E43B100 - 100Amp Circuit Breaker

E43B100 - 100Amp Circuit Breaker

When you need a compatible replacement for an existing Type E43 circuit breaker, the E43B100 delivers the ratings and configuration required to keep your electrical system operating as intended. This 100 Amp, 3-Pole molded case circuit breaker is designed for use in three-phase power distribution systems and is commonly found in commercial, industrial, and institutional facilities where dependable circuit protection is essential.

The E43B100 features a bolt-on design that helps provide a secure connection within compatible equipment, making it a practical solution for maintenance, repair, and retrofit projects. With interrupting ratings of 18kA at 480VAC and 25kA at 240VAC, this breaker is engineered to help protect electrical circuits from overloads and short-circuit conditions when applied within its published specifications.

Rated for operation in ambient temperatures up to 40°C (104°F) and carrying a HACR rating, this breaker is suitable for qualifying HVAC and refrigeration applications as well as a wide range of electrical distribution systems. Built to last and designed for long-term service, the E43B100 remains a dependable choice for maintaining existing electrical infrastructure and supporting the continued operation of critical equipment.

Key Features and Benefits

• 100 Amp current rating
• 3-pole configuration for three-phase electrical systems
• Type E43 molded case circuit breaker
• Bolt-on mounting design
• Includes load-side terminals
• HACR rated for qualifying HVAC and refrigeration applications
• 18kA interrupting rating at 480VAC
• 25kA interrupting rating at 240VAC
• Designed for operation in ambient temperatures up to 40°C
• Suitable for form, fit, and functional replacement applications
• Compatible with electrical systems utilizing Type E43 breakers
• Helps protect circuits from overload and short-circuit conditions within published ratings
• Built to last for ongoing service and maintenance needs

Technical Specifications

• Part Number: E43B100
  
• Type: E43
  
• Circuit Breaker Type: Molded Case Circuit Breaker
  
• Mounting Style: Bolt-On
  
• Amperage Rating: 100 Amps
  
• Poles: 3
  
• A.I.C. Rating: 18kA @ 480VAC; 25kA @ 240VAC
  
• Temperature Rating: 40°C
  
• HACR Rated: Yes
  
• Included Terminals: Load-Side Terminals
  
• Width: 3.0 in.
  
• Height: 6.35 in.
  
• Depth: 3.92 in.
  
• Dimensions: 3.0"W × 6.35"H × 3.92"D
  
• Approximate Shipping Weight: 5.38 lbs.
  

Material Compliance and Certifications

• HACR Rated
• Molded case circuit breaker construction
• Designed for operation within published voltage and interrupting capacity ratings
• Intended for installation in accordance with applicable electrical codes and manufacturer requirements
• Suitable for use in compatible electrical distribution equipment and assemblies

Where It Works Best

The E43B100 100 Amp 3-Pole Circuit Breaker is commonly used in facilities that require a compatible Type E43 molded case circuit breaker for maintaining or servicing existing electrical systems.

• Typical applications include:
• Commercial office buildings
• Manufacturing facilities and industrial plants
• HVAC and refrigeration systems
• Schools, universities, and institutional buildings
• Healthcare facilities
• Warehouses and distribution centers
• Mechanical and electrical equipment rooms
• Three-phase power distribution systems
• Panelboard and switchboard installations
• Maintenance and retrofit projects requiring a compatible replacement breaker
• Existing electrical systems utilizing Type E43 circuit breakers

For electricians, contractors, maintenance professionals, and facility managers, the E43B100 provides the ratings, configuration, and compatibility needed when a 100 Amp, 3-pole, bolt-on Type E43 molded case circuit breaker is required to support the continued operation of existing electrical equipment.