E43B080 - 80Amp Circuit Breaker

E43B080 - 80 Amp Circuit Breaker

When maintaining or repairing an existing electrical distribution system, using the correct replacement breaker matters. The E43B080 molded case circuit breaker is a 3-pole, 80-amp breaker built on the E43 frame, designed to match the form, fit, and function required for compatible legacy panelboards and switchgear. With interrupting ratings of 18kA at 480VAC and 25kA at 240VAC, it provides dependable circuit protection against overloads and short circuits in three-phase electrical systems. This breaker is HACR rated and calibrated for 40°C operation, making it suitable for systems that support heating, air conditioning, and refrigeration equipment. The bolt-on mounting design provides a secure connection inside compatible panels, while included load-side terminals help streamline installation. Molded case circuit breakers like the E43B080 are built to last and remain an important part of maintaining electrical systems that rely on E43 frame components.

Key Features and Benefits

• 80 Amp Rating – Designed for circuits that require dependable 80A overcurrent protection.
• 3-Pole Configuration – Suitable for three-phase electrical systems used in commercial and industrial environments.
• Bolt-On Mounting – Secures directly to compatible panelboards for stable installation.
• Interrupting Capacity – Rated 18kA at 480VAC and 25kA at 240VAC to safely interrupt fault currents.
• E43 Frame Compatibility – Matches the physical and electrical characteristics required for E43 frame equipment.
• HACR Rated – Appropriate for heating, air conditioning, and refrigeration applications.
• 40°C Calibration – Designed for operation in environments with higher ambient temperatures.
• Load-Side Terminals Included – Helps simplify wiring during installation.
• Molded Case Construction – Built for long-term use in electrical distribution systems.

Technical Specifications

• Part Number: E43B080
  
• Breaker Type: Molded Case Circuit Breaker
  
• Frame Type: E43
  
• Amperage Rating: 80 Amps
  
• Number of Poles: 3
  
• Voltage Rating: Up to 480 VAC
  
• Interrupting Rating (A.I.C.):
  • 18kA @ 480VAC
  • 25kA @ 240VAC
• Mounting Type: Bolt-On
  
• Temperature Rating: 40°C
  
• HACR Rated: Yes
  
• Terminals: Load-side terminals included
  
• Approximate Shipping Weight: 3.0 lbs
  
• Height: 6.35 in.
  

Material Compliance and Certifications

• Industry Standards: The E43B080 molded case circuit breaker is produced to align with commonly recognized industry safety standards for low-voltage circuit protection equipment.
• UL and CSA Electrical Safety Requirements: Breakers in this class are typically manufactured to meet UL and CSA electrical safety requirements, supporting proper use in rated electrical systems when installed according to applicable codes and manufacturer guidelines.

Where It Works Best

• The E43B080 is commonly used in commercial and industrial electrical distribution systems where compatible E43 frame panelboards or switchboards are already installed. Typical applications include:
  • Existing three-phase panelboards requiring an 80-amp breaker
  • HVAC and refrigeration systems that require HACR-rated protection
  • Commercial buildings, industrial facilities, and service equipment
  • Maintenance or replacement in legacy electrical systems that use E43 frame breakers