NB231090 - 90Amp Circuit Breaker

NB231090 - 90Amp Circuit Breaker

The NB231090 is a 90 amp, 3 pole thermal magnetic circuit breaker designed for dependable overcurrent protection in three-phase electrical systems. If you're working on a commercial panel or maintaining a higher-load application, this breaker is built to handle the job. With a bolt-on connection, it fastens securely to the panelboard bus, helping ensure a solid, stable installation. The 90A rating makes it a strong fit for equipment and distribution circuits that demand consistent, properly rated protection. Built with a thermal magnetic trip mechanism, the NB231090 responds to both overloads and short circuits, helping protect wiring and connected equipment from damage.

Key Features and Benefits

• 90 Amp Rating: Designed for circuits that require higher current capacity in commercial or industrial settings.
• 3 Pole Configuration: Ideal for three-phase power distribution and multi-phase equipment.
• Thermal Magnetic Trip: Protects against overload conditions (thermal) and short circuits (magnetic).
• Bolt-On Mounting: Secures firmly to the panelboard for improved stability and long-term reliability.
• Reliable Performance: Built for consistent tripping within its rated specifications.
  

Technical Specifications

• Model: NB231090
  
• Amperage: 90A
  
• Poles: 3
  
• Voltage Rating: 120/240VAC
  
• Interrupting Rating: 10kA @ 120/240VAC
  
• Frame Type: NB
  
• Dimensions:
  • Width: 3.00"
  • Length: 3.38"
  • Depth: 2.31"
• Weight: 2.75 lbs
  

Material Compliance and Certifications

• Applicable Standards: The NB231090 90 amp circuit breaker is manufactured to meet applicable electrical safety standards for performance and protection.
• Operational Ratings: When installed correctly in compatible equipment, it operates within its listed voltage and interrupting ratings.
• Thermal Magnetic Trip System: The calibrated thermal magnetic trip system is engineered for accurate and repeatable response under fault conditions.
  

Where It Works Best

• This 90A 3 pole bolt-on circuit breaker is commonly used in commercial buildings, industrial facilities, and larger residential properties with three-phase service. It works well in panelboards supporting HVAC systems, motors, distribution equipment, and other higher-demand loads. For electricians replacing an existing NB frame breaker or servicing a panel that requires a 90 amp three-pole unit, the NB231090 offers a straightforward and dependable solution.