Eaton HFD3040 - 40 A, 600 V, 3-Pole Circuit Breaker | AmpState

Meet the Eaton HFD3040 — a 40A, 600V, 3-pole molded case circuit breaker designed to shield your electrical system with precision. Built for dependable branch circuit overcurrent and short-circuit protection in panelboards and load centers, this device helps keep daily operations smooth, whether you’re wiring a home, a small business, or a light industrial setup.

Why the Eaton HFD3040 stands out

• Compact molded case design maximizes panel space, making it easier to fit multiple circuits without crowding the enclosure.
• Thermal-magnetic trip unit delivers stable, repeatable protection across varying fault currents, reducing nuisance trips while responding swiftly to short circuits.
• OEM-ready compatibility works seamlessly with matching Eaton load centers and panelboards for simpler installation and reliable coordination.
• Versatile for multiple settings ideal for residential, commercial, and light industrial applications where dependable protection matters most.

Where and how you’ll use it

The HFD3040 is purpose-built for protecting branch circuits from overloads and short circuits in panelboards and load centers. It’s especially well-suited for three-phase distribution in commercial or light industrial environments, as well as residential applications requiring robust protection for motor loads, HVAC equipment, lighting, and other critical circuits. Its 3-pole design makes it a natural fit for 3-phase systems, ensuring coordinated protection across all phases.

Technical snapshot

• Manufacturer: Eaton
• Part Number: HFD3040
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 40A
• Voltage Rating: 600V
• Number of Poles: 3
• Application: Branch circuit overcurrent and short-circuit protection

Installation and compatibility tips

Pair the HFD3040 with matching OEM Eaton load centers and panelboards to ensure optimal fit and performance. When installing, follow standard electrical practices: secure terminations with the correct torque, align with the panel’s labeling, and verify that the trip unit operates within the panel’s coordination plan. For ongoing reliability, schedule periodic inspections of connections and ensure the device remains within its rated temperature range and environmental conditions.

Why choose this for your panels

• Efficient use of space without sacrificing protection — perfect for crowded panels where every amp matters.
• Reliable, repeatable protection that adapts to real-world fault currents thanks to its thermal-magnetic design.
• Designed to integrate smoothly with Eaton’s ecosystem of panelboards and accessories, reducing installation headaches and ensuring consistent performance.

Upgrade or specify your panel with the Eaton HFD3040 to secure dependable, industry-standard protection for your critical circuits. Add it to your order today and experience streamlined protection that aligns with your electrical system’s needs.