NGB1B020B - 20 Amp Circuit Breaker

NGB1B020B - 20 Amp Circuit Breaker

When you're replacing a breaker in an existing panelboard, getting the details right matters. The NGB1B020B is a 20-amp, 1-pole Type NGB molded-case circuit breaker made for panelboard mounting in compatible electrical equipment. It is rated 25k AIC at 277VAC and 100k AIC at 120VAC, is HACR rated, and includes load-side terminals. The breaker measures approximately 5.0 inches high, 1.0 inch wide, and 3.06 inches deep. Those dimensions, along with the NGB type and electrical ratings, are worth checking carefully when matching a breaker to an existing installation. For electricians and maintenance teams working on legacy equipment, the NGB1B020B can provide the needed form, fit, and function when the panelboard was designed for this particular breaker configuration. It's a straightforward, built-to-last component for applications where the original NGB1B020B specifications need to be maintained.

Key Features and Benefits

• 20A, 1-pole design for systems that specifically require this amperage and pole configuration.
• Type NGB molded case circuit breaker for use with compatible electrical equipment.
• Panelboard mount configuration helps maintain the intended fit in applications designed for this breaker.
• Rated 25k AIC at 277VAC and 100k AIC at 120VAC.
• HACR rated for compatible applications where an HACR-rated breaker is specified.
• Load-side terminals are included.
• Compact 5.0" H x 1.0" W x 3.06" D dimensions make it easier to compare the breaker with an existing unit before installation.
• A practical choice for maintenance and replacement in compatible legacy electrical systems where matching the original specifications is important.

Technical Specifications

• Part Number: NGB1B020B
  
• Type: NGB
  
• Product Type: Molded Case Circuit Breaker
  
• Amperage: 20A
  
• Poles: 1
  
• AIC Rating: 25k @ 277VAC; 100k @ 120VAC
  
• Mounting: Panelboard Mount
  
• Height: 5.0 in.
  
• Width: 1.0 in.
  
• Depth: 3.06 in.
  
• Temperature Specification: 40.25°C
  
• HACR Rated: Yes
  
• Load-Side Terminals: Included
  

Material Compliance and Certifications

• The NGB1B020B is HACR rated. Beyond that designation, no additional material-compliance or certification information is included in the available specifications. If a particular certification or material standard is required for your project, it should be confirmed against the applicable equipment or product documentation.

Where It Works Best

• The NGB1B020B makes the most sense when you're maintaining an existing panelboard or legacy electrical system that calls for a Type NGB 20A, 1-pole breaker. It's especially relevant when the goal is to replace an existing breaker while preserving the original equipment configuration rather than changing the system around it.
• A quick word about fit: two breakers can share the same amperage and still not be interchangeable. Check the part number, breaker type, number of poles, mounting method, physical dimensions, voltage, AIC rating, and terminal arrangement against your existing equipment. If those specifications match what your panelboard requires, the NGB1B020B is suited to that form, fit, and functional replacement application.