E43B040 - 40Amp Circuit Breaker

E43B040 - 40Amp Circuit Breaker

When you need a Type E43 circuit breaker to keep an existing electrical system operating as intended, the E43B040 provides the ratings and configuration required for a proper fit within compatible equipment. This 40 Amp, 3-pole molded case circuit breaker is designed to help protect electrical circuits from overloads and short-circuit conditions while supporting the continued operation of commercial and industrial power distribution systems.

Featuring a bolt-on design, the E43B040 installs in applications that require a Type E43 breaker and includes load-side terminals for added convenience during installation. Its HACR rating makes it suitable for qualifying heating, air conditioning, and refrigeration equipment, while its interrupting ratings of 18kA at 480VAC and 25kA at 240VAC allow it to be used in systems operating within those specifications.

Electrical systems are often built around specific breaker types and ratings, making compatibility an important consideration during maintenance and replacement projects. The E43B040 delivers the form, fit, and function needed for compatible installations without requiring changes to the existing system design. Built with a durable molded case construction and designed for operation in environments up to 40°C, this breaker is made to provide dependable circuit protection in facilities where reliability matters every day.

Key Features and Benefits

• 40 Amp current rating for compatible electrical distribution systems
• 3-pole configuration for three-phase power applications
• Type E43 molded case circuit breaker
• Bolt-on mounting design for compatible installations
• HACR rated for qualifying HVAC and refrigeration equipment
• Includes load-side terminals
• Helps protect circuits and connected equipment from overloads and short circuits
• Suitable for operation in ambient temperatures up to 40°C
• Compact design helps simplify installation in compatible equipment
• Form, fit, and functional replacement for systems requiring a Type E43 breaker
• Durable molded case construction built to last

Technical Specifications

• Part Number: E43B040
  
• Type: E43
  
• Circuit Breaker Type: Molded Case Circuit Breaker
  
• Mounting Style: Bolt-On
  
• Amperage Rating: 40 Amps
  
• Poles: 3
  
• A.I.C. Rating: 18kA @ 480VAC; 25kA @ 240VAC
  
• Temperature Rating: 40°C
  
• HACR Rated: Yes
  
• Included Terminals: 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 E43B040 is commonly found in facilities where maintaining existing electrical infrastructure is a priority. Typical applications include:

• Commercial buildings
• Industrial facilities
• Manufacturing plants
• HVAC systems
• Refrigeration equipment
• Warehouses and distribution centers
• Schools and institutional facilities
• Power distribution panels
• Maintenance, repair, and replacement projects involving compatible equipment

For electrical professionals and facility maintenance teams, the E43B040 offers the ratings, configuration, and compatibility needed to help keep existing systems operating safely and efficiently.