Eaton CH140 - 40 A, 120 V, 1-Pole Plug-In Circuit Breaker | AmpState

Eaton CH140 - 40A, 120V, 1-pole plug-in molded case circuit breaker. Engineered for dependable branch circuit overcurrent and short-circuit protection in panelboards and loadcenters, this unit is built to install quickly and perform reliably under demanding operating conditions.

Why this breaker stands out

• Fast plug-in connection for rapid installation and effortless replacement, minimizing downtime during panel servicing or upgrades.
• Thermal-magnetic trip unit delivers stable, repeatable protection by combining thermal overload sensing with magnetic short-circuit interruption for immediate response to high-current faults.
• OEM-compatible design ensures seamless compatibility with matching Eaton OEM loadcenters and panelboards, reducing compatibility concerns during retrofits or new installations.
• Versatile for multiple settings suitable for residential, commercial, and light industrial applications where reliable protection is essential.

Technical snapshot

• Manufacturer: Eaton
• Part Number: CH140
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 40A
• Voltage Rating: 120V
• Number of Poles: 1
• Mounting Style: Plug-in
• Application: Branch circuit overcurrent and short-circuit protection

Practical use cases and scenarios

• Updating or expanding residential service panels where a 40A, 120V single-pole breaker is needed for dedicated circuits like HVAC controls, water heaters, or sub-panel feeders.
• Emergency replacements in panelboards and loadcenters that require a plug-in solution with quick, secure seating on the bus bar.
• Commercial or light industrial panel upgrades where fast installation and OEM compatibility save time during compliance and safety inspections.

How this compares to alternatives

Choosing a plug-in, thermal-magnetic molded case breaker from Eaton reduces installation complexity compared with bolt-on designs, while maintaining robust protection against both overloads and short circuits. Its plug-in approach eliminates model-number guessing during replacements and aligns with OEM panels for a clean, reliable fit. For projects that demand straightforward serviceability and durable performance in 120V branch circuits, the CH140 offers a concrete, purpose-built solution.

Investment in reliability means fewer nuisance trips, quicker maintenance, and safer electrical distribution across your panelboard ecosystem. The Eaton CH140 40A, 120V, 1-pole plug-in breaker is designed to perform in real-world environments—from home garages to light commercial spaces—where consistent protection and fast serviceability matter most.