NB100 - 100Amp Circuit Breaker

NB100 - 100Amp Circuit Breaker

The NB100 100 amp circuit breaker is engineered to deliver dependable overcurrent protection for residential and commercial electrical systems. Designed with a dual-pole configuration and rated at 100 amps, this NB frame breaker helps protect 120/240VAC circuits from overloads and short circuits. Its bolt-on mounting style provides a firm, stable connection to the panelboard bus, which is essential for maintaining electrical system integrity over time. Built with a thermal magnetic trip unit, the NB100 circuit breaker responds accurately to both prolonged overload conditions and instantaneous short-circuit faults, helping reduce the risk of equipment damage and unexpected downtime.

Key Features and Benefits

• 100 Amp Rating: Designed to handle 100A loads, making it suitable for higher-demand branch circuits and feeder applications.
• Dual-Pole Protection: Simultaneously protects two conductors, ideal for 120/240V systems requiring coordinated disconnection.
• Bolt-On Installation: Provides a secure mechanical and electrical connection to the panelboard, minimizing the chance of loose terminations.
• Thermal Magnetic Trip Mechanism: Combines inverse time thermal protection for overloads with magnetic protection for short circuits, delivering reliable and consistent performance.
• Compact NB Frame Design: Space-efficient construction allows for effective use of panel space without sacrificing protection.
• Durable Construction: Built with quality materials to withstand everyday operating demands in both residential and light commercial environments.

Technical Specifications

• Amperage Rating: 100 Amps
  
• Poles: 2
  
• Voltage Rating: 120/240 VAC
  
• Interrupting Rating: 10kAIC @ 120/240VAC
  
• Frame Type: NB
  
• Installation Type: Bolt-On
  
• Dimensions: 2.00" W x 4.25" L x 2.31" D
  
• Ship Weight: 2.25 lbs
  

Material Compliance and Certifications

• The NB100 100A circuit breaker is manufactured to meet applicable industry standards for safety and performance. Its construction materials and internal components are selected to ensure consistent operation under rated conditions. Designed for use in properly rated electrical distribution equipment, this breaker supports compliance with established electrical codes when installed according to manufacturer specifications and local regulations.

Where It Works Best

• The NB100 dual pole 100 amp bolt-on circuit breaker is well-suited for maintenance, replacement, or upgrade projects in residential and commercial electrical panels using NB frame breakers. It performs reliably in applications where secure mounting and dependable overcurrent protection are critical—such as feeder circuits, subpanels, and higher-load branch circuits. Electricians and facility maintenance professionals often rely on this type of breaker to help maintain safe, code-compliant electrical distribution systems in homes, office buildings, retail spaces, and light industrial settings.