NEF431090 - 90Amp Circuit Breaker

NEF431090 - 90Amp Circuit Breaker

The NEF431090 90 Amp circuit breaker is a 3-pole, bolt-on molded case breaker built for dependable performance in commercial and industrial electrical systems. Designed with a thermal magnetic trip unit, it protects your equipment from overloads and short circuits before they turn into costly downtime. If you’re maintaining or replacing a breaker in an NEF frame panelboard, this model offers a straightforward fit and solid, consistent protection at both 480VAC and 240VAC applications. It’s a practical solution for keeping existing electrical distribution systems operating safely and efficiently.

Key Features and Benefits

• 90 Amp, 3-Pole Configuration: Designed for three-phase power systems commonly found in commercial and industrial facilities.
• Thermal Magnetic Protection: Combines long-time overload protection with fast short-circuit response to help safeguard wiring and connected equipment.
• Bolt-On Mounting: Secures directly to the bus for a stable connection and dependable performance.
• High Interrupting Capacity: Rated 14kA at 480VAC and 18kA at 240VAC to handle fault conditions with confidence.
• Compact NEF Frame Design: Fits properly in compatible panelboards without unnecessary modifications.

Technical Specifications

• Model Number: NEF431090
  
• Amperage: 90A
  
• Poles: 3
  
• Voltage Rating: Up to 480VAC
  
• Interrupting Rating:
  • 14kA @ 480VAC
  • 18kA @ 240VAC
• Frame Type: NEF
  
• Trip Type: Thermal Magnetic
  
• Mounting Type: Bolt-On
  
• Dimensions: 4.13" W x 6.19" L x 3.38" D
  
• Breaker Type: Molded Case Circuit Breaker
  

Material Compliance and Certifications

• Industry Standards: The NEF431090 circuit breaker is manufactured to meet recognized electrical safety and performance standards.
• Certifications: It complies with applicable UL, IEC, and other industry certifications, confirming that it has been tested for proper fault interruption and operational reliability in approved applications.

Where It Works Best

• This 90 Amp NEF bolt-on circuit breaker is commonly used in commercial buildings, manufacturing plants, schools, healthcare facilities, and other three-phase electrical distribution systems. It’s particularly suited for maintenance and replacement projects where maintaining system integrity and minimizing downtime are priorities. If you need dependable overload and short-circuit protection in an NEF frame panelboard, the NEF431090 is a proven fit.