Eaton QB2040EP - 40 A, 240 V, 2-Pole Bolt-On Circuit Breaker | AmpState

Meet the Eaton QB2040EP, a 40-amp, 240-volt, 2-pole bolt-on molded case circuit breaker designed to protect your electrical system with precision. Built for dependable branch circuit overcurrent and short-circuit protection, it’s engineered to integrate seamlessly into panelboards and load centers, delivering reliable performance across residential, commercial, and light industrial settings.

Why the QB2040EP stands out

• Secure bolt-on mounting provides a rigid, vibration-resistant bus connection, helping maintain a consistent electrical path even in environments with movement or temperature fluctuations.
• Thermal-magnetic trip unit delivers stable, repeatable protection by responding accurately to both overloads and short circuits, reducing nuisance trips and ensuring safety when it matters most.
• OEM-compatible fit is designed to work with matching Eaton load centers and panelboards, ensuring an optimal, listed pairing that simplifies replacements and upgrades.
• 2-pole, 40A, 240V design protects both conductors in 240V circuits, ideal for equipment and appliances that draw balanced power across two hot lines.
• Versatile for multiple sectors—suitable for residential panels, commercial electrical rooms, and light industrial installations where dependable circuit protection is essential.

Prime use cases and practical applications

• Feeding HVAC equipment, water heaters, and large appliances in residential panelboards where 240V circuits are common.
• Protecting branch circuits in commercial electrical rooms, including lighting, receptacles, and small mechanical loads.
• Supporting light industrial panels where robust bolt-on mounting and reliable trip behavior are critical for continuous operation.

Technical snapshot

• Manufacturer: Eaton
• Part number: QB2040EP
• Type: Thermal-magnetic molded case circuit breaker
• Amperage: 40A
• Voltage: 240V
• Poles: 2
• Mounting: Bolt-on
• Typical use: Branch circuit overcurrent and short-circuit protection

Why choose Eaton QB2040EP over alternatives

This breaker blends a rugged bolt-on mounting approach with a precise thermal-magnetic trip mechanism, translating to fewer unexpected trips and more consistent protection in diverse environments. Its OEM-compatible design minimizes compatibility concerns when upgrading or expanding panel installations, while the 2-pole, 240V configuration is especially well-suited for circuits that require simultaneous protection of both hot conductors. For professionals and do-it-yourselfers alike, the QB2040EP provides a straightforward, reliable solution for achieving safe, code-compliant protection in a variety of panelboards and load centers.