E43B100L - 100Amp Circuit Breaker

E43B100L - 100 Amp Circuit Breaker

The E43B100L molded case circuit breaker is designed to provide dependable circuit protection for electrical distribution systems that require a 3-pole, 100-amp breaker built on the E43 frame. In many commercial and industrial facilities, electrical systems are built around specific breaker frames, and maintaining those systems means installing components that match the original specifications. The E43B100L is built for that purpose—delivering the proper form, fit, and function for compatible panelboards and switchgear. With an interrupting rating of 18kA at 480VAC and 25kA at 240VAC, it helps protect circuits by interrupting overcurrent and short-circuit conditions before damage can spread through the system.

This molded case breaker is HACR rated, making it suitable for circuits connected to heating, air conditioning, and refrigeration equipment. It’s also rated for 40°C operating environments, which are typical for many electrical rooms and mechanical spaces. The breaker includes line-side and load-side terminals, simplifying installation within compatible equipment. Like many molded case breakers designed for commercial power distribution, units built on the E43 frame were made with longevity in mind, supporting reliable operation in electrical systems that continue to serve facilities for many years.

Key Features and Benefits

• 100 Amp Rating – Designed to protect circuits that require 100A capacity.
• 3-Pole Breaker Design – Supports three-phase electrical systems commonly used in commercial and industrial environments.
• E43 Frame Compatibility – Fits equipment designed for the E43 breaker frame, helping maintain proper system configuration.
• Interrupting Capacity – Rated 18kA at 480VAC and 25kA at 240VAC to address potential fault conditions.
• HACR Rated – Suitable for circuits serving heating, air conditioning, and refrigeration systems.
• Line and Load Terminals Included – Terminals are provided for connection during installation.
• Molded Case Construction – Built for long-term use in electrical distribution systems.
  

Technical Specifications

• Part Number: E43B100L
  
• Breaker Type: Molded Case Circuit Breaker
  
• Frame Type: E43
  
• Poles: 3
  
• Amperage Rating: 100 Amps
  
• Interrupting Rating:
  • 18kA @ 480VAC
  • 25kA @ 240VAC
• Temperature Rating: 40°C
  
• HACR Rated: Yes
  
• Terminals: Line and load-side terminals included
  
• Ship Weight: 3.0 lbs
  
• Height: 6.35 inches
  

Material Compliance and Certifications

• UL Safety Requirements: Molded case circuit breakers like the E43B100L are produced to meet recognized North American electrical safety standards, including compliance with applicable UL safety requirements for circuit protection devices.
• Safe Installation: These standards help ensure the breaker operates safely when installed in compatible electrical distribution equipment and according to applicable electrical codes.
  

Where It Works Best

• The E43B100L is commonly used in commercial buildings, industrial facilities, schools, hospitals, and large mechanical systems where electrical infrastructure was designed around the E43 breaker frame. It’s particularly useful when maintaining or servicing existing panelboards, switchgear, or distribution panels that require a 3-pole, 100-amp breaker with matching interrupting ratings. Because it is HACR rated, it also works well on circuits that supply HVAC units, chillers, and refrigeration equipment, along with other three-phase electrical loads operating within the breaker’s rated capacity.