E43B040L - 40Amp Circuit Breaker

E43B040L - 40Amp Circuit Breaker

Finding the right replacement circuit breaker is often about matching the exact ratings and configuration your existing system requires. The E43B040L is a 40 Amp, 3-pole molded case circuit breaker designed for applications that call for a Type E43 breaker, helping maintain compatibility with existing electrical distribution equipment while providing dependable circuit protection.

Whether you're performing routine maintenance, replacing a failed breaker, or servicing an established electrical system, the E43B040L offers the form, fit, and function needed for compatible installations. It helps protect electrical circuits from overloads and short-circuit conditions and is commonly used in commercial and industrial environments where consistent operation is important.

With interrupting ratings of 18kA at 480VAC and 25kA at 240VAC, this breaker is intended for systems operating within those specifications. Its HACR rating also makes it suitable for qualifying heating, air conditioning, and refrigeration applications. For added installation convenience, the breaker includes both line-side and load-side terminals.

Key Features and Benefits

• 40 Amp current rating for compatible electrical distribution systems
• 3-pole configuration for three-phase applications
• Type E43 molded case circuit breaker
• HACR rated for qualifying HVAC and refrigeration equipment
• Includes both line-side and load-side terminals
• Helps protect electrical circuits from overloads and short-circuit conditions
• Suitable for operation in ambient temperatures up to 40°C
• Designed for commercial and industrial power distribution applications
• Form, fit, and functional replacement for systems requiring a Type E43 breaker
• Durable molded case construction built to last
• Supports maintenance and replacement projects involving compatible equipment

Technical Specifications

• Part Number: E43B040L
  
• Type: E43
  
• Circuit Breaker Type: Molded Case Circuit Breaker
  
• Amperage Rating: 40 Amps
  
• Poles: 3
  
• A.I.C. Rating: 18kA @ 480VAC; 25kA @ 240VAC
  
• Temperature Rating: 40°C
  
• HACR Rated: Yes
  
• Included Terminals: Line-Side and Load-Side Terminals
  
• Width: 3.0 in.
  
• Height: 6.35 in.
  
• Depth: 3.92 in.
  
• Dimensions: 3.0"W × 6.35"H × 3.92"D
  
• Approximate Shipping Weight: 5.38 lbs.
  

Material Compliance and Certifications

• HACR Rated
• Designed for use in compatible electrical distribution equipment
• Intended for installation in accordance with applicable electrical codes and manufacturer requirements
• Suitable for applications operating within published electrical ratings and specifications

Where It Works Best

The E43B040L is commonly used in facilities where maintaining compatibility with existing electrical infrastructure is important. Typical applications include:

• Commercial office buildings
• Industrial facilities
• Manufacturing operations
• HVAC equipment and control systems
• Refrigeration systems
• Warehouses and distribution centers
• Educational and institutional facilities
• Electrical distribution panels
• Maintenance, repair, and replacement projects involving compatible equipment

For electricians, contractors, and facility maintenance professionals, the E43B040L provides the ratings, configuration, and compatibility needed to help keep existing electrical systems operating as intended while maintaining proper circuit protection.