QB40 - 40 Amp Circuit Breaker

QB40 - 40 Amp Circuit Breaker

The QB40 is a 40-amp single-pole bolt-on circuit breaker made for your compatible QB-type electrical panels. It is rated for 120VAC applications and features a 10kA A.I.C. rating, helping you protect connected circuits from damage caused by overloads and short circuits.

For electrical repair and maintenance work, using the correct breaker specifications is important. The QB40 offers a 1-pole design, bolt-on installation, and a compact size that makes it a practical replacement option for systems requiring this type of breaker. Its narrow 0.75-inch width allows it to fit neatly into compatible panel configurations without taking up extra space.

Electricians, contractors, and facility maintenance teams often rely on bolt-on breakers for panel repairs, equipment servicing, and electrical upgrades. The QB40 provides the amp rating, mounting style, and interruption capacity needed for applications where a QB-style breaker is specified.

Key Features and Benefits

• 40 Amp Rating: Suitable for circuits requiring 40 amps of protection at 120VAC.
• Single-Pole Design: Intended for applications requiring a one-pole breaker configuration.
• Bolt-On Installation: Attaches securely to compatible QB breaker panels.
• 10kA A.I.C. Rating: Rated to interrupt up to 10,000 amps of fault current at 120VAC.
• Compact Dimensions: Measures 4.81 inches high, 0.75 inches wide, and 2.5 inches deep.
• Useful for Replacement Projects: A good fit for electrical maintenance and breaker replacement applications.

Technical Specifications

• Part Number: QB40
  
• Type: QB
  
• Mounting: Bolt-On
  
• Poles: 1
  
• Amperage: 40 Amps
  
• Voltage: 120VAC
  
• A.I.C. Rating: 10kA @ 120VAC
  
• Height: 4.81 inches
  
• Width: 0.75 inches
  
• Depth: 2.5 inches
  

Material Compliance and Certifications

• The QB40 is intended for use in electrical distribution applications where proper breaker selection and panel compatibility are required. Always check the panel specifications and installation requirements before replacing an existing circuit breaker.

Where It Works Best

• The QB40 40 Amp Single Pole Bolt-On Circuit Breaker is best suited for compatible commercial, industrial, and facility electrical systems. It is commonly used for panel maintenance, replacement work, and electrical service applications where a QB-type bolt-on breaker is needed.
  
• With its 40-amp rating, single-pole configuration, and bolt-on design, the QB40 is a straightforward choice for professionals looking for a properly specified replacement circuit breaker.