Eaton CL140CS 1-Inch Classified Circuit Breaker - UL 489
Part Number: CL140CS
Quick Summary
Eaton CL140CS is a 1-Inch classified thermal-magnetic circuit breaker designed for Type CH loadcenters. Replacing mismatched breakers during retrofits often causes downtime and compatibility headaches; this model delivers a direct, one-slot replacement. UL 489 listing ensures safety and reliability, with a 10 kAIC interrupt rating for critical protection in commercial panels. The clamshell-pack packaging and 40 A rating simplify stocking and field installation while supporting #14-4 AWG Cu/Al terminations. Engineers value this solution for CH-loadcenter compatibility, predictable performance, and streamlined procurement in industrial electrical protection programs.
Product Information
Extended Description
CL140CS Eaton: Eaton Classified 1" thermal magnetic circuit breaker, Type CL 1-Inch classified replacement breaker clamshell pack, 40 A, 10 kAIC, single-pole, 120/240V, CL, #14-4 AWG Cu/Al, Q30, CL, Type CH loadcenters
Product Name
Eaton Classified 1" thermal magnetic circuit breaker
Catalog Number
CL140CS
UPC
782116630431
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 clamshell pack
Special features
Clamshell pack
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
Quantity
30
Standard circuit breaker catalog numbers - 5651B63SH09
Residential and Light Commercial, Load centers and Circuit Breakers, Volume 1 Tab 1
Eaton Specification Sheet - CL140CS
Feature: 1-Inch classified replacement breaker fits Type CH loadcenters. Business Impact: Maximizes panel space utilization and simplifies retrofits by using a single, standardized unit for numerous legacy installations. Application: Ideal for upgrading commercial or industrial panels that require compact protection without sacrificing ampacity. Feature: 40 A amperage rating with 120/240 V operation. Business Impact: Delivers targeted protection for control circuits and lighting feeders while maintaining compatibility with standard residential and light commercial wiring. Application: Suitable for protecting circuits in CH loadcenters and related distribution panels. Feature: 10 kAIC interrupt rating. Business Impact: Enhances fault tolerance and system safety, reducing the risk of cascading failures during short circuits. Application: Critical protection in medium to large electrical installations and service panels. Feature: UL 489 certified. Business Impact: Ensures compliance with recognized safety standards, supporting regulatory acceptance and insurance coverage. Application: Suitable for building codes and commissioning in commercial facilities. Feature: Clamshell-pack packaging and replacement compatibility notes. Business Impact: Improves stocking efficiency and quick access in maintenance inventories; supports direct substitution for Square D Homeline, GE THQ, and other brands. Application: Streamlines procurement for retrofit projects and service fleets.
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FAQs
The CL140CS is a 1-Inch classified replacement breaker designed for CH Loadcenters and requires a single 1-inch space in the panel. It accepts #14-4 AWG Cu/Al conductors and operates at 120/240 V with a 40 A rating and 10 kAIC interrupt capability. Use the clamshell-pack packaging for easier stocking and operate within UL 489 guidelines for safe commissioning.
A 40 A rating provides precise protection for typical CH Loadcenter circuits, while the 10 kAIC interrupt rating ensures the breaker can safely interrupt high fault currents. Together, these specs support reliable overcurrent protection in commercial panels, help maintain electrical code compliance, and reduce the risk of equipment damage during faults.
The CL140CS is designed as a CH Loadcenter replacement but its catalog notes describe it as compatible with multiple legacy systems when space and type align. It is intended as a direct replacement in CH loadcenters and shares a clamshell-pack format that supports stock replacements for brands referenced in Eaton’s catalog notes, such as Square D Homeline and GE THQ in applicable situations.
The CL140CS carries UL 489 certification, ensuring safety and compliance with recognized standards. It is covered by a limited lifetime warranty for residential use and a 1-year warranty for commercial applications, providing ongoing protection for retrofit projects and service life in demanding environments.
The CL140CS arrives in a clamshell-pack, enabling easier stocking and quick field replacement. Its 1-Inch class and compatibility with CH Loadcenters reduce retrofit time, while the 40 A, 120/240 V, and 10 kAIC ratings minimize additional planning for fault protection. This combination delivers lower downtime, simpler spares management, and predictable maintenance costs.