EHB3040 - 40Amp Circuit Breaker

EHB3040 - 40 Amp Circuit Breaker

If you're maintaining or repairing an older electrical panel, you already know how important it is to find the right breaker—not just something close. The EHB3040 circuit breaker is built specifically for that purpose. Designed to match legacy EHB frame panelboards manufactured prior to 1989, this 40 amp, 3-pole breaker delivers dependable thermal-magnetic protection while fitting exactly where it’s needed. No guesswork, no modifications—just a straightforward replacement that keeps your system operating as intended. With its fixed, non-interchangeable trip unit, the EHB3040 provides consistent response to overloads and short circuits. It’s rated at 14kA interrupting capacity at 480VAC, making it suitable for a wide range of commercial and industrial applications. Plus, with load terminals included, installation is more convenient—especially when time matters on the job.

Key Features and Benefits

• Made for Legacy Panels – Designed for panelboards manufactured before 1989 using the EHB frame
• Straightforward Replacement – Matches original form and fit, helping reduce installation issues
• Thermal-Magnetic Operation – Handles both overload and short circuit protection in one unit
• 3-Pole Design – Ideal for three-phase electrical systems
• 40 Amp Capacity – Supports common commercial and industrial load requirements
• 14kA @ 480VAC Interrupting Rating – Safely interrupts fault currents within its rating
• Fixed Trip Unit – Non-interchangeable design ensures stable, predictable performance
• Load Terminals Included – Helps streamline installation
• 40°C Rated – Suitable for standard operating environments

Technical Specifications

• Part Number: EHB3040
  
• Amperage: 40A
  
• Poles: 3
  
• Voltage Rating: 480VAC
  
• Interrupting Capacity: 14kA @ 480VAC
  
• Frame Type: EHB
  
• Trip Type: Thermal-Magnetic (Non-Interchangeable)
  
• Temperature Rating: 40°C
  
• Height: Approx. 6.0 inches
  
• Shipping Weight: 4.13 lbs
  
• Included: Load terminals
  

Material Compliance and Certifications

• Manufactured in accordance with applicable electrical industry standards
• Built with durable components intended for long-term use in properly maintained systems
• Designed to operate safely within its rated electrical and environmental limits

Where It Works Best

The EHB3040 is a smart choice for facility maintenance teams, electricians, and contractors working with older distribution systems. It fits seamlessly into legacy panelboards that require EHB frame breakers, making it ideal for repair, replacement, and ongoing system upkeep where compatibility matters most.