QOB340 - 40 Amp Circuit Breaker

QOB340 - 40 Amp Circuit Breaker

When dependable circuit protection matters, the QOB340 3-Pole 40 Amp Bolt-On Circuit Breaker is built to help keep your electrical system operating safely and efficiently. Designed for use in compatible Type QOB panelboards and load centers, this breaker provides reliable protection against overloads and short circuits while offering the added security of a bolt-on mounting design. Unlike plug-in breakers, the bolt-on connection helps create a more secure installation, making it an excellent choice for commercial and industrial environments where equipment reliability is a priority.

Rated at 40 amps with a 10kA interrupting capacity at 240VAC, the QOB340 is well suited for protecting three-phase branch circuits that serve HVAC equipment, lighting systems, machinery, motor loads, and other critical electrical equipment. Its compact design allows it to fit neatly into compatible electrical panels without sacrificing performance. Whether you're replacing an existing breaker during routine maintenance or completing a new installation, the QOB340 delivers the dependable protection professionals expect to keep electrical systems running smoothly.

Key Features and Benefits

• 40 Amp Rating: 40 Amp rating for dependable branch circuit protection.
• Three-Pole Design: Three-pole design for three-phase electrical systems.
• Bolt-On Mounting: Bolt-on mounting helps provide a secure, long-lasting electrical connection.
• 10kA Interrupting Capacity: 10kA interrupting capacity at 240VAC helps protect equipment during fault conditions.
• Type QOB Compatibility: Designed for use in compatible Type QOB panelboards and load centers.
• Compact Size: Compact size makes installation straightforward in compatible electrical equipment.
• Circuit Protection: Helps safeguard wiring and connected equipment from overloads and short circuits.
• Versatile Applications: Ideal for both replacement projects and new electrical installations.
  

Technical Specifications

• Part Number: QOB340
  
• Type: QOB
  
• Mounting Style: Bolt-On
  
• Poles: 3
  
• Amperage: 40 Amps
  
• Voltage Rating: 240VAC
  
• Interrupting Capacity: 10kA
  
• Dimensions:
  • Height: 3.0 in.
  • Width: 2.25 in.
  • Depth: 2.5 in.

Material Compliance and Certifications

• Industry Standards: The QOB340 is manufactured for use in compatible electrical distribution systems and is designed to meet applicable industry performance standards for molded case circuit breakers.
• Installation Guidance: Always install the breaker in approved equipment and follow all applicable electrical codes and manufacturer recommendations. If your project requires specific certifications or compliance documentation, verify those requirements before installation.
  

Where It Works Best

• The QOB340 is a dependable solution for protecting electrical circuits in a wide range of applications, including:
  • Commercial office buildings
  • Industrial facilities
  • Retail stores
  • Schools and universities
  • Healthcare facilities
  • Warehouses and distribution centers
  • HVAC systems
  • Three-phase lighting circuits
  • Motor branch circuits
  • Electrical panel upgrades and maintenance projects
  Whether you're maintaining an existing electrical system or completing a new installation, the QOB340 Bolt-On Circuit Breaker provides the secure fit, dependable protection, and reliable performance needed to help keep your electrical distribution system operating with confidence.