E42B045 - 45Amp Circuit Breaker

E42B045 - 45 Amp Circuit Breaker

The E42B045 molded case circuit breaker is a 45-amp, 2-pole bolt-on breaker designed for dependable protection of electrical distribution systems operating at up to 480VAC. Built within the E42 frame, this breaker is intended to provide form, fit, and functional replacement in compatible panelboards and distribution equipment where the same ratings and mounting configuration are required. With an interrupting capacity of 18kA at 480VAC and 25kA at 240VAC, the E42B045 helps protect circuits from overloads and short circuits while maintaining compliance with standard electrical protection requirements. Its bolt-on mounting design provides secure installation in equipment designed for this style of connection, while included load-side terminals simplify wiring during replacement or maintenance. Rated for 40°C operation and HACR applications, this molded case circuit breaker is commonly used in commercial and industrial electrical systems where dependable circuit protection and compatibility with existing equipment are important. Like many molded case breakers built for long service life, the E42B045 is constructed with durability in mind for ongoing use in legacy electrical infrastructure.

Key Features and Benefits

• 45 Amp Protection: Designed to protect branch circuits from overloads and short circuits in compatible systems.
• 2-Pole Configuration: Supports two connected circuits or a 240V circuit in applicable electrical panels.
• Bolt-On Mounting: Provides a secure mechanical and electrical connection in panelboards designed for bolt-on breakers.
• E42 Frame Type: Ensures proper fit and compatibility with equipment designed for this frame series.
• HACR Rated: Suitable for heating, air conditioning, and refrigeration equipment circuits where HACR ratings are required.
• Load-Side Terminals Included: Helps streamline installation and wiring during replacement or servicing.
• Designed for Long-Term Use: Molded case breakers of this type are built for extended service in electrical distribution systems.

Technical Specifications

• Part Number: E42B045
  
• Breaker Type: Molded Case Circuit Breaker
  
• Frame Type: E42
  
• Poles: 2
  
• Current Rating: 45 Amperes
  
• Interrupting Rating:
  • 18kA @ 480VAC
  • 25kA @ 240VAC
• Mounting Type: Bolt-On
  
• Temperature Rating: 40°C
  
• HACR Rated: Yes
  
• Terminals: Includes Load-Side Terminals
  
• Ship Weight: 2.0 lbs
  
• Approximate Height: 6.35 inches
  

Material Compliance and Certifications

• Industry Standards: The E42B045 circuit breaker is manufactured to meet applicable electrical industry standards for molded case circuit breakers used in commercial and industrial power distribution systems.
• HACR Certification: HACR certification indicates suitability for circuits associated with heating, air conditioning, and refrigeration equipment.
• Compliance: Compliance with recognized electrical ratings ensures the breaker can be used where interrupting capacity and voltage specifications match system requirements.

Where It Works Best

• The E42B045 45A bolt-on circuit breaker is commonly installed in commercial and industrial panelboards, electrical distribution equipment, and facilities operating with 480V or 240V power systems that require a breaker matching the E42 frame and bolt-on mounting configuration.
• Commercial buildings and facilities
• Industrial electrical distribution panels
• HVAC and refrigeration circuit protection (HACR applications)
• Maintenance replacement in existing panelboards using E42 frame breakers
• Electrical systems requiring a 45-amp, 2-pole breaker with specified interrupting ratings