Eaton JGS3125FAG Molded Case Circuit Breaker - IEC UL CSA
Part Number: JGS3125FAG
Quick Summary
The Eaton JGS3125FAG molded case circuit breaker provides reliable overcurrent protection for electrical panels and motor starters in industrial environments. In demanding control cabinets, uptime is precious, and nuisance trips or miscoordination can trigger expensive downtime and repair costs. This unit carries IEC rated, UL Listed, and CSA Certified marks, with CE labeling to meet global regulatory expectations. With a 125 A rating, 600 Vac capacity, and metric mounting hardware, it scales to a wide range of panel sizes while preserving interchangeability within the Series G family. For OEMs and integrators, it offers predictable performance, straightforward installation, and reduced total cost of ownership through robust protection and long service life. It supports line-and-load terminals and is designed for 50/60 Hz systems.
Product Information
Extended Description
JGS3125FAG Eaton: Eaton Series G molded case circuit breaker, JG-frame, JG, Fixed thermal, adjustable magnetic trip, Three-pole, 125 A, 600 Vac, 85 kAIC at 240 Vac, 35 kAIC at 480 Vac, 18 kAIC at 600 Vac, Line and load, Metric, 50/60 Hz, 80% rated
Product Name
Eaton Series G complete molded case circuit breaker
Catalog Number
JGS3125FAG
UPC
782113963327
Product Length/Depth
3.57 in
Product Height
4.13 in
Product Width
4.13 in
Product Weight
6 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
IEC Rated UL Listed CSA Certified
Type
Complete breaker
Amperage Rating
125 A
Voltage rating
600 Vac
Trip Type
T185
Circuit breaker type
JG
Circuit breaker frame type
Complete breaker
Rating
80% rated
Series
Series G
Terminals
Line and load
Frame
JG
Frequency rating
50/60 Hz
Mounting hardware
Metric
Interrupt rating
35 kAIC at 480 Vac 18 kAIC at 600 Vac 85 kAIC at 240 Vac
Number of poles
Three-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
Eaton Specification Sheet - JGS3125FAG
Eaton Specification Sheet - JGS3125FAG
Eaton Specification Sheet - JGS3125FAG
Feature → Business Impact → Application: The 125 A, 600 Vac rating combined with a three-pole JG frame provides robust protection for high-power loads while maintaining coordination with upstream and downstream devices, reducing unplanned downtime in motor-driven lines and presses. This translates to fewer trip-induced outages and faster recovery in manufacturing environments where line reliability is critical. Application: control panels in conveyors, pumps, and machine assemblies require dependable protection without nuisance trips. Feature → Business Impact → Application: The interrupt ratings of 85 kAIC at 240 Vac, 35 kAIC at 480 Vac, and 18 kAIC at 600 Vac enable safe operation in circuits with diverse fault currents, lowering equipment damage risk and simplifying system design in mixed-load facilities. Application: large machine bays and multi-motor applications. Feature → Business Impact → Application: The fixed thermal, adjustable magnetic trip (Trip Type T185) delivers precise, repeatable protection curves, enhancing selective coordination and minimizing unnecessary trips during startup surges. Application: equipment with variable load profiles. Feature → Business Impact → Application: Line and load terminals with metric mounting hardware streamline wiring and installation, reducing panel-build time and enabling easier retrofits in existing enclosures. Application: new builds and panel upgrades. Feature → Business Impact → Application: Compliance with CE, IEC, UL, and CSA certifications supports regulatory alignment and customer acceptance, reducing QA cycles and accelerating procurement for global projects. Application: regulated industries and international rollouts.
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FAQs
The JGS3125FAG uses metric mounting hardware and line-and-load terminals, which simplifies wiring and installation in metric-style enclosures. Its compact 3.57 in depth and 4.13 in width/heights fit standard MCCB slots, enabling straightforward retrofits and panel redesigns without reconfiguring adjacent components.
Key ratings include a 125 A continuous amperage rating and a 600 Vac rating. It provides selectable short-circuit protection with current interrupt ratings of 85 kAIC at 240 Vac, 35 kAIC at 480 Vac, and 18 kAIC at 600 Vac. The trip type is T185, with fixed thermal and adjustable magnetic trip for reliable coordination.
Yes. The product is specified for 50/60 Hz operation and is compatible with typical IEC/UL/CSA motor protection schemes. Its Series G JG frame supports standard motor control panels, and its 125 A rating matches medium-duty motor circuits commonly found in manufacturing equipment.
The unit is CE marked and UL Listed, with IEC Rated and CSA Certified approvals. These certifications simplify global procurement, support regulatory compliance in diverse markets, and help ensure that assemblies meet safety and performance standards required by major customers and end-users.
Expected ROI comes from reduced downtime due to reliable overcurrent protection and longer service life of protected equipment. Routine maintenance includes periodic inspection of terminals and trip settings, and leveraging the CE/UL/CSA compliant design minimizes QA and retrofit costs while supporting easier field servicing.