E43B090 - 90Amp Circuit Breaker

E43B090 - 90 Amp Circuit Breaker

If you're maintaining an electrical system that uses E43 frame breakers, the E43B090 molded case circuit breaker is designed to fit right into place. With a 90-amp rating and a 3-pole configuration, it provides dependable overcurrent protection for three-phase electrical distribution systems commonly found in commercial buildings and industrial environments. When circuits experience overloads or short circuits, this breaker is built to interrupt the flow of electricity and help keep the system operating safely.

The bolt-on mounting design allows the breaker to attach securely to compatible panelboards, which is important when working with established electrical infrastructure where the correct fit matters. With an interrupting capacity of 18kA at 480VAC and 25kA at 240VAC, the E43B090 is suitable for many standard power distribution applications. It also comes with load-side terminals included, helping make installation more straightforward for electricians handling replacements or routine maintenance. Rated for 40°C operation and HACR applications, this breaker can be used in circuits serving heating, air conditioning, and refrigeration equipment where permitted. Like many molded case breakers designed for long-term electrical systems, the E43B090 is built to last and supports the continued operation of existing equipment.

Key Features and Benefits

• 90 Amp current rating: 90 Amp current rating for branch circuit protection
• 3-pole configuration: 3-pole configuration designed for three-phase electrical systems
• Bolt-on mounting: Bolt-on mounting for secure installation in compatible panelboards
• Interrupting capacity: Interrupting capacity: 18kA at 480VAC and 25kA at 240VAC
• HACR rated: HACR rated, suitable for HVAC and refrigeration circuits where allowed
• Includes load-side terminals: Includes load-side terminals to help streamline installation
• 40°C operating rating: 40°C operating rating appropriate for typical electrical room conditions
• Molded case construction: Molded case construction designed for long service life in properly maintained systems

Technical Specifications

• Part Number: E43B090
  
• Product Type: Molded Case Circuit Breaker
  
• Frame Type: E43
  
• Amperage Rating: 90 Amps
  
• Poles: 3
  
• Mounting Type: Bolt-On
  
• Interrupting Capacity: 18kA @ 480VAC; 25kA @ 240VAC
  
• Temperature Rating: 40°C
  
• HACR Rating: HACR Rated
  
• Terminals: Includes Load-Side Terminals
  
• Approximate Height: 6.35 in
  
• Ship Weight: 3.0 lbs
  

Material Compliance and Certifications

• Industry Standards: The E43B090 circuit breaker is manufactured to meet applicable industry standards for molded case circuit breakers used in commercial and industrial electrical systems.
• HACR Rating: Its HACR rating allows it to be used in circuits that supply heating, air conditioning, and refrigeration equipment where permitted by local electrical codes.
• Installation Compliance: Proper installation should always follow NEC requirements and applicable local regulations.

Where It Works Best

• Commercial building panelboards
• Industrial electrical distribution equipment
• HVAC circuits that require HACR-rated protection
• Electrical maintenance projects involving E43 frame breakers
• Replacement installations where matching frame type, amperage rating, and mounting style are required