NFJ621175 - 175Amp Circuit Breaker

NFJ621175 - 175Amp Circuit Breaker

The NFJ621175 175 amp circuit breaker is designed to deliver dependable overcurrent protection for demanding electrical systems in commercial and industrial settings. As a 2-pole, thermal magnetic molded case circuit breaker, it responds quickly to both overloads and short circuits, helping protect equipment, wiring, and connected loads from costly damage. Built on the NFJ frame with a secure bolt-on mounting design, this breaker provides a stable, tight connection to the panelboard bus. Its molded case housing is engineered for strength and long service life, while integrated load-side lug terminals simplify installation and ensure solid conductor termination. Rated for performance in 40°C environments, the NFJ621175 is well-suited for facilities that require consistent, high-amperage protection you can count on.

Key Features and Benefits

• 175 Amp Rating for High-Demand Applications: Handles substantial electrical loads, making it ideal for heavy-duty commercial and industrial circuits.
• Thermal Magnetic Trip Mechanism: Combines thermal overload protection with instantaneous magnetic short-circuit response for accurate and reliable circuit interruption.
• 2-Pole Configuration: Designed for 240V and 480V systems requiring two-pole protection.
• Bolt-On Mounting Design: Provides a secure mechanical and electrical connection to the panelboard, reducing the risk of loose connections.
• Molded Case Construction: Built for durability and consistent performance in demanding electrical environments.
• Load-Side Lug Terminals Included: Allows for straightforward wiring and dependable conductor connections.
  

Technical Specifications

• Model: NFJ621175
  
• Amperage Rating: 175 Amps
  
• Number of Poles: 2
  
• Trip Type: Thermal Magnetic
  
• A.I.C. Rating: 22kA @ 480VAC; 25kA @ 240VAC
  
• Voltage Rating: Up to 480VAC
  
• Frame Type: NFJ
  
• Mounting Style: Bolt-On
  
• Dimensions:
  • Width: 4.13 inches
  • Length: 9.31 inches
  • Depth: 3.75 inches
• Operating Temperature Rating: 40°C
  
• Approximate Shipping Weight: 12 lbs
  

Material Compliance and Certifications

• Industry Standards: The NFJ621175 2-pole 175A circuit breaker is manufactured to meet established industry safety and performance standards for molded case circuit breakers.
• Construction: Constructed from high-quality insulating and conductive materials, it is designed to deliver reliable protection in professional electrical installations while aligning with applicable compliance requirements for commercial and industrial use.
  

Where It Works Best

• This 175 amp bolt-on circuit breaker is a strong fit for commercial buildings, industrial facilities, and large residential applications that require dependable high-amperage protection. It is commonly used in panelboards supporting HVAC systems, distribution panels, machinery circuits, and other heavy-load equipment. Whether you are performing scheduled maintenance or replacing an existing NFJ frame breaker, the NFJ621175 offers a practical and dependable solution for maintaining safe, efficient electrical operation.