E43B045 - 45Amp Circuit Breaker

E43B045 - 45Amp Circuit Breaker

The E43B045 45 Amp 3-Pole Molded Case Circuit Breaker is designed to provide dependable circuit protection in commercial and industrial electrical systems that require a compatible Type E43 breaker. Whether you're replacing an existing unit during routine maintenance or restoring equipment to service, finding the correct breaker is critical—and this model delivers the proper form, fit, and function for applications that call for a 45-amp, 3-pole configuration.

Built with a secure bolt-on design, the E43B045 helps maintain a solid connection within compatible panelboards and distribution equipment. Its molded case construction is built to last and withstand the demands of everyday operation in facilities where reliable electrical protection is essential. Rated at 18kA at 480VAC and 25kA at 240VAC, this breaker is designed to interrupt fault conditions while helping protect connected equipment and circuits from overloads and short circuits.

From manufacturing facilities and warehouses to commercial buildings and HVAC installations, the E43B045 remains a practical solution for maintaining existing electrical infrastructure. When compatibility, proper ratings, and dependable circuit protection matter, this molded case circuit breaker provides the specifications needed to support the continued operation of your electrical system.

Key Features and Benefits

• 45 Amp current rating for compatible electrical distribution applications
• 3-pole design for three-phase electrical systems
• Type E43 molded case circuit breaker
• Bolt-on mounting configuration for secure installation
• HACR rated for qualifying HVAC and refrigeration equipment
• Includes load-side terminals
• Helps protect circuits from overloads and short-circuit conditions
• Suitable for operation in ambient temperatures up to 40°C
• Form, fit, and functional replacement for equipment requiring a Type E43 breaker
• Molded case construction built to last in commercial and industrial environments
• Designed for maintenance, repair, and replacement of compatible electrical systems

Technical Specifications

• Part Number: E43B045
  
• Type: E43
  
• Circuit Breaker Type: Molded Case Circuit Breaker
  
• Mounting Style: Bolt-On
  
• Amperage Rating: 45 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 installation in compatible electrical distribution equipment
• Intended for use in accordance with applicable electrical codes and manufacturer specifications
• Suitable for systems operating within published voltage and interrupting capacity ratings

Where It Works Best

The E43B045 is commonly used in facilities that rely on existing electrical distribution systems and require a compatible Type E43 circuit breaker replacement. Typical applications include:

• Commercial buildings
• Industrial facilities
• Manufacturing plants
• HVAC systems and control equipment
• Refrigeration equipment
• Warehouses and distribution centers
• Schools and institutional facilities
• Electrical distribution panels
• Maintenance and repair projects involving compatible legacy equipment

For electricians, contractors, and maintenance professionals, the E43B045 provides the proper amperage, pole configuration, and mounting style needed to maintain compatible electrical systems while helping ensure reliable circuit protection.