EHD3040L - 40Amp Circuit Breaker

EHD3040L - 40 Amp Circuit Breaker

If you’re looking for a circuit breaker that does its job—every time, the Eaton EHD3040L is built for exactly that. This 40-amp, three-pole molded-case circuit breaker is designed to protect your electrical system from overloads and short circuits. Whether you’re managing a commercial facility or working on an industrial setup, this breaker gives you the confidence that your system is protected by proven engineering. Part of Eaton’s respected Series C family, the EHD3040L combines dependable performance with a compact design, making it an easy fit in tight panel spaces without sacrificing capability.

What makes this breaker stand out is its balance—strong interrupting power, consistent thermal-magnetic trip response, and straightforward installation. It’s the kind of component electricians trust because it works quietly in the background, preventing costly downtime and equipment damage. If your goal is long-term reliability and safe power distribution, this breaker earns its place in your system.

Key Features and Benefits

• Reliable 40 Amp Circuit Protection – Helps prevent overloads and short circuits before they become costly problems
• Three-Pole Design – Perfect for three-phase electrical systems in commercial and industrial environments
• Strong Interrupting Capacity – Handles up to 14 kAIC at 480V and 18 kAIC at 240V with confidence
• Thermal-Magnetic Trip Unit (T186) – Responds quickly and accurately to changing electrical conditions
• Space-Saving Footprint – Compact size makes it ideal for panelboards with limited space
• Flexible Line and Load Terminals – Simplifies installation and integration into existing systems
• Proven Series C Performance – Built on Eaton’s long-standing reputation for quality and consistency

Technical Specifications

• Catalog Number: EHD3040L
• Product Type: Molded Case Circuit Breaker
• Amperage Rating: 40 Amps
• Poles: 3
• Trip Type: T186 Thermal-Magnetic
• Voltage Rating: Up to 480 VAC
• Interrupt Rating:
  • 14 kAIC at 480 VAC
  • 18 kAIC at 240 VAC
• Frequency: 50/60 Hz
• Frame Type: F Frame (Complete Breaker)
• Dimensions:
  • 5 in (H)
  • 4.13 in (W)
  • 3.38 in (D)
• Weight: 4.5 lbs
• Terminal Type: Line and Load

Material Compliance and Certifications

• UL Listed – Meets strict safety and performance standards for electrical protection
• Manufactured to align with industry requirements, ensuring dependable operation in demanding environments

Where It Works Best

The Eaton EHD3040L fits naturally into commercial buildings, industrial facilities, and OEM equipment that use three-phase power as standard. It’s especially effective in panelboards, distribution systems, and machinery protection applications where consistent performance is non-negotiable. If downtime isn’t an option and safety is a priority, this breaker is exactly where you want to be.