QO340 - 40 Amp Circuit Breaker

QO340 - 40 Amp Circuit Breaker

When your electrical system calls for dependable circuit protection, the QO340 40 Amp 3-Pole Plug-On Circuit Breaker is built to get the job done. Designed for use in compatible Type QO load centers and panelboards, this breaker helps protect three-phase electrical circuits from overloads and short circuits, giving you confidence that your equipment and wiring are safeguarded during everyday operation.

With a 40 amp rating, 3-pole configuration, and a 10kA interrupting capacity at 240VAC, the QO340 is a practical choice for a wide range of commercial, industrial, and residential applications. Its plug-on design makes installation straightforward, helping electricians and maintenance professionals complete replacements or upgrades with less hassle. Whether you're servicing an existing panel or installing new equipment, this breaker delivers the dependable performance expected from the trusted Type QO family.

Key Features and Benefits

• 40 Amp Continuous Current Rating: 40 Amp continuous current rating for reliable circuit protection.
• 3-Pole Design: 3-pole design for three-phase electrical applications.
• Type QO Plug-On Configuration: Type QO plug-on configuration for quick installation in compatible panels.
• 10kA A.I.C. Rating at 240VAC: 10kA A.I.C. rating at 240VAC for dependable fault current interruption.
• Circuit Protection: Helps protect wiring and connected equipment from overloads and short circuits.
• Compact Footprint: Compact footprint fits compatible QO load centers and panelboards.
• Ideal for Replacements, Repairs, Maintenance, and System Upgrades: Ideal for replacements, repairs, maintenance, and system upgrades.
  

Technical Specifications

• Part Number: QO340
  
• Type: QO
  
• Breaker Style: Plug-On Circuit Breaker
  
• Poles: 3
  
• Amperage: 40 Amps
  
• Voltage Rating: 240VAC
  
• A.I.C. Rating: 10kA @ 240VAC
  
• Dimensions:
  • Height: 3.0 in.
  • Width: 2.25 in.
  • Depth: 2.5 in.

Material Compliance and Certifications

• Compatible Electrical Distribution Systems: Designed for use in compatible Type QO electrical distribution systems.
• Industry Standards: Manufactured to meet applicable industry standards for molded case circuit breakers.
• Installation Requirements: Install according to manufacturer recommendations and all applicable national and local electrical codes.
• Compatibility: Always verify compatibility with your panelboard or load center before installation.
  

Where It Works Best

• The QO340 40 Amp 3-Pole Circuit Breaker is a great fit anywhere reliable three-phase circuit protection is needed. It's commonly used in commercial buildings, industrial facilities, workshops, and residential properties with compatible Type QO panels. From HVAC equipment and motors to pumps, distribution circuits, and other three-phase loads, this breaker helps keep electrical systems operating safely and efficiently.