Eaton JGS4125AAG Molded Case Circuit Breaker - UL Listed
Part Number: JGS4125AAG
Quick Summary
Eaton JGS4125AAG molded case circuit breaker protects power distribution panels by providing adjustable thermal and magnetic trip. It addresses protection-coordination and space constraints often faced in compact control panels. This UL Listed, IEC rated, and CSA Certified device supports reliable operation across global panel builds, while its Series G design offers streamlined installation and scalable protection for growing automation needs. With 125 A at 600 Vac and metric mounting, it delivers robust performance and lower total cost of ownership for industrial applications.
Product Information
Extended Description
JGS4125AAG Eaton: Eaton Series G molded case circuit breaker, JG-frame, JG, adj. thermal, adj. magnetic trip, Four-pole, 125A, 600 Vac, 85 kAIC at 240 Vac, 35 kAIC at 480 Vac, 18 kAIC at 600 Vac, Line/load, Metric, 50/60 Hz, 0% protected neutral pole
Product Name
Eaton Series G complete molded case circuit breaker
Catalog Number
JGS4125AAG
UPC
782114889121
Product Length/Depth
3.57 in
Product Height
5.34 in
Product Width
5.34 in
Product Weight
8 lb
Warranty
Eaton Selling Policy 25-000, one (1) year from the date of installation of the Product or eighteen (18) months from the date of shipment of the Product, whichever occurs first.
Compliances
CE Marked
Certifications
UL Listed IEC Rated CSA Certified
Type
Complete breaker
Amperage Rating
125 A
Voltage rating
600 Vac
Trip Type
Adjustable thermal, adjustable magnetic
Circuit breaker type
JG
Circuit breaker frame type
Complete breaker
Protection
0% protected neutral pole
Series
Series G
Terminals
Line and load
Frame
JG
Frequency rating
50/60 Hz
Mounting hardware
Metric
Interrupt rating
85 kAIC at 240 Vac 18 kAIC at 600 Vac 35 kAIC at 480 Vac
Number of poles
Four-pole
Application of Multi-Wire Terminals for Molded Case Circuit Breakers
Application of Multi-Wire Terminals for Molded Case Circuit Breakers
High performance operating handles for Series G circuit breakers product aid
High performance operating handles for Series G circuit breakers product aid
High performance operating handles for Series G circuit breakers product aid
High performance operating handles for Series G circuit breakers product aid
High performance operating handles for Series G circuit breakers product aid
High performance operating handles for Series G circuit breakers product aid
High performance operating handles for Series G circuit breakers product aid
High performance operating handles for Series G circuit breakers product aid
High performance operating handles for Series G circuit breakers product aid
High performance operating handles for Series G circuit breakers product aid
High performance operating handles for Series G circuit breakers product aid
High performance operating handles for Series G circuit breakers product aid
Breaker service centers
Circuit Protection, Molded Case Circuit Breakers, Volume 4, Tab 2
MOEM MCCB product selection guide
MOEM MCCB product selection guide
MOEM MCCB product selection guide
Feature: Adjustable thermal and magnetic trip enables precise protection coordination, reducing nuisance outages and equipment wear. Business Impact: Improves uptime and extends motor and drive life by tailoring response to specific load profiles. Application: Ideal for motors and complex loads in manufacturing lines where protection settings must adapt to evolving processes. Feature: Four-pole design with line/load terminals supports true 3-phase protection and clean power distribution. Business Impact: Enhances system reliability and simplifies wiring in multi-pole panels, lowering commissioning time. Application: Panel boards and control panels in energy-intensive environments. Feature: Series G, JG frame with metric mounting hardware simplifies installation and field upgrades. Business Impact: Reduces install time and inventory variety, cutting labor costs and boosting project throughput. Application: New builds and retrofits in machine centers and process lines. Feature: High interrupt ratings—85 kAIC at 240 Vac, 18 kAIC at 600 Vac, 35 kAIC at 480 Vac—support robust fault-current handling. Business Impact: Improves safety margins and protects downstream equipment during short circuits. Application: Data centers, packaging lines, and heavy machinery. Feature: 125 A, 600 Vac rating with CE Marked, UL Listed, and CSA Certified compliance. Business Impact: Ensures global acceptance and easier cross-border procurement. Application: International installations and multi-region facilities. Feature: 0% protected neutral pole and four-pole construction support balanced protection and predictable coordination. Business Impact: Reduces neutral-related fault risk and simplifies diagnostics in complex panels. Application: Industrial automation racks and power distribution units.
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FAQs
The JGS4125AAG uses a four-pole configuration with line and load terminals and metric mounting hardware. It is designed for the JG frame in Series G, ensuring compatibility with metric enclosures and standard panel buses. This layout supports straightforward wiring, safer terminations, and faster installation in compact panels.
This MCCB is rated at 125 A and 600 Vac. It provides interrupt ratings of 85 kAIC at 240 Vac, 18 kAIC at 600 Vac, and 35 kAIC at 480 Vac, covering a wide range of fault-current scenarios. It supports 50/60 Hz operation and four-pole protection for balanced three-phase systems.
Yes, it is appropriate for general industrial use in manufacturing environments, offering reliable protection with adjustable trip settings and a Series G design for easy integration. While it is CE Marked, UL Listed, and CSA Certified, users should still ensure enclosure IP ratings and environmental conditions meet specific panel requirements.
The JGS4125AAG carries UL Listed, IEC Rated, and CSA Certified marks, along with CE Marking. These certifications indicate conformance to recognized safety and performance standards across North America and Europe, enabling global deployment in diverse panels, reducing qualification time for new installations, and simplifying regulatory compliance during audits.
Eaton provides a policy (25-000) offering a one-year warranty from the date of installation or eighteen months from shipment, whichever comes first. Field support includes access to Eaton service centers and regional technical resources to assist with installation, commissioning, and ongoing maintenance for the Series G MCCB family.