E43B040 - 40Amp Circuit Breaker

E43B040 - 40 Amp Circuit Breaker

The E43B040 molded case circuit breaker is a 3-pole, 40-amp breaker designed for dependable circuit protection in commercial and industrial electrical distribution systems. Built on the E43 frame, this bolt-on breaker is engineered for proper form, fit, and function when replacing or maintaining compatible legacy equipment. With an interrupting capacity of 18kA at 480VAC and 25kA at 240VAC, it helps safeguard electrical systems from overloads and short circuits while maintaining compatibility with existing installations. The unit is HACR rated and calibrated for operation at 40°C, making it suitable for environments where heating, air conditioning, and refrigeration equipment are present. Load-side terminals are included to simplify installation and ensure proper connections in panelboards or switchboards designed for bolt-on breakers. Designed with long-lasting components and a straightforward configuration, the E43B040 supports maintenance teams and facility managers who need reliable replacement breakers for established electrical systems.

Key Features and Benefits

• 40 Amp, 3-Pole Protection: Provides dependable protection for three-phase electrical circuits.
• Bolt-On Mounting Design: Securely attaches to compatible panels and distribution equipment.
• Interrupting Capacity: Rated 18kA at 480VAC and 25kA at 240VAC to handle fault conditions within rated systems.
• E43 Frame Compatibility: Designed for proper fit and function in equipment requiring E43-frame molded case breakers.
• HACR Rated: Suitable for use with heating, air conditioning, and refrigeration systems.
• 40°C Calibration: Built to operate within standard electrical enclosure temperature conditions.
• Includes Load-Side Terminals: Helps streamline installation and wiring during maintenance or replacement work.
• Durable Construction: Built with components designed for long service life in electrical distribution applications.

Technical Specifications

• Part Number: E43B040
  
• Product Type: Molded Case Circuit Breaker
  
• Frame Type: E43
  
• Poles: 3
  
• Amperage Rating: 40 Amps
  
• Interrupting Rating:
  • 18kA @ 480VAC
  • 25kA @ 240VAC
• Mounting Type: Bolt-On
  
• Calibration Temperature: 40°C
  
• HACR Rating: Yes
  
• Included Accessories: Load-side terminals
  
• Shipping Weight: 3.0 lbs
  
• Shipping Height: 6.35 in
  

Material Compliance and Certifications

• Industry Standards: The E43B040 molded case circuit breaker is manufactured to meet applicable industry electrical standards for molded case circuit breakers used in commercial and industrial power distribution systems.
• HACR Rating: HACR rating indicates suitability for circuits serving heating, air conditioning, and refrigeration equipment when installed according to applicable electrical codes and system requirements.
  

Where It Works Best

• This circuit breaker is commonly used in commercial facilities, industrial plants, institutional buildings, and other environments with three-phase electrical distribution systems. Its bolt-on design makes it suitable for panelboards and switchboards designed for E43-frame breakers, particularly in maintenance or replacement scenarios where maintaining compatibility with existing equipment is important. The HACR rating also supports applications involving HVAC and refrigeration equipment, making it a practical choice for mechanical systems within larger electrical infrastructures.