Eaton QCR1040 - 40 A, 120 V, 1-Pole Circuit Breaker | AmpState

Meet the Eaton QCR1040, a compact 40A, 120V, 1-pole molded-case circuit breaker designed to safeguard branch circuits in panelboards and load centers. Built for reliable, repeatable protection, this breaker fits tight panel layouts without compromising safety or performance.

Why the QCR1040 stands out

• Space-efficient design: Molded-case construction minimizes footprint, helping you maximize panel capacity in residential, commercial, and light industrial installations.
• Thermal-magnetic protection: A combined thermal and magnetic trip unit delivers stable, predictable response to overloads and short circuits across varying temperatures, reducing nuisance trips and protecting both wiring and connected devices.
• OEM compatibility: Specifically engineered to pair with matching Eaton OEM load centers and panelboards, ensuring proper fit, labeling, and warranty alignment.
• Versatile 1-pole, 40A, 120V configuration: Ideal for protecting single hot circuits in 120V systems that require up to 40A of protection, such as high-demand lighting, outlets, or dedicated equipment circuits.

Ideal use cases

• Residential panelboards where space is at a premium but reliable branch-circuit protection is essential.
• Commercial and light industrial panels serving lighting, receptacles, or small equipment loads at 120V.
• Retrofit or replacement scenarios where OEM compatibility and a like-for-like form factor simplify installation and maintain system integrity.

How it protects your system

The QCR1040 provides both overload and short-circuit protection for dedicated 120V circuits. By interrupting fault current quickly and reliably, it helps prevent wiring damage and fire hazards, while maintaining steady electrical performance for sensitive loads.

Technical snapshot

• Manufacturer: Eaton
• Part number: QCR1040
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 40A
• Voltage rating: 120V
• Number of poles: 1
• Application: Branch circuit overcurrent and short-circuit protection

Choose the Eaton QCR1040 for dependable, panel-friendly protection that aligns with your existing load centers and panelboards. It’s a practical, purpose-built solution for keeping 120V circuits safe, compliant, and ready to perform when you need them most.