NGB3B020B - 20 Amp Circuit Breaker

NGB3B020B - 20 Amp Circuit Breaker

Need an NGB3B020B circuit breaker for an existing panelboard? This Type NGB molded-case circuit breaker is a 20-amp, 3-pole unit made for compatible panelboard applications. It is rated 25k AIC at 480VAC and 100k AIC at 240VAC, with a specified temperature rating of 40.25°C. It's also HACR-rated. The breaker measures 5.0 inches high, 3.0 inches wide, and 3.06 inches deep, so you can compare its dimensions with the breaker you're replacing before installation. Load-side terminals are included. The NGB3B020B is a practical choice for maintaining compatible legacy electrical equipment when the original breaker type, amperage, pole configuration, mounting style, and interrupting ratings must match. No unnecessary extras, just the specifications you need to determine whether it fits the application. When matched to the equipment and used within its stated ratings, this component is built to last.

Key Features and Benefits

• 20-amp rating for applications that require a 20A breaker.
• Three poles for compatible 3-pole electrical configurations.
• Type NGB molded case circuit breaker design for matching applications.
• Rated 25k AIC at 480VAC and 100k AIC at 240VAC.
• HACR rated for compatible applications where this rating is required.
• Designed for panelboard mounting.
• Load-side terminals included with the breaker.
• Measures 5.0" H × 3.0" W × 3.06" D, making it easier to check physical fit before installation.
• Well suited to replacement and maintenance work where matching the existing breaker specifications is the priority.

Technical Specifications

• Part Number: NGB3B020B
  
• Product Type: Molded Case Circuit Breaker
  
• Type: NGB
  
• Amperes: 20A
  
• Poles: 3
  
• AIC Rating & Volts: 25k @ 480VAC; 100k @ 240VAC
  
• Mounting: Panelboard Mount
  
• Temperature Rating: 40.25°C
  
• HACR Rated: Yes
  
• Load-Side Terminals: Included
  
• Height: 5.0 in.
  
• Width: 3.0 in.
  
• Depth: 3.06 in.
  

Material Compliance and Certifications

• The NGB3B020B is HACR rated. No other material-compliance certifications are identified in the available specifications, so we assume none. If your installation has specific code, certification, or material requirements, check them against the equipment documentation and applicable electrical requirements.

Where It Works Best

• The NGB3B020B 20A 3-pole breaker is best suited to compatible panelboards and legacy electrical equipment that call for the Type NGB configuration. It makes particular sense for repair and maintenance work where you're trying to match an existing breaker rather than change the system configuration.
• Before using the NGB3B020B as a replacement, check the key details: 20A amperage, three poles, Type NGB configuration, panelboard mounting, voltage and AIC ratings, physical dimensions, and terminal requirements. A breaker can look like the right one but still have different electrical or mounting specifications, so matching the part number and equipment requirements matters.