EB3040 - 40Amp Circuit Breaker

EB3040 - 40 Amp Circuit Breaker

The EB3040 circuit breaker is a 40-amp, 3-pole thermal-magnetic circuit breaker designed for use in electrical distribution systems requiring dependable overcurrent protection in legacy panel configurations. Built on the EB frame platform, this breaker features a non-interchangeable trip unit that provides consistent protection against overloads and short circuits. With an interrupting capacity of 10kA at 240VAC, the EB3040 is engineered to match the electrical and physical requirements of panelboards manufactured prior to 1989. Its thermal-magnetic design combines two protective functions in a single device: thermal protection for prolonged overcurrent conditions and magnetic tripping for instantaneous response to short circuits. Rated for 40°C operating environments, the breaker supports typical electrical room and industrial panel conditions. The unit includes load terminals, simplifying installation when replacing an existing breaker of the same form and fit. Built with durable internal components and a proven design that has been used in commercial and industrial systems for decades, the EB3040 offers dependable service when maintaining or repairing compatible legacy electrical equipment.

Key Features and Benefits

• 40 Amp Current Rating – Designed to provide reliable overcurrent protection for branch circuits and distribution applications.
• 3-Pole Configuration – Supports three-phase electrical systems commonly found in commercial and industrial facilities.
• Thermal-Magnetic Protection – Dual-mechanism design helps respond to both sustained overloads and instantaneous short circuits.
• 10kA Interrupting Capacity at 240VAC – Rated to safely interrupt fault currents within the specified electrical system limits.
• EB Frame Construction – Maintains correct form and fit for panelboards designed for EB-series breakers.
• Non-Interchangeable Trip Unit – Fixed trip configuration ensures consistent protection characteristics.
• Includes Load Terminals – Helps simplify wiring connections during installation or replacement.
• Designed for Pre-1989 Panels – Suitable for maintaining compatibility with electrical systems installed in earlier panelboard designs.
• 40°C Temperature Rating – Intended for operation in standard electrical equipment environments.

Technical Specifications

• Part Number: EB3040
  
• Amperage Rating: 40 Amps
  
• Poles: 3
  
• Frame Type: EB
  
• Trip Type: Thermal-Magnetic, Non-Interchangeable Trip Unit
  
• Interrupting Capacity: 10kA
  
• Voltage Rating: 240VAC
  
• Operating Temperature Rating: 40°C
  
• Included Terminals: Load Terminals Included
  
• Approximate Shipping Weight: 4.13 lbs
  
• Approximate Shipping Height: 6.0 in
  
• Intended Panel Compatibility: Panelboards manufactured prior to 1989
  

Material Compliance and Certifications

• Industry Standards: The EB3040 circuit breaker is manufactured using industry-standard electrical components and materials typically required for molded-case circuit breakers used in commercial and industrial distribution equipment.
• Electrical System Compatibility: These breakers are produced to align with common electrical safety and performance standards applicable to molded-case circuit breakers used in North American electrical systems.

Where It Works Best

• The EB3040 breaker is intended for maintenance, repair, and replacement applications in legacy electrical distribution systems where EB-frame breakers are specified. Typical environments include: Commercial buildings with original panelboards installed before 1989, Industrial facilities maintaining existing electrical distribution equipment, Service upgrades where maintaining the original panel configuration is required, Electrical maintenance projects requiring a breaker with matching form, fit, and ratings. Because compatibility is critical in electrical systems, the EB3040 is best used where the existing panelboard and circuit design call for an EB-frame 3-pole 40-amp breaker with a 10kA interrupting rating at 240VAC.