EB3040L - 40Amp Circuit Breaker

EB3040L - 40 Amp Circuit Breaker

The EB3040L circuit breaker is a 40-amp, 3-pole thermal-magnetic breaker designed for use in legacy electrical distribution panels manufactured prior to 1989. Built on the EB frame platform, this breaker provides dependable overcurrent protection for commercial and industrial branch circuits operating at up to 240VAC with a 10kA interrupting capacity. Its thermal-magnetic trip mechanism responds to both sustained overloads and short-circuit conditions, helping protect conductors and connected equipment from electrical damage. The EB3040L features a non-interchangeable trip unit and includes both line and load terminals, allowing for straightforward installation when maintaining or servicing compatible panelboards. Rated for operation at 40°C, this breaker is built to last and is commonly used when replacing an existing EB-frame device where proper fit, electrical rating, and panel compatibility are essential.

Key Features and Benefits

• 40 Amp Current Rating: Designed to provide reliable overcurrent protection for branch circuits.
• 3-Pole Configuration: Suitable for three-phase electrical systems.
• Thermal-Magnetic Protection: Combines thermal overload protection with magnetic short-circuit response.
• 10kA Interrupting Capacity at 240VAC: Rated to safely interrupt fault currents up to 10,000 amps.
• EB Frame Design: Matches the form and mounting style required for compatible EB-series panelboards.
• Non-Interchangeable Trip Unit: Factory-configured trip unit helps ensure consistent protection settings.
• Line and Load Terminals Included: Supports proper conductor termination during installation.
• 40°C Rated Operation: Designed to operate within standard electrical equipment temperature conditions.
• Built for Long-Term Service: Durable construction intended for continued use in maintained electrical systems.

Technical Specifications

• Part Number: EB3040L
  
• Amperage Rating: 40 Amps
  
• Number of Poles: 3
  
• Voltage Rating: 240 VAC
  
• Interrupting Capacity: 10kA @ 240VAC
  
• Trip Type: Thermal-Magnetic
  
• Trip Unit: Non-Interchangeable
  
• Frame Type: EB
  
• Temperature Rating: 40°C
  
• Terminals: Line and load terminals included
  
• Panel Compatibility: Designed for panelboards manufactured before 1989
  
• Shipping Weight: 4.13 lbs
  
• Approximate Shipping Height: 6.0 inches
  

Material Compliance and Certifications

• Industry Standards: The EB3040L circuit breaker is manufactured to align with commonly accepted electrical industry standards for molded case circuit breakers used in commercial and industrial distribution equipment.
• Installation Compliance: Components and construction are intended for use in properly rated electrical systems and installed according to applicable electrical codes and equipment specifications. Always verify compatibility with the original panelboard and system requirements before installation.

Where It Works Best

• Maintenance and service of legacy EB-frame electrical panels
• Replacement of existing 40A, 3-pole EB series breakers
• Commercial and industrial facilities maintaining older distribution equipment
• Three-phase branch circuit protection in compatible panelboards
• Electrical systems where form, fit, and rating must match existing panel design

The EB3040L is intended as a form-fit functional replacement in compatible EB-frame panelboards, helping maintain the safe operation of electrical distribution systems originally designed for this breaker type.