Eaton JGX4125FAG Molded Case Circuit Breaker - UL Listed
Part Number: JGX4125FAG
Quick Summary
Eaton Series G complete molded case circuit breaker protects power distribution panels in industrial control cabinets. This unit helps engineers maintain reliable protection while fitting into compact control enclosures. Many projects struggle with protecting circuits without sacrificing space or complicating wiring. The JGX4125FAG carries CSA Certified, UL Listed, and IEC Rated approvals, plus CE Marked compliance for global acceptance. With a four-pole design, 125 A rating, and 600 Vac capability, it enables straightforward panel layouts and robust short-circuit protection, while the fixed thermal and adjustable magnetic trip support precise coordination. The result is improved safety, faster commissioning, and lower lifecycle costs for electrical protection in automation installations.
Product Information
Extended Description
JGX4125FAG Eaton: Eaton Series G molded case circuit breaker, JG-frame, JG, Fixed thermal, adj. magnetic trip, Four-pole, 125A, 600 Vac, 200 kAIC at 240 Vac, 200 kAIC at 480 Vac, 50 kAIC at 600 Vac, Line/load, Metric, 50/60 Hz, 80% rated
Product Name
Eaton Series G complete molded case circuit breaker
Catalog Number
JGX4125FAG
UPC
786685127125
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
CSA Certified UL Listed IEC Rated
Type
Complete breaker
Amperage Rating
125 A
Voltage rating
600 Vac
Trip Type
T185
Circuit breaker type
JG
Circuit breaker frame type
Complete breaker
Protection
0% protected neutral pole
Rating
80% rated
Series
Series G
Terminals
Line and load
Frame
JG
Frequency rating
50/60 Hz
Mounting hardware
Metric
Interrupt rating
50 kAIC at 600 Vac 200 kAIC at 240 Vac 200 kAIC at 480 Vac
Number of poles
Four-pole
Application of Tap Rules to Molded Case Breaker Terminals
Application of Tap Rules to Molded Case Breaker Terminals
Motor protection circuit breakers product aid
Motor protection circuit breakers product aid
Motor protection circuit breakers product aid
Motor protection circuit breakers product aid
Motor protection circuit breakers product aid
Motor protection circuit breakers product aid
Motor protection circuit breakers product aid
Motor protection circuit breakers product aid
Motor protection circuit breakers product aid
Motor protection circuit breakers product aid
Motor protection circuit breakers product aid
Motor protection circuit breakers product aid
Breaker service centers
Circuit Protection, Molded Case Circuit Breakers, Volume 4, Tab 2
Eaton Specification Sheet - JGX4125FAG
Eaton Specification Sheet - JGX4125FAG
Eaton Specification Sheet - JGX4125FAG
Selling Policy 25-000 - Distribution and Control Products and Services
Feature to Business Impact to Application: The JGX4125FAG uses a four-pole, 125 A rating with a 600 Vac voltage capability, delivering high fault-current protection for main feeders and control circuits, reducing downtime and equipment damage in harsh industrial environments; this translates to increased reliability and lower maintenance costs in power distribution panels. In practice, this enables more compact panel designs without sacrificing protection integrity, helping project teams meet space constraints while sustaining regulatory compliance for machinery and process lines. The fixed thermal with adjustable magnetic trip (T185) supports precise coordination, improving selectivity and minimizing nuisance trips during startup or load surges in automation cells. Its JG frame and metric mounting simplify retrofit and new panel builds, speeding installation and ensuring consistent performance across machines and conveyors. Compatibility with Series G MCCBs and standardized line/load terminals reduces part variety, lowering spares inventory and total cost of ownership.
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FAQs
The JGX4125FAG is a Series G complete molded case circuit breaker designed for line/load terminals with metric mounting. It fits standard JG frame MCCB applications in industrial control panels and machine zones, integrating with typical panel busbars and compatible accessories listed in Eaton's Series G documentation.
Install the four-pole MCCB using metric mounting hardware in the panel, connect line and load conductors to the respective terminals, and set the adjustable magnetic trip (T185) to coordinate with downstream protection. Ensure the device is CE marked and UL/CSA/IEC certified to meet regulatory requirements for industrial panels.
It provides 50 kAIC at 600 Vac and 200 kAIC at 240/480 Vac, with a voltage rating of 600 Vac and a 125 A amperage rating. This combination supports robust protection for high-energy circuits while maintaining safe operation across 50/60 Hz systems.
Yes. The unit is UL Listed, CSA Certified, and IEC Rated, with CE Marked compliance. This combination supports global acceptance and helps satisfy regulatory and safety standards for electrical protection in industrial applications.
The four-pole, 125 A, 600 Vac MCCB offers high fault-current protection with reliable coordination, reducing unplanned downtime. Its metric mounting and standardized line/load terminals simplify installation and spares management, while certifications and robust interrupt ratings minimize compliance risk and warranty concerns, delivering lower lifecycle costs for panel builders and machine integrators.