Eaton Cutler-Hammer QCHW1040 40A 1P 240V Circuit Breaker | AmpState

The Eaton Cutler-Hammer QCHW1040 is a dependable, OEM-grade circuit breaker engineered to protect your electrical distribution setup with precision. At 40 A, this 1-pole device is built for 240 V circuits, making it a versatile choice for panelboards, load centers, and other distribution points where reliable overcurrent protection matters.

Why this specific QCHW1040 stands out

• Exact fit for BOM alignment: Designed to align with the original part number, helping you maintain schematic and procurement consistency during replacements or stock builds.
• Clear, purpose-driven amperage: 40 A rating provides the right protection for moderately heavy circuits without unnecessary nuisance tripping.
• One-pole convenience: Streamlined protection for single-phase 240 V circuits—ideal for residential, commercial, and light industrial applications.
• Trusted brand lineage: From Eaton Cutler-Hammer, a name associated with durable electrical protection and compatible replacement parts across distribution systems.
• Available from AmpState: Ready to ship; support is available to ensure you’re selecting the correct part for your panel.

Ideal use cases

• Replacement projects where the original part number must be preserved to keep BOMs accurate and service manuals aligned.
• Spare parts stocking for service vans and maintenance warehouses to minimize downtime when circuits trip.
• Retrofits and upgrades in panelboards or load centers that operate on 240 V single-pole 40 A circuits.
• Emergency replacements in commercial or light industrial electrical distribution setups where quick, reliable protection is essential.

How it works in real-world setups

Install the QCHW1040 in a compatible panel to protect 240 V circuits serving feeders, outlets, or equipment with a 40 A load profile. Its single-pole design simplifies replacement in appropriate slots, reducing installation time and ensuring consistent protective behavior with the rest of the distribution network.

Compatibility & support

To ensure you’re matching the right part, consider the circuit's voltage, amperage, and pole configuration. If you’re unsure about fit, AmpState offers assistance to confirm compatibility and fit. Need help matching a part number or confirming compatibility? Message us and we’ll help you confirm fit.

What you get and practical tips

• Single-pole 40 A, 240 V circuit protection built for reliable performance.
• Stocked by AmpState for quick turnaround on urgent replacements or planned maintenance.
• Keep your BOM consistent by choosing the exact QCHW1040 part number when replacing or stocking spares.

With the Eaton Cutler-Hammer QCHW1040, you’re choosing a circuit breaker engineered for dependable protection, straightforward replacement, and seamless integration into existing panelboard and load center configurations. Whether you’re maintaining a current installation or planning a parts kit for future service calls, this 40 A, 1P, 240 V breaker helps you keep electrical distribution running smoothly and safely.