NGB1B045B - 45 Amp Circuit Breaker

NGB1B045B - 45 Amp Circuit Breaker

Need an NGB1B045B circuit breaker for an existing panelboard? This Type NGB molded case circuit breaker is a 45 amp, 1-pole unit made for panelboard mounting in compatible electrical equipment. It measures 5.0 inches high, 1.0 inch wide, and 3.06 inches deep so that you can compare its physical size with the breaker already in place before installation. The NGB1B045B carries an interrupting rating of 25k A.I.C. at 277VAC and 100k A.I.C. at 120VAC. It is also HACR-rated and includes load-side terminals. For maintenance crews, electricians, and facility teams working with older electrical equipment, the main advantage is simple: you can match the part number, amperage, pole count, mounting style, dimensions, and electrical ratings to the existing system's requirements. When those specifications line up, the NGB1B045B can serve as a form-, fit-, and functional replacement in the right application. It's a straightforward breaker made for a specific job—and built to last.

Key Features and Benefits

• 45-amp rating for applications that specifically call for a 45A breaker.
• 1-pole configuration for compatible single-pole circuits.
• Type NGB molded case design for use with equipment requiring this breaker style.
• Panelboard mount configuration for compatible panelboard installations.
• Rated 25k A.I.C. at 277VAC and 100k A.I.C. at 120VAC.
• HACR rated for applicable heating, air-conditioning, and refrigeration circuit applications.
• Load-side terminals included for the intended connection arrangement.
• Compact 5.0" H × 1.0" W × 3.06" D dimensions make it easier to check physical compatibility.
• Well suited to maintenance and replacement work in compatible legacy electrical systems.

Technical Specifications

• Part Number: NGB1B045B
  
• Type: NGB
  
• Breaker Type: Molded Case Circuit Breaker
  
• Amperage: 45 A
  
• Poles: 1
  
• A.I.C. Rating & Volts: 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 NGB1B045B is HACR rated for applicable heating, air-conditioning, and refrigeration circuit applications. The supplied specifications do not identify any additional material-compliance declarations or certifications, so we assume none. If your installation has specific certification or material-compliance requirements, check the breaker markings and the applicable equipment documentation before use.

Where It Works Best

• The NGB1B045B makes the most sense when you're maintaining a panelboard or older electrical distribution system that already calls for this particular Type NGB breaker configuration. It's especially relevant when the job is about keeping an existing system operating with the correct form, fit, and electrical characteristics rather than changing the equipment configuration.
• One thing worth checking carefully: 45 amps alone doesn't determine compatibility. Confirm the NGB type, single-pole configuration, mounting method, dimensions, terminal arrangement, voltage, and A.I.C. ratings against the breaker being replaced and the panelboard requirements.