Eaton JG3100CT Engine MCCB - 14 kAIC UL Listed
Part Number: JG3100CT
Quick Summary
The Eaton JG3100CT engine MCCB provides reliable overcurrent protection for generator sets and engine-driven electrical systems. Designers often struggle with reverse-feed configurations and mixed-voltage layouts that complicate protection coordination. This unit is UL Listed, CSA Certified, and IEC rated, ensuring broad compliance for both North American and international generator applications. By pairing 60 Hz operation with 600 Vac rails and a 100 A capacity, it streamlines installation and reduces lifecycle costs, delivering robust protection without compromising accessibility or serviceability.
Product Information
Extended Description
JG3100CT Eaton: Eaton Series C complete EG molded case circuit breaker, J-frame, Complete breaker, Thermal-magnetic trip, Three-pole, 100A, 600 Vac, 14 kAIC at 480 Vac, Line and load, Engine generator, Reverse feed, 60 Hz
Product Name
Eaton complete engine generator molded case circuit breaker
Catalog Number
JG3100CT
UPC
786679108833
Product Length/Depth
4.06 in
Product Height
10 in
Product Width
4.13 in
Product Weight
9.21 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.
Certifications
UL Listed IEC Rated CSA Certified IEC 947-2 UL 489 CSA Std. C22.2 No. 5
Amperage Rating
100 A
Voltage rating
600 Vac
Trip Type
T268
Circuit breaker frame type
Complete breaker
Terminals
Line and load
Frame
J
Frequency rating
60 Hz
Class
Engine generator
Accessories
Center tap studs for dual voltage applications
Interrupt rating
14 kAIC at 480 Vac
Number of poles
Three-pole
Functions
Reverse
Engine generator circuit breakers catalog
Circuit Breakers Explained
Eaton Specification Sheet - JG3100CT
Feature → Business Impact → Application: The JG3100CT is a three-pole, 100 A molded case circuit breaker with a thermal-magnetic trip (T268), designed for engine-generator protection. This combination delivers fast, selective protection while minimizing nuisance trips in start-stop cycles common to generator loading, improving uptime for critical systems and reducing maintenance overhead. Application-wise, it excels in IEC-rated and UL-listed environments, including industrial facilities and backup power modules that require dependable restart behavior after faults. Feature → Business Impact → Application: The J-frame, complete breaker construction simplifies integration in existing engine-generator skids, with line and load terminals and center tap studs for dual voltage configurations. This compatibility reduces wiring errors, shortens installation time, and supports flexible voltage planning in mixed-voltage sites. Feature → Business Impact → Application: With a 14 kAIC interrupt rating at 480 Vac and 60 Hz operation, protection is robust enough to handle short-circuit transients without damaging downstream equipment, lowering the risk of collateral damage during fault events. Feature → Business Impact → Application: The product’s compact dimensions (4.06 in D, 4.13 in W, 10 in H) and 9.21 lb weight streamline enclosure design and ease field mounting, saving cabinet space and labor in large-scale power plants or remote generator installations. Feature → Business Impact → Application: Center tap studs for dual voltage applications, combined with UL/CSA/IEC certifications, address both OEM and end-user procurement needs, enabling one breaker to serve multiple configurations and reducing spare-part inventories. This aligns with industry best practices for engine-generator protection, where reliable coordination between protection devices minimizes downtime and extends service intervals.
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FAQs
The JG3100CT uses line and load terminals on a J-frame, with options for center tap studs to support dual voltage configurations. When installing on generator skid panels, verify clearance for 4.06 in depth and 10 in height, ensure proper labeling for 60 Hz operation, and confirm mounting aligns with standard engine-generator control panels to minimize wiring complexity and ensure fault coordination.
The JG3100CT is designed specifically for engine-generator protection with a complete breaker and a thermal-magnetic trip (T268). This configuration supports reverse-feed scenarios by maintaining stable protection during generator start-up, backfeed conditions, or back-up power transitions, reducing the risk of miscoordination and nuisance trips.
This model is UL Listed, CSA Certified, and IEC rated, encompassing IEC 947-2, UL 489, and CSA Std. C22.2 No. 5 among listed standards. These certifications ensure compliance with global electrical protection requirements, simplify supplier qualification, and support safe operation in both commercial and industrial generator environments.
Key specs include 100 A amperage rating, 600 Vac voltage rating, 3 poles, and a 14 kAIC interrupt rating at 480 Vac. Confirm these match your generator and distribution panel ratings, and ensure the control scheme accommodates a 60 Hz frequency, line-load configuration, and the reverse-feed protection capability of the JG3100CT.
By integrating a single, UL-listed, CSA-certified breaker with dual-voltage capability and center tap studs, the JG3100CT reduces part variety, simplifies commissioning, and lowers spare-part inventories. Its robust 14 kAIC rating minimizes fault damage, contributing to lower maintenance costs and less downtime in mission-critical generator applications.