NEB3B090B - 90Amp Circuit Breaker

NEB3B090B - 90Amp Circuit Breaker

Need to replace an NEB3B090B circuit breaker in an existing panelboard? Start by matching the original breaker specifications. The NEB3B090B is a 90-amp, 3-pole molded case circuit breaker with a panelboard-mount design and compact dimensions of 5.5" H x 3.0" W x 3.0" D. Its interrupting ratings are 35k AIC at 480VAC and 85k AIC at 240VAC. The breaker is also HACR rated, has a 40°C rating, and includes load-side terminals. Those details matter most when you're working on an existing electrical system, and the breaker must match the required mounting arrangement, size, amperage, number of poles, and electrical ratings. For electricians, maintenance departments, and facility teams maintaining compatible legacy equipment, the NEB3B090B offers the familiar form, fit, and function needed for the application. It's a straightforward, built-to-last electrical component designed to perform in the specified operating conditions.

Key Features and Benefits

• 90-amp rating for applications requiring a 90A circuit breaker.
• Three-pole design for compatible three-pole electrical systems.
• NEB molded case configuration helps match existing equipment that calls for this breaker type.
• Panelboard mount for the appropriate panelboard installation.
• Rated 35k AIC at 480VAC and 85k AIC at 240VAC.
• HACR rated for applications where an HACR-rated breaker is specified.
• 40°C rating for its intended operating conditions.
• Load-side terminals included for the appropriate connection setup.
• Compact 5.5" x 3.0" x 3.0" dimensions make physical compatibility easier to verify before installation.
• Well suited for replacement work where maintaining the required form, fit, and electrical function is the priority.
  

Technical Specifications

• Part Number: NEB3B090B
  
• Type: NEB
  
• Product Type: Molded Case Circuit Breaker
  
• Amperage: 90A
  
• Poles: 3
  
• AIC Rating: 35k @ 480VAC; 85k @ 240VAC
  
• Temperature Rating: 40°C
  
• HACR Rated: Yes
  
• Mounting: Panelboard Mount
  
• Height: 5.5 in.
  
• Width: 3.0 in.
  
• Depth: 3.0 in.
  
• Terminals: Load-Side Terminals Included
  

Material Compliance and Certifications

• The NEB3B090B is HACR-rated and rated for 40 °C. Its listed interrupting capacities are 35k AIC at 480VAC and 85k AIC at 240VAC.
• When replacing a breaker, don't rely on amperage alone. Check the complete part number along with the pole configuration, voltage, interrupting capacity, dimensions, mounting style, and terminal arrangement. The breaker must also meet the requirements of the panelboard and the electrical system where it will be installed. Always follow applicable electrical codes and equipment documentation.
  

Where It Works Best

• The NEB3B090B makes the most sense in compatible panelboards and existing electrical distribution systems that were designed around the NEB breaker configuration. It's particularly useful for maintenance and replacement projects where the goal isn't to change the existing equipment; you need a breaker with the correct application specifications.
• If the existing equipment calls for a 90A, 3-pole NEB molded case circuit breaker, check the nameplate and system requirements against the NEB3B090B specifications before installation. Pay particular attention to the 35 kAIC at 480VAC / 85 kAIC at 240VAC ratings, physical dimensions, mounting configuration, and terminals.