NGB1B090B - 90 Amp Circuit Breaker

NGB1B090B - 90 Amp Circuit Breaker

When you're replacing a breaker in an existing panelboard, getting the details right matters. The NGB1B090B is a 90-amp, 1-pole Type NGB molded-case circuit breaker designed for compatible panelboard applications. It has an interrupting rating of 25kA at 277VAC and 100kA at 120VAC, is HACR rated, and includes load-side terminals. The breaker measures 5.0 inches high, 1.0 inch wide, and 3.06 inches deep, with a listed temperature specification of 40.25°C. For maintenance work on legacy electrical equipment, this model makes sense when the existing system calls for the same NGB configuration, mounting style, amperage, and electrical ratings. Rather than choosing a breaker based on amperage alone, compare the full specifications with the breaker being replaced and the panelboard requirements. If those details match, the NGB1B090B provides the form, fit, and function needed for the intended application. When properly installed and used within its stated ratings, it is built to last.

Key Features and Benefits

• 90A rating for applications requiring a 90-amp breaker.
• Single-pole design for compatible 1-pole panelboard positions.
• Type NGB configuration for matching existing NGB applications.
• Rated 25kA at 277VAC and 100kA at 120VAC.
• Panelboard mount for use with compatible equipment.
• HACR rated for applications where this rating is required.
• Load-side terminals included.
• Compact 5.0" H × 1.0" W × 3.06" D dimensions help when checking physical fit.
• Made for lasting service when correctly selected, installed, and maintained.

Technical Specifications

• Part Number: NGB1B090B
  
• Type: NGB
  
• Breaker Type: Molded Case Circuit Breaker
  
• Amperes: 90A
  
• Poles: 1
  
• A.I.C. Rating & Volts: 25kA @ 277VAC; 100kA @ 120VAC
  
• Mounting: Panelboard Mount
  
• HACR Rated: Yes
  
• Temperature Specification: 40.25°C
  
• Load-Side Terminals: Included
  
• Height: 5.0 in.
  
• Width: 1.0 in.
  
• Depth: 3.06 in.
  

Material Compliance and Certifications

• The NGB1B090B is HACR rated and has a listed temperature specification of 40.25°C. No other material-compliance declarations or certifications were provided with the available specifications, so do not assume additional certifications.
• Always check the breaker and panelboard requirements before installation. Part number, voltage, amperage, pole count, interrupting rating, mounting method, and physical dimensions are all important when confirming compatibility.

Where It Works Best

• The NGB1B090B is a good fit for maintenance and replacement work involving compatible Type NGB panelboards and legacy electrical equipment. It is especially relevant when the job calls for a 90A, single-pole breaker with the same mounting arrangement and electrical ratings as the existing unit.
• For replacement applications, start with the existing breaker, not just the amp rating. Check the NGB1B090B part number, Type NGB designation, pole count, voltage, and A.I.C. ratings, mounting style, and dimensions. Matching those details helps ensure the replacement has the correct form, fit, and function for the equipment.