ 600VAC; 30k @ 480VAC; 42k @ 240VAC
  • 3 Pole
Circuit BreakersSKU: NB31000 [NS]

Purchase Options: New In Box

NB31000 - 1000 Amp Circuit Breaker Description

NB31000 - 1000 Amp Circuit Breaker

Looking for a heavy‑duty circuit breaker that fits into demanding electrical systems? The NB31000 delivers reliable protection for industrial and commercial setups, giving you peace of mind with its 1000 Amp rating. Designed for maintenance work where safety matters most, this three‑pole circuit breaker combines overload and short‑circuit defense in one flexible package.

Key Features and Benefits

  • High‑Capacity Protection (1000 A): This breaker handles high-current loads with confidence, so you can count on it to keep your equipment safe during heavy‑duty operations.
  • Thermal‑Magnetic Trip System: Built with both thermal overload and magnetic short‑circuit protection, it includes an interchangeable trip unit—giving you the freedom to adjust response based on your needs.
  • Included Load‑Side Terminals: Comes ready with load‑side terminals installed, so you can get it wired and in place more quickly and easily during maintenance.
  • Tolerant of Tough Temps (Up to 40 °C): Crafted to work smoothly even when things heat up, this breaker stays reliable at high ambient temperatures.
  • Space‑efficient Design: While it’s built for serious capacity, its shape is designed to drop into your panel without eating up unnecessary room.

Technical Specifications

  • Ship Weight: 57 lbs
  • Dimensions:
    • Width: 8.25 inches
    • Length: 16.00 inches
    • Depth: 5.50 inches
  • Poles: 3
  • Amperage: 1000 A
  • A.I.C. (Interrupting) Ratings:
    • 22 kA @ 600 VAC
    • 30 kA @ 480 VAC
    • 42 kA @ 240 VAC
  • Frame Type: NB
  • Temperature Rating: 40 °C
  • Installation: Bolt‑On
  • Interchangeable Trip Unit: Yes
  • Load‑Side Terminals: Included

Material Compliance and Certifications

  • Made to meet industry standards, the NB31000 uses premium, high-quality parts and craftsmanship to ensure trustworthy performance in maintenance and industrial environments. Every component is selected for durability and safety, ensuring the breaker stands up to long-term, heavy usage.

Suitability

  • If you’re responsible for keeping large-scale electrical systems running—whether in factories, commercial buildings, or infrastructure setups—this breaker is built for that scenario. It fits best in environments where high-Amperage circuits are the norm and dependable protection against overloads or short circuits is essential for uninterrupted uptime.

 


Use of Original Equipment Manufacturer (OEM) trademarks, names, and logos is for informational and identification purposes only. This does not imply any affiliation, sponsorship, endorsement, or approval by the original equipment manufacturer. All trademarks and registered trademarks are the property of their respective owners.

Specifications

  • Width:8.25
  • Height:16.0
  • Depth:5.5
  • Poles:3
  • Amperes:1000
  • A.I.C. Rating & Volts:22k @ 600VAC; 30k @ 480VAC; 42k @ 240VAC
  • Type:NB
  • Approx Dimensions:8.25"W x 16.00"L x 5.50"D
  • Additional Notes:40°C Rated, Thermal Magnetic Circuit Breaker With Interchangeable Trip Unit. This item includes load-side terminals.

Returns are easy

You may return unused items within 30 days of delivery for a full refund.

FREE shipping on breaker orders over $100 and all other items with orders over $500.

CIRCUIT BREAKER SUPERSTORE® offers one to five day delivery in the United States. The variation depends on the chosen shipping speed and the warehouse location for the product(s).

Same Day Shipping

We strive to ship out your items within one business day.

In rare circumstances, CIRCUIT BREAKER SUPERSTORE® may reserve up to 5 business days to complete shipment. Feel free to contact us if your order is time sensitive.

CIRCUIT BREAKER SUPERSTORE® provides a limited 1-year warranty on both new and reconditioned products. Rest assured, all products are authentic OEM (original equipment manufacturer).

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