Eaton CL140 Circuit Breaker - UL 489 Classified
Part Number: CL140
Quick Summary
The Eaton CL140 circuit breaker provides thermal-magnetic protection for CH load centers in 120/240 V panels. When replacing aging breakers, compatibility and space constraints often stall commissioning; CL140 is designed as a direct classified replacement. UL 489 certification ensures safety and performance, and the 40 A rating with a 10 kAIC interrupt capability supports typical commercial and light industrial protection schemes. Its 1-Inch space requirement and compatibility with CH load centers streamline installation, reduce panel downtime, and simplify stocking for maintenance teams. This model also aligns with Eaton's catalog notes for cross-brand substitutions, delivering predictable, code-compliant protection across environments.
Product Information
Extended Description
CL140 Eaton: Eaton Classified 1" thermal magnetic circuit breaker, Type CL 1-Inch classified replacement breaker, 40 A, 10 kAIC, single-pole, 120/240V, CL, #14-4 AWG Cu/Al, CL, Type CH loadcenters
Product Name
Eaton Classified 1" thermal magnetic circuit breaker
Catalog Number
CL140
UPC
786676011594
Product Length/Depth
3 in
Product Height
3 in
Product Width
1 in
Product Weight
0.3 lb
Warranty
Limited lifetime residential, 1 year commercial
Certifications
UL 489
Catalog Notes
Replacement for Square D Homeline, GE Type THQ, Crouse-Hinds Type MP, Thomas and Betts Type TB, Murray Type MP, ITE/Siemens Type QP. Requires 1-inch (25.4 mm) space.
Used with
Type CH Loadcenters
Type
Type CL 1-Inch classified replacement breaker
Amperage Rating
40 A
Voltage rating
120/240 V
Circuit breaker type
CH
Interrupt rating
10 kAIC
Main circuit breaker
CL
Wire size
#14-4 AWG Cu/Al
Number of poles
Single-pole
Standard circuit breaker catalog numbers - 5651B63SH09
Residential and Light Commercial, Load centers and Circuit Breakers, Volume 1 Tab 1
Eaton Specification Sheet - CL140
Feature → Business Impact → Application: The CL140 is a 1-Inch classified replacement breaker designed to slot into Type CH load centers, enabling fast, plug-and-play upgrades that minimize downtime in both new construction and retrofit projects. This translates to reduced on-site labor and faster commissioning in residential and light commercial panels. Application: Ideal for contractors and maintenance teams seeking reliable cross-brand compatibility without reworking panel spaces. Feature → Business Impact → Application: 40 A amperage rating provides precise overload protection for branch circuits, reducing nuisance trips and protecting sensitive equipment in commercial spaces. Application: Suitable for lighting, outlets, and small motor loads within CH load centers in offices or retail environments. Feature → Business Impact → Application: 10 kAIC interrupt rating delivers robust fault current handling, improving safety margins in higher short-circuit environments and meeting utility coordination requirements. Application: Useful in service entrances and distribution panels with elevated fault currents. Feature → Business Impact → Application: 120/240 V operation supports standard US electrical systems while maintaining compatibility with Cu/Al wiring up to #14-4 AWG. Application: Residential, light commercial, and small industrial installations. Feature → Business Impact → Application: Catalog cross-reference and 1-Inch space requirement simplify stocking and installation planning, reducing procurement time and ensuring code-compliant replacements across mixed panel environments. Application: Fleet-wide maintenance programs and multi-brand panels.
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FAQs
The CL140 is a classified 1-Inch replacement designed for Type CH load centers. It fits standard 1-Inch spaces, uses #14-4 AWG Cu/Al conductors, and supports 120/240 V operation, enabling a direct, field-ready swap without panel modifications. Always verify the panel’s listing and ensure the replacement aligns with the intended brand cross-reference noted in Eaton’s catalog notes.
Key specs include 40 A amperage, 120/240 V voltage rating, single-pole configuration, and a 10 kAIC interrupt rating. These indicate targeted protection for branch circuits in CH load centers, with strong short-circuit interruption capability for typical commercial/industrial fault currents while maintaining compatibility with Cu/Al wiring up to #14-4 AWG.
Yes. The 40 A rating and 10 kAIC interrupt rating support residential and light commercial panel applications, particularly where CH load centers are used. Its classified replacement design helps ensure reliable performance when substituting legacy breakers, reducing downtime during service or upgrades.
The CL140 carries UL 489 certification, a key requirement for low-voltage circuit breakers in the US. This certification ensures adherence to safety and performance standards, facilitating code compliance and acceptance in UL-listed panels. Always confirm compatibility with local electrical codes and panel listings before installation.
Using the CL140 can reduce downtime through quick, classified replacements and simplify stocking across multi-brand panels due to its cross-reference compatibility. In maintenance programs, this translates to lower labor costs, faster turnarounds, and improved asset uptime, delivering measurable ROI over panel maintenance cycles.