E42B045L - 45Amp Circuit Breaker

E42B045L - 45 Amp Circuit Breaker

The E42B045L molded case circuit breaker is designed to provide dependable circuit protection in electrical distribution systems that require a 45-amp, 2-pole breaker within an E42 frame. Built for use in commercial and industrial panelboards or switchgear, this breaker helps protect conductors and equipment from overloads and short circuits while maintaining compatibility with existing systems that rely on the E42 frame format. Rated 18k A.I.C. at 480VAC and 25k A.I.C. at 240VAC, the E42B045L supports applications where interrupting capacity and consistent protection are essential. This unit is HACR rated and designed for operation in environments up to 40°C, making it suitable for HVAC-related circuits as well as general power distribution. The breaker includes line and load-side terminals, simplifying installation and ensuring a proper connection within compatible assemblies. Built with the expectation of long service life, molded case breakers like the E42B045L remain a practical solution for maintaining and servicing existing electrical infrastructure.

Key Features and Benefits

• 45 Amp Current Rating – Designed to protect branch circuits requiring 45A overcurrent protection.
• Two-Pole Configuration – Provides protection across two conductors, commonly used in 240V and certain 480V applications.
• E42 Frame Compatibility – Engineered to match equipment designed for E42 frame molded case breakers.
• Interrupting Capacity – Rated 18k A.I.C. at 480VAC and 25k A.I.C. at 240VAC to handle fault conditions within these limits.
• HACR Rated – Suitable for use with heating, air conditioning, and refrigeration equipment circuits.
• Includes Line and Load Terminals – Supplied with connection terminals to support straightforward installation.
• 40°C Operating Environment – Designed for use in electrical systems operating at standard ambient temperature ratings.
• Molded Case Construction – A durable housing designed to support long-term electrical protection.

Technical Specifications

• Part Number: E42B045L
  
• Product Type: Molded Case Circuit Breaker
  
• Frame Type: E42
  
• Amperage Rating: 45 Amps
  
• Poles: 2
  
• Interrupting Rating:
  • 18k A.I.C. @ 480VAC
  • 25k A.I.C. @ 240VAC
• Temperature Rating: 40°C
  
• HACR Rated: Yes
  
• Terminals: Line and load-side terminals included
  
• Ship Weight: 2.0 lbs
  
• Dimensions (Height): 6.35 in
  

Material Compliance and Certifications

• Industry Standards: The E42B045L molded case circuit breaker is manufactured for use in electrical distribution systems where equipment must meet applicable industry safety standards and ratings for molded case circuit breakers.
• UL and NEMA Expectations: Units of this type are commonly produced in accordance with UL and NEMA performance expectations for circuit protection devices used in commercial and industrial installations.
• Installation Guidance: Proper installation and application should follow local electrical codes and manufacturer guidelines.
  

Where It Works Best

• Commercial building electrical panels
• Industrial control panels and distribution equipment
• HVAC systems requiring HACR-rated protection
• Maintenance or replacement within legacy panelboards and switchgear
• Electrical infrastructure where a 45-amp, 2-pole molded case breaker with the specified interrupting ratings is required