Eaton QC1040 - 40 A, 120 V, 1-Pole Circuit Breaker | AmpState

Meet the Eaton QC1040, a 40-amp, 120-volt, 1-pole molded case circuit breaker built to safeguard your branch circuits from overcurrent and short-circuit events. Engineered for dependable performance in panelboards and load centers, this unit blends a compact design with precise trip technology for reliable protection you can count on every day.

• Compact molded case design: minimizes space on the panelboard and aligns neatly with other breakers, helping you maximize usable panel area.
• Thermal-magnetic trip unit: combines heat-based overload protection with magnetic instantaneous response for stable, repeatable protection under both transient and steady-state conditions.
• OEM panel compatibility: designed to pair with matching Eaton OEM load centers and panelboards for a consistent fit and code-compliant protection.
• Versatile applications: suitable for residential, commercial, and light industrial circuits requiring reliable 40A protection at 120V.

Technical specifications

• Manufacturer: Eaton
• Part Number: QC1040
• 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

Use cases and practical scenarios

In a residential panel, the QC1040 can protect a dedicated 120V circuit feeding high-demand outlets or a small workshop. In commercial settings, use it to safeguard lighting and receptacle runs or small equipment circuits where a 40A protection level offers the right balance of safety and practicality. For light industrial environments, it provides dependable protection on branch circuits that don’t require multi-pole devices, helping you maintain safe, code-compliant electrical distribution.

Why choose the Eaton QC1040?

Beyond the basic specs, this breaker delivers a thoughtful combination of form and function. The compact footprint helps you optimize panel space, while the thermal-magnetic trip unit delivers predictable responses to overloads and short circuits. Its compatibility with Eaton’s load centers and panelboards reduces installation hassles and ensures a cohesive protection strategy across your electrical distribution. For installers and facility managers stocking Eaton components, the QC1040 provides a reliable, readily available option that aligns with standard panel configurations.

Part of AmpState's Eaton lineup, the QC1040 is a practical choice when you need robust 40A protection at 120V without sacrificing panel organization or future serviceability. Replace or upgrade existing circuits with confidence, knowing you’re using a trusted Eaton component built for steady, long-term performance.