NB3700 - 700 Amp Circuit Breaker

NB3700 Circuit Breaker - 700 Amp Circuit Breaker

Looking for dependable, high‑capacity protection during maintenance of industrial and commercial electrical systems? Meet the NB3700 Circuit Breaker. This 700 A, three‑pole unit delivers serious overload and short‑circuit defense—and it’s built to perform in demanding conditions. Designed for use at temperatures up to 40 °C, the NB3700 ensures dependable operation even when heat levels rise, and the interchangeable thermal‑magnetic trip unit gives you the flexibility to adapt protection to your specific needs.

Key Features and Benefits

• High-Amp Protection: With a 700 A rating, the NB3700 is your go‑to choice for high‑current circuits that demand dependable safety during maintenance or operations.
• Thermal‑Magnetic Trip System: Comes with an easy‑to‑swap trip unit, so you can fine‑tune overload and short‑circuit response without replacing the whole breaker.
• Load‑Side Terminals Included: Designed for quick and easy hook‑up to your existing setup, cutting down on install time and complexity.
• Built for Heat: Rated to perform up to 40 °C, this breaker keeps working reliably even when temperatures climb.
• Compact Meets Power: Thoughtfully sized to fit most panels without sacrificing current‑handling ability—powerful, yet space‑smart.

Technical Specifications

• Amperage: 700 A
  
• Poles: 3‑pole design for three‑phase systems
  
• Interrupting Capacity (A.I.C.):
  • 22 kA @ 600 VAC
  • 30 kA @ 480 VAC
  • 42 kA @ 240 VAC
• Frame Type: NB series
  
• Temperature Rating: Up to 40 °C
  
• Mounting Style: Bolt‑on installation
  
• Trip Unit: Interchangeable thermal‑magnetic
  
• Terminals: Load‑side included
  
• Weight: Approx. 57 lb
  
• Dimensions:
  • Width: 8.25″
  • Length: 16.00″
  • Depth: 5.50″

Material Compliance and Certifications

• Built with high‑quality components and engineered to meet strict industry standards, the NB3700 ensures safety and reliability for maintenance applications. Whether you're managing a manufacturing floor or a commercial installation, this breaker is crafted to deliver dependable performance under real‑world pressure.

Suitability

• The NB3700 shines in industrial and commercial settings where large‑scale electrical systems must stay safe during repair or routine service. If you’re an electrician, contractor, or facility manager working with high‑current loads, this breaker is purpose‑built for applications where dependable protection and flexibility matter. From high‑heat environments to tightly packed panel spaces, the NB3700 keeps your operations solid and safe.