Eaton JGX4125AAG Complete Series G MCCB - UL Listed
Part Number: JGX4125AAG
Quick Summary
Eaton JGX4125AAG molded case circuit breaker protects electrical feeders in industrial panels. Engineers and maintenance teams rely on reliable, properly coordinated protection to minimize downtime and equipment damage. This unit features adjustable thermal and adjustable magnetic trip, a four-pole design, and a 125 A rating for versatile control of heavy loads. It is designed for 600 Vac systems with high interrupt ratings, helping meet short-circuit requirements while enabling precise protection coordination. The device is UL Listed, IEC Rated, and CSA Certified, supporting global compliance and ease of procurement. For motor control centers and power distribution in manufacturing environments, it delivers robust protection with serviceability and long-term reliability.
Product Information
Extended Description
JGX4125AAG Eaton: Eaton Series G molded case circuit breaker, JG-frame, JG, adj. 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, 0% protected neutral pole
Product Name
Eaton Series G complete molded case circuit breaker
Catalog Number
JGX4125AAG
UPC
786685127552
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
IEC Rated CSA Certified UL Listed
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
200 kAIC at 240 Vac 200 kAIC at 480 Vac 50 kAIC at 600 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
Eaton Specification Sheet - JGX4125AAG
Eaton Specification Sheet - JGX4125AAG
Eaton Specification Sheet - JGX4125AAG
Adjustable thermal and adjustable magnetic trip: This feature lets you tailor protection to motor inrush and process faults, reducing nuisance trips and extending equipment life. Business impact: improved uptime and safer startups. Application: motor feeders and critical loads in packaging, metals, and automation lines. Four-pole design with line/load terminals: Ensures balanced protection for three-phase systems with a neutral, simplifying wiring and increasing safety. Business impact: easier panel design and fewer miswirings. Application: control panels and switchgear. High interrupt ratings: 200 kAIC at 240/480 Vac and 50 kAIC at 600 Vac enable robust fault current handling, improving selective coordination and protecting equipment during short circuits. Application: heavy-duty motor drives and critical power buses. Series G, JG frame compatibility: Complete breaker design aligns with Eaton's accessory ecosystem, reducing spare parts and simplifying upgrades. Business impact: faster replacements and lower inventory. Application: retrofits in modernizing facilities. 50/60 Hz compatibility and metric mounting: ensures global installation flexibility and straightforward mounting into existing MCCB infrastructures. Compliance driven: CE Marked; IEC Rated; CSA Certified, with zero-protected-neutral-pole configurations to fit select control schemes.
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FAQs
Ensure mounting hardware is compatible with the metric footprint and panel enclosure. Mount the four-pole unit using appropriate lugs, connect line and load terminals per the JG frame guidance, verify voltage and current ratings match the system, torque connections to spec, and install any required accessories for proper neutral handling and protection coordination.
The JGX4125AAG is rated for 125 A and 600 Vac, with interrupt ratings of 200 kAIC at 240 Vac and 480 Vac, and 50 kAIC at 600 Vac. It features adjustable thermal and magnetic trip for precise coordination, supporting reliable protection for high-inrush loads and demanding drives in 50/60 Hz environments.
Yes. The JGX4125AAG carries UL Listed status and IEC rated certification, along with CSA certification, enabling global compliance and easier procurement across regional markets and panel assemblies.
Yes. With a four-pole design, adjustable thermal/magnetic trip, and high interrupt ratings, the JGX4125AAG is well-suited for motor protection, providing reliable protection coordination in motor control centers and associated control panels.
The MCCB reduces downtime through precise protection and fewer nuisance trips, supports faster maintenance with modular Eaton components, and lowers spare-parts inventory due to standard Series G compatibility. Coupled with a one-year minimum Eaton warranty, it improves total cost of ownership for industrial power systems.