QOU140 - 40 Amp Circuit Breaker

QOU140 - 40 Amp Circuit Breaker

When you need dependable circuit protection without wasting space, the Schneider Electric Square D QOU140 40 Amp Miniature Circuit Breaker offers a practical solution for residential and commercial electrical systems. As part of the Square D QOU series, this single-pole, thermal-magnetic circuit breaker protects electrical circuits against overloads and short circuits while providing convenient manual switching.

Key Features and Benefits

• 40-Amp Circuit Protection: Rated for 40 amps, the QOU140 helps protect properly sized electrical circuits against overload and short-circuit conditions.
• Single-Pole Configuration: Its single-pole design suits compatible single-pole circuit applications in residential, commercial, and equipment installations.
• Thermal-Magnetic Protection: Combines thermal overload protection with magnetic short-circuit protection to address different overcurrent conditions.
• VisiTrip Trip Indication: A visual trip indicator helps maintenance personnel quickly see when the breaker has tripped, making circuit identification and troubleshooting easier.
• AC and DC Application Capability: Manufacturer-specified voltage ratings include 120/240VAC, 120VAC, and 48VDC, allowing use in compatible systems when all applicable electrical ratings are satisfied.

Technical Specifications

• Manufacturer: Schneider Electric
  
• Brand: Square D
  
• Catalog Number: QOU140
  
• Product Series: QOU
  
• Product Type: Miniature molded case circuit breaker
  
• Circuit Breaker Type: Standard
  
• Rated Current: 40 Amps
  
• Number of Poles: 1
  
• Trip Mechanism: Thermal-magnetic
  
• Trip Indication: VisiTrip visual trip indication
  
• Rated Operational Voltage: 120/240VAC, 120VAC, and 48VDC
  
• AC Interrupting Rating: 10kA at 120/240VAC
  
• Additional AC Interrupting Rating: 10kA at 120VAC
  
• Application Rating: HACR rated
  
• Mounting Mode: Unit mount
  
• Mounting Options: DIN rail, surface, or flush mounting with appropriate mounting accessories
  
• Line-Side Connection: Slotted box lug
  
• Load-Side Connection: Slotted box lug
  
• Compatible Conductor Material: Aluminum or copper
  
• Conductor Size Range: 14 AWG to 2 AWG, subject to applicable conductor and installation requirements
  
• Terminal Tightening Torque: 45 lbf-in (5.08 N·m)
  
• Height: 4.05 inches (102.87 mm)
  
• Width: 0.75 inches (19.05 mm)
  
• Depth: 2.95 inches (74.93 mm)
  
• Country of Origin: Mexico
  
• Manufacturer-Stated Warranty: 18 months
  

Material Compliance and Certifications

• UL Listed
• CSA Certification
• IEC Certification
• Manufacturer-Verified Specifications
• HACR Application Rating

Where It Works Best

• Residential Electrical Circuit Protection
  
• Commercial Electrical Installations
  
• HVAC Equipment Circuits
  
• Heating and Refrigeration Equipment
  
• Electrical Control Panels
  
• Equipment Disconnecting and Switching Applications
  
• DIN Rail-Mounted Electrical Assemblies
  
• Surface-Mounted Electrical Enclosures
  
• Flush-Mounted Electrical Installations
  
• Compatible 40-Amp AC Circuits
  
• Compatible 48VDC Electrical Circuits
  
• Electrical Equipment Maintenance and Repairs
  
• Industrial Equipment Auxiliary Circuits
  
• Space-Constrained Electrical Assemblies