NGB3B050B - 50 Amp Circuit Breaker

NGB3B050B - 50 Amp Circuit Breaker

When you're replacing a circuit breaker in an existing panelboard, the details have to line up. The NGB3B050B is a 50-amp, 3-pole Type NGB molded-case circuit breaker made for panelboard mounting. It is rated 25k AIC at 480VAC and 100k AIC at 240VAC, with a 40.25C temperature rating and an HACR rating. The breaker measures 5.0 inches high, 3.0 inches wide, and 3.06 inches deep, giving you clear dimensions to compare with the existing breaker and panel space. Load-side terminals are included. This model is a good fit for maintenance and replacement work where the existing electrical equipment calls for the NGB3B050B configuration and matching electrical ratings. There aren't many extras to sort through—the key is getting the right breaker for the equipment already in place. For facilities keeping older electrical systems operating, this NGB molded case breaker provides a familiar form, fit, and function and is built to last when properly installed and used within its specified ratings.

Key Features and Benefits

• 50 amp rating for applications that require a 50A breaker.
• For compatible 3-pole electrical systems, this breaker requires three poles.
• The NGB construction suits equipment designed to accept this type of breaker.
• Panelboard-mount setup for panelboard installations that work with it.
• The rating is 25k AIC at 480VAC and 100k AIC at 240VAC.
• HACR is suitable for applications where this designation is required.
• The load-side terminals are included, meaning the breaker will keep the specified connection configuration.
• Clearly defined dimensions make it easier to confirm physical fit before installation.
• It is well suited to replacement and maintenance when the main requirement is matching the original breaker specifications.

Technical Specifications

• Part Number: NGB3B050B
  
• Product Type: Molded Case Circuit Breaker
  
• Type: NGB
  
• Amperage: 50 A
  
• Poles: 3
  
• AIC Rating: 25k @ 480VAC; 100k @ 240VAC
  
• Dimensions:
  • Height: 5.0 in.
  • Width: 3.0 in.
  • Depth: 3.06 in.
• Mounting: Panelboard Mount
  
• Temperature Rating: 40.25C
  
• HACR Rated: Yes
  
• Load-Side Terminals: Included
  

Material Compliance and Certifications

• The breaker, specifically the NGB3B050B, is HACR rated and has a temperature rating of 40.25C. These are the compliance and rating specifications for this type of breaker, and no other compliance specifications are mentioned in the available product information; therefore, you mustyou must verify any additional requirements for specific equipment and installation.

Where It Works Best

• This breaker is best suited for existing panelboards and older electrical equipment that require an NGB3B050B or a breaker with the same applicable form, fit, and electrical specifications; it is especially useful in maintenance situations where it is important to keep the original equipment configuration unchanged.