Eaton Chq140 - 40 A, 120 V, 1-Pole Circuit Breaker | AmpState

Eaton CHQ140 is a 40A, 120V, 1-pole molded case circuit breaker designed to deliver precise, dependable protection for branch circuits in panelboards and loadcenters. Built for residential, commercial, and light industrial environments, this device combines compact form with robust performance to keep electrical systems safe and compliant.

• Space-efficient molded case design minimizes panel depth and frees up valuable panel space—ideal for retrofit installs and tight enclosures.
• Thermal-magnetic trip unit provides stable, repeatable protection against overcurrent and short circuits, reducing nuisance trips and improving circuit discrimination.
• OEM-compatible performance engineered to drop into matching Eaton OEM loadcenters and panelboards without compatibility concerns.
• 1-pole configuration protects a single hot leg circuit, suitable for lighting, receptacle, and other individual branch circuits.
• Rugged, reliable operation from a leader in electrical protection ensures long service life in demanding environments.

Technical snapshot

• Manufacturer: Eaton
• Part Number: CHQ140
• 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

This CHQ140 is ideal for homeowners upgrading panel protection, electrical contractors stocking reliable replacement breakers, and facilities managers maintaining safe, compliant electrical systems. Use cases include lighting circuits, small-appliance circuits in kitchens or workshops, and general-purpose branch circuits where space efficiency and dependable trip performance matter.

Why choose the CHQ140 for your panel

• Delivers precise current interruption exactly when you need it, preserving wiring insulation and reducing fire risk.
• Integrated design emphasizes consistent trip characteristics across temperature and load variations.
• Seamless integration with Eaton panelboards and load centers minimizes modification needs and warranty concerns.

Quick compatibility and installation notes

• Confirm your panelboard is compatible with CHQ-series, 1-pole, 120V devices to ensure proper fit and labeling.
• Match the ampere rating (40A) and pole count to the circuit you intend to protect.
• Respect manufacturer guidelines for replacement breakers and never mix different breaker families within the same panel.

Protect your circuits with confidence—the Eaton CHQ140 40A, 120V, 1-pole molded case circuit breaker combines compact design, precise thermal-magnetic protection, and OEM-ready compatibility to deliver reliable branch-circuit protection across a range of settings. Add it to your panel lineup today and experience consistent, dependable performance.