BR140 - 40 Amp Circuit Breaker

BR140 - 40 Amp Circuit Breaker

The Eaton BR140 is a 40 Amp single-pole circuit breaker for use in compatible Eaton Type BR loadcenters. Rated for 120/240VAC with a 10kAIC interrupting capacity, it's commonly used on branch circuits serving larger appliances, HVAC equipment, air conditioning units, workshop loads, and other applications requiring a 40 Amp breaker.

Because it uses Eaton's Type BR plug-on design, the BR140 is often selected when replacing an existing breaker in a compatible panel. Electricians, maintenance technicians, and facility managers frequently use breakers like this when matching panel specifications and circuit requirements. The compact one-inch format fits Eaton BR loadcenters and is intended for installations where a single-pole 40 Amp breaker is required.

You'll find BR series breakers installed in homes, apartment buildings, retail spaces, offices, workshops, and light commercial facilities throughout North America. Whether you're maintaining an existing panel or replacing a breaker with the same ratings, the BR140 is designed to provide the proper fit and function in compatible Eaton equipment. Like many Eaton breakers that stay in service for years, the BR140 is built to last when used within its intended ratings.

Key Features and Benefits

• 40 Amp current rating
• Single-pole breaker configuration
• Thermal-magnetic trip mechanism
• Type BR plug-on design
• Rated for 120/240VAC applications
• 10kAIC interrupting capacity
• Compatible with Eaton Type BR loadcenters
• Accepts #14–4 AWG copper or aluminum conductors
• One-inch breaker format
• Suitable for replacement, maintenance, and new installation projects

Technical Specifications

• Manufacturer: Eaton
  
• Catalog Number: BR140
  
• UPC: 786676362252
  
• Product Type: Thermal Magnetic Circuit Breaker
  
• Series: Type BR
  
• Amperage Rating: 40 Amps
  
• Number of Poles: 1
  
• Voltage Rating: 120/240VAC
  
• Interrupt Rating: 10kAIC
  
• Mounting Method: Plug-On
  
• Wire Size Compatibility: #14–4 AWG Copper/Aluminum
  
• Length: 3 in.
  
• Width: 1 in.
  
• Height: 3 in.
  
• Weight: 0.3 lb.
  

Material Compliance and Certifications

• UL 489 Listed
• Federal Specifications Classification W-C375
• Manufactured to Eaton specifications for Type BR circuit breakers
• Intended for installation in compatible Eaton Type BR loadcenters and panelboards
  

Where It Works Best

• The BR140 is commonly used in Eaton Type BR electrical panels installed in homes, apartments, offices, retail locations, workshops, and light commercial buildings. Typical applications include HVAC equipment, air conditioning circuits, appliance circuits, receptacle circuits, and other branch circuits requiring a 40 Amp single-pole breaker. It is also frequently used for maintenance and replacement projects where matching the existing breaker type and panel configuration is important.
• The Eaton BR140 is typically selected when a compatible 40 Amp Type BR breaker is needed for an existing panel. Verifying panel compatibility, amperage requirements, and circuit specifications helps ensure proper installation and operation.