Eaton JGU4125AAG Molded Case Circuit Breaker - UL Listed
Part Number: JGU4125AAG
Quick Summary
Molded Case Circuit Breaker JGU4125AAG by Eaton delivers reliable overcurrent protection for power distribution panels and control circuits. Engineers often face nuisance trips and coordination challenges in complex panel builds, which degrade uptime and complicate maintenance. This device is UL Listed, CSA Certified, and IEC rated, supporting global compliance. With a 125 A rating and 600 Vac capability in a four-pole JG frame, it enables precise protection while aligning with metric mounting and standardized line/load terminations for streamlined installation and service in industrial environments.
Product Information
Extended Description
JGU4125AAG 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, 150 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
JGU4125AAG
UPC
786685127385
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 IEC Rated 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
Rating
80% rated
Series
Series G
Terminals
Line and load
Frame
JG
Frequency rating
50/60 Hz
Mounting hardware
Metric
Interrupt rating
150 kAIC at 480 Vac 50 kAIC at 600 Vac 200 kAIC at 240 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 - JGU4125AAG
Eaton Specification Sheet - JGU4125AAG
Eaton Specification Sheet - JGU4125AAG
Feature: JG frame complete breaker with adjustable thermal and magnetic trip. Business Impact: Enables precise protection curves and selective coordination, reducing nuisance trips and stockouts. Application: Ideal for panelboards and control enclosures in 50/60 Hz systems. Feature: Amperage rating of 125 A and voltage rating of 600 Vac. Business Impact: Matches common industrial feeders and main distribution paths, enhancing reliability and wiring efficiency. Application: Industrial and commercial power distribution sites seeking robust feeders and fault protection. Feature: High interrupt ratings—200 kAIC at 240 Vac, 150 kAIC at 480 Vac, 50 kAIC at 600 Vac. Business Impact: Withstands high fault currents, improving system resilience and reducing equipment damage risk. Application: Medium- and high-headroom electrical rooms and switchgear interfaces. Feature: Certifications and compliance—CE Marked, CSA Certified, UL Listed. Business Impact: Simplifies procurement for global projects and ensures regulatory alignment with country-specific safety standards. Application: OEMs and integrators targeting multi-region deployments. Feature: Terminals for line and load with metric mounting hardware. Business Impact: Facilitates fast, secure installation and easier field upgrades. Application: Standardized panel builds and retrofit projects across OEMs and maintenance teams.
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FAQs
The JGU4125AAG uses metric mounting hardware and line/load terminals designed for quick, secure panel integration. Verify panel space for a four-pole configuration, align with the JG frame dimensions, and tighten mounting screws to OEM torque specs. Ensure proper clearance for heat dissipation and verify compatible accessories per Eaton’s Series G documentation.
Key specs include a 125 A amperage rating and a 600 Vac voltage rating with adjustable thermal and magnetic trip. The device supports 50/60 Hz operation and provides 200 kAIC at 240 Vac, 150 kAIC at 480 Vac, and 50 kAIC at 600 Vac. This enables selective protection, reducing nuisance trips while protecting feeders and downstream equipment.
Yes, it is engineered for 50/60 Hz systems and is appropriate for motor control centers, distribution panels, and control cabinets in manufacturing or facilities environments. Its four-pole design improves neutral protection and coordination in multi-line applications, making it suitable for both new installations and panel retrofits requiring reliable protection.
The JGU4125AAG is UL Listed, CSA Certified, and CE Marked, indicating compliance with North American and international safety standards. This simplifies vendor qualification, aids regulatory submissions, and supports multi-region deployments where strict safety and performance criteria are mandated.
Eaton provides a warranty under the company’s policy, typically aligned with a one-year period from installation or eighteen months from shipment, whichever comes first. Regular inspection, torque verification, and periodic testing help sustain performance, reduce unexpected downtime, and improve total cost of ownership for critical power protection assets.