Eaton CHQ240 3/4-In Thermal Magnetic Circuit Breaker UL489
Part Number: CHQ240
Quick Summary
Eaton CHQ240 is a classified 3/4-inch thermal magnetic circuit breaker for residential and light commercial load centers. Replacing legacy devices can be error-prone; this unit matches Type CH load centers and provides common-trip, reducing downtime. UL 489 certification, a 10 kAIC interrupt rating, and ground-fault capability deliver reliable protection for 120/240 V circuits. Its 40 A rating and two-pole design support balanced protection for lighting, receptacle, and small motor circuits, while the CH compatibility streamlines stocking. Designed for procurement efficiency, the CHQ240 aligns with CH Loadcenters, supports standard wire sizes, and offers a clear catalog path for contractors and distributors.
Product Information
Extended Description
CHQ240 Eaton: 3/4" Thermal magnetic circuit breakers,Type CHQ 3/4-Inch classified replacement breaker clamshell pack,Ground fault,40 A,10 kAIC,Two-pole,120/240V,CHQ,Common breaker trip,(1) #14-8 AWG, (2) #14-10 AWG Cu/Al,Q30,CHQ,Type CH Loadcenters
Product Name
Eaton Classified 3/4" thermal magnetic circuit breaker
Catalog Number
CHQ240
UPC
782113010946
Product Length/Depth
2.5 in
Product Height
3 in
Product Width
1.5 in
Product Weight
0.6 lb
Warranty
Limited lifetime residential, 1 year commercial
Certifications
UL 489
Catalog Notes
Replacement for Square D Type QO Breakers. Requires two 3/4-inch (19.1 mm) spaces.
Used with
Type CH Loadcenters
Type
Type CHQ 3/4-Inch classified replacement breaker clamshell pack
Special features
Ground fault
Amperage Rating
40 A
Voltage rating
120/240 V
Trip Type
Common breaker trip
Circuit breaker type
CH
Interrupt rating
10 kAIC
Main circuit breaker
CHQ
Wire size
(2) #14-10 AWG Cu/Al (1) #14-8 AWG
Number of poles
Two-pole
Quantity
30
Standard circuit breaker catalog numbers - 5651B63SH09
Residential and Light Commercial, Load centers and Circuit Breakers, Volume 1 Tab 1
Eaton Specification Sheet - CHQ240
Feature: Classified 3/4-inch replacement breaker in a clamshell pack; Business Impact: Ensures quick, error-free replacements in CH Loadcenters, reducing downtime and field calls; Application: Ideal for retrofit projects in residential and light commercial panels. Feature: 40 A, 120/240 V, two-pole with common trip; Business Impact: Provides reliable, balanced protection across two hot legs, improving safety and coordination; Application: Lighting and small-motor circuits in panelboards. Feature: Ground-fault capability; Business Impact: Delivers enhanced protection against leakage currents, supporting damp environments and sensitive electronics; Application: Kitchens, bathrooms, basements, and outdoor panels. Feature: 10 kAIC interrupt rating; Business Impact: Withstands high fault currents, aiding code compliance and equipment protection; Application: Feeder and branch circuits in mixed-load panels. Feature: UL 489 certification and QO replacement catalog notes; Business Impact: Simplifies approval processes and procurement, with proven compatibility; Application: Field retrofits and new installations requiring verified standards. Feature: Wire size compatibility and CH Loadcenter compatibility; Business Impact: Streamlines installation and stocking with standard Cu/Al conductors; Application: Routine panel upgrades and service changes. Feature: Warranty and lifecycle info; Business Impact: Supports cost planning with a limited lifetime residential warranty and one-year commercial coverage; Application: Long-term ownership considerations for facilities and service providers.
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FAQs
Yes, CHQ240 is designed as a classified replacement for Type CH Loadcenters and requires two 3/4-inch spaces in the panel. It is a two-pole device with common trip, rated for 40 A at 120/240 V, making it suitable for balanced two-wire and three-wire configurations typical in CH load centers.
CHQ240 provides a 40 A amperage rating, operates at 120/240 V, and is a two-pole breaker with a common trip. It carries a 10 kAIC interrupt rating and includes ground-fault capability, suitable for residential and light commercial circuits maintaining code-compliant protection.
Catalog notes indicate CHQ240 is a replacement option for Square D Type QO breakers, but installation requires confirming footprint, space availability, and the CH load center’s compatibility. It is essential to verify the two-space requirement and common-trip behavior for proper substitution.
CHQ240 is UL 489 listed, provides a 10 kAIC interrupt rating, and includes ground-fault protection. Its classified designation ensures compatibility with CH Loadcenters and compliant operation within residential and light commercial electrical distribution panels.
The CHQ240 comes in a clamshell pack as a classified replacement and is listed for CH Loadcenters, easing stocking and field retrofits. The standard wire sizes and two-pole configuration simplify installation, while the limited lifetime residential warranty and one-year commercial warranty support lifecycle planning and total cost of ownership.