NEB3B050B - 50Amp Circuit Breaker

NEB3B050B - 50Amp Circuit Breaker

Need to replace an NEB3B050B circuit breaker in an existing panelboard? This 50-amp, 3-pole molded-case circuit breaker is a Type NEB breaker intended for compatible panelboard applications. It is rated 35k AIC at 480VAC and 85k AIC at 240VAC, with a 40°C rating and HACR rating. The breaker measures about 5.5 inches high, 3 inches wide, and 3 inches deep, and includes load-side terminals. Check those details closely when you're matching a breaker already installed in older electrical equipment. For maintenance work and replacement applications, the NEB3B050B helps keep the original setup intact without changing the basic system configuration. It's a straightforward, purpose-built breaker designed to fit its intended application and last when properly installed and used within its specified ratings.

Key Features and Benefits

• 50-amp, 3-pole design for equipment requiring this specific configuration.
• Type NEB construction for compatible panelboard applications.
• Rated 35k AIC at 480VAC and 85k AIC at 240VAC.
• HACR rated for compatible heating, air-conditioning, and refrigeration applications where required.
• 40°C rated to match applications calling for this temperature rating.
• Panelboard mount design for equipment intended to accept the NEB configuration.
• Load-side terminals included as part of the breaker setup.
• Compact 5.5" x 3.0" x 3.0" dimensions make it easier to compare the physical size with the breaker being replaced.
• Built to last when correctly installed and operated within its stated ratings.
  

Technical Specifications

• Part Number: NEB3B050B
  
• Type: NEB
  
• Product Type: Molded Case Circuit Breaker
  
• Amperage: 50A
  
• Poles: 3
  
• AIC Rating & Voltage: 35k @ 480VAC; 85k @ 240VAC
  
• Temperature Rating: 40°C
  
• HACR Rated: Yes
  
• Mounting: Panelboard Mount
  
• Load-Side Terminals: Included
  
• Height: 5.5 in.
  
• Width: 3.0 in.
  
• Depth: 3.0 in.
  

Material Compliance and Certifications

• The NEB3B050B is HACR rated and carries a 40°C rating according to the available specifications. Its stated interrupting ratings are 35k AIC at 480VAC and 85k AIC at 240VAC.
• The available specifications provide no other material-compliance or certification information, so don't assume additional certifications. For installations with specific code, listing, or project requirements, check the markings on the breaker and the documentation for the equipment it will be installed in.
  

Where It Works Best

• The NEB3B050B makes the most sense when you're maintaining an existing panelboard or legacy electrical system that was designed around a Type NEB 50 amp, 3-pole breaker. In these applications, matching the breaker isn't just about finding the same amperage. The physical size, number of poles, mounting arrangement, voltage, interrupting rating, and terminal configuration all matter.
• That's why you should compare the full specifications before making a replacement. Check the NEB3B050B part number, 50A rating, three-pole configuration, AIC and voltage ratings, dimensions, panelboard mounting style, and terminal requirements against the breaker and equipment already in place.
• When those specifications match the existing system requirements, the NEB3B050B can provide the form, fit, and function needed for the application. Qualified electrical personnel should handle installation and complete it in accordance with applicable electrical codes and equipment requirements.