Eaton CVS3125X Molded Case Circuit Breaker - 42 kAIC CV
Part Number: CVS3125X
Quick Summary
CVS3125X Molded Case Circuit Breaker protects panels by interrupting overloads in electrical distributions. This compact, reliable protection device is designed for Eaton CV frame equipment and three-pole applications in commercial and industrial environments. Selecting the right interrupt rating and conductor sizing can be challenging, often causing nuisance trips or underprotected circuits. The CVS3125X is certified to CSA Std. C22.2 No. 5 and UL 489, delivering proven safety and regulatory compliance. With a 125 A rating and 42 kAIC interrupt capacity, it supports robust protection for load centers and switchgear. Its combination of standard wiring, limited lifetime warranty, and proven performance translates to lower lifecycle costs and easier maintenance for engineering teams and contractors.
Product Information
Extended Description
CVS3125X Eaton: Eaton Type CV Molded Case Circuit Breaker,Molded case circuit breaker,125 A,42 kAIC,Three-pole,#6 - 4/0 Al/Cu,CV,#4/0 kcmil maximum load
Product Name
Eaton CCV tenant main breaker
Catalog Number
CVS3125X
UPC
786685704234
Product Length/Depth
7.5 in
Product Height
5 in
Product Width
5 in
Product Weight
4.4 lb
Warranty
Limited lifetime
Certifications
CSA Std. C22.2 No. 5 UL 489
Type
Molded case circuit breaker
Amperage Rating
125 A
Circuit breaker frame type
CV
Terminals
#4/0 kcmil maximum load
Interrupt rating
42 kAIC
Wire size
#6-4/0 AWG Cu/Al
Number of poles
Three-pole
Residential and Light Commercial, Load centers and Circuit Breakers, Volume 1 Tab 1
Eaton Specification Sheet - CVS3125X
Feature: CV frame three-pole molded case design with a 125 A rating. Business impact: Ensures coordinated protection across all three phases with consistent trip characteristics, reducing miscoordination and unplanned downtime. Application: Fits Eaton CV frame panels and load centers, enabling straightforward retrofits and standardization in new builds. Feature: 42 kAIC interrupt rating. Business impact: Higher fault interrupt capability increases system safety and minimizes damage from short circuits, reducing downstream equipment wear. Application: Essential for motor control centers and panel boards with potential high fault currents. Feature: Wire size and terminals rated #6-4/0 AWG Cu/Al; maximum load #4/0 kcmil. Business impact: Enables direct, secure connections to large feeders, shortening termination time and improving reliability. Application: Suited for feeders in heavy-duty distribution installations. Feature: Compact dimensions 7.5 in L × 5 in W × 5 in H and weight 4.4 lb; Limited lifetime warranty. Business impact: Small footprint supports denser panel layouts and predictable service costs, while warranty reduces lifecycle risk. Application: Beneficial in space-constrained retrofit projects. Feature: Certifications CSA Std. C22.2 No. 5 and UL 489. Business impact: Regulatory alignment streamlines audits and procurement, lowering compliance overhead. Application: Widely adopted in North American electrical installations for commercial and industrial panels. Feature: Overall compatibility with CV frame assemblies and standard Eaton accessories. Business impact: Simplifies stocking and replacement, ensuring quick field service and consistent performance. Application: Ideal for panel builders seeking reliable, maintainable protection across multiple projects.
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FAQs
The CVS3125X is designed for Eaton CV frame panels and load centers, supporting three-pole configurations and Cu/Al conductors sized from #6 to 4/0 AWG. It provides consistent trip characteristics across phases, enabling straightforward installation, retrofits, and standardized protection in both new builds and upgrades.
The CVS3125X offers a 125 A amperage rating with a 42 kAIC interrupt rating, providing robust short-circuit protection for three-phase circuits. This combination supports reliable protection for motor loads, feeders, and distribution panels while maintaining coordination with other CV frame devices.
Yes. With a 42 kAIC interrupt rating and three-pole design, CVS3125X is capable of handling motor inrush and fault currents typical in industrial start-up scenarios. Proper coordination with downstream devices and correct conductor sizing ensure safe operation and minimal nuisance trips.
CVS3125X is certified to UL 489 and CSA Std. C22.2 No. 5, providing recognized safety and performance benchmarks for North American electrical installations. These certifications simplify regulatory approvals, audits, and customer procurement.
To maximize uptime, install CVS3125X in CV frame panels using the specified Cu/Al conductors (#6-4/0 AWG) and secure field terminations to reduce resistance and heating. Take advantage of Eaton-compatible accessories for consistent replacement parts, and rely on the limited lifetime warranty to reduce long-term ownership costs.