E43B045L - 45Amp Circuit Breaker

E43B045L - 45 Amp Circuit Breaker

The E43B045L molded case circuit breaker is designed to provide dependable circuit protection for electrical distribution systems that require a 45-amp, 3-pole breaker within an E43 frame. Built to meet common protection requirements in commercial and industrial electrical panels, this breaker helps safeguard equipment and conductors from overloads and short circuits while maintaining compatibility with existing systems. Rated 18k A.I.C. at 480VAC and 25k A.I.C. at 240VAC, the E43B045L is suitable for installations that require consistent interrupting capacity and reliable performance in standard operating conditions up to 40°C. The unit includes line-side and load-side terminals, helping simplify installation and replacement within compatible panelboards and switchboards. Its molded case construction supports long-term use in electrical systems that rely on proven protection devices built to last.

Key Features and Benefits

• 45 Amp Current Rating – Designed to protect circuits carrying up to 45 amps in commercial and industrial distribution systems.
• 3-Pole Configuration – Provides simultaneous protection across three phases for balanced power systems.
• E43 Frame Compatibility – Fits installations designed for E43 frame molded case circuit breakers, supporting proper form, fit, and function.
• Interrupting Capacity – Rated 18k A.I.C. at 480VAC and 25k A.I.C. at 240VAC for dependable short-circuit protection.
• HACR Rated – Suitable for applications involving heating, air conditioning, and refrigeration equipment where HACR ratings are required.
• Included Line and Load Terminals – Helps streamline installation and connection during maintenance or replacement.
• Molded Case Design – Durable construction intended for long service life in electrical distribution systems.

Technical Specifications

• Part Number: E43B045L
  
• Device Type: Molded Case Circuit Breaker
  
• Poles: 3
  
• Amperage Rating: 45 Amps
  
• Frame Type: E43
  
• Interrupting Capacity:
  • 18k A.I.C. @ 480VAC
  • 25k A.I.C. @ 240VAC
• Temperature Rating: 40°C
  
• HACR Rated: Yes
  
• Terminals: Includes line-side and load-side terminals
  
• Ship Weight: 3.0 lbs
  
• Shipping Height: 6.35 in
  

Material Compliance and Certifications

• The E43B045L circuit breaker is manufactured to meet commonly accepted electrical safety and performance standards for molded case circuit breakers used in commercial and industrial applications.
• HACR certification confirms suitability for heating, air-conditioning, and refrigeration systems where this designation is required.
• Proper installation by a qualified professional helps ensure compliance with applicable electrical codes and system requirements.

Where It Works Best

• Commercial electrical panelboards and distribution panels
• Industrial power distribution equipment
• HVAC and refrigeration systems requiring HACR-rated protection
• Maintenance replacement for compatible E43 frame breaker installations
• Facilities that require consistent protection for three-phase circuits

The E43B045L provides the correct form, fit, and functional replacement for electrical systems designed around this frame and rating, helping maintain safe and consistent operation within established distribution equipment.