BR340 - 40 Amp Circuit Breaker

BR340 - 40 Amp Circuit Breaker

If you're working in an Eaton Type BR panel and need a 40 Amp, 3-pole breaker, the BR340 is typically used for that application. Designed for compatible Eaton Type BR loadcenters, this thermal-magnetic circuit breaker is commonly installed on three-phase circuits serving equipment such as HVAC systems, pumps, compressors, motors, and other electrical loads that require a 40 Amp breaker.

Rated for 240V AC systems, the BR340 carries a 10 kAIC interrupting rating and accepts #14–4 AWG copper or aluminum conductors. You'll often find this breaker in commercial buildings, workshops, agricultural facilities, mechanical rooms, and light industrial environments where three-phase power is used.

Key Features and Benefits

• 40 Amp circuit breaker rating
• Three-pole configuration
• Thermal-magnetic trip mechanism
• Common-trip operation
• Type BR plug-on design
• Compatible with Eaton Type BR loadcenters
• Rated for 240V AC applications
• 10 kAIC interrupting capacity
• Accepts #14–4 AWG copper or aluminum conductors
• Frequently used for HVAC equipment, motors, pumps, and compressors
  

Technical Specifications

• Manufacturer: Eaton
  
• Catalog Number: BR340
  
• UPC: 786676367851
  
• Product Type: Thermal Magnetic Circuit Breaker
  
• Series: Type BR
  
• Circuit Breaker Type: BR
  
• Amperage Rating: 40 Amps
  
• Voltage Rating: 240V AC
  
• Number of Poles: 3
  
• Trip Type: Common Trip
  
• Mounting Method: Plug-On
  
• Interrupt Rating: 10 kAIC
  
• Wire Size Compatibility: #14–4 AWG Copper/Aluminum
  
• Used With: Type BR Loadcenters
  
• Dimensions:
  • Depth: 3 in.
  • Width: 3 in.
  • Height: 2.75 in.
• Weight: 0.94 lb
  

Material Compliance and Certifications

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

Where It Works Best

• The Eaton BR340 is commonly found in commercial buildings, warehouses, workshops, agricultural facilities, mechanical rooms, and light industrial environments where three-phase circuit protection is required. You'll often see it protecting HVAC equipment, pumps, compressors, motor-driven machinery, control panels, and other electrical loads that require a 40 Amp, 3-pole breaker. It is also frequently used when replacing an existing breaker in a compatible Eaton Type BR loadcenter.