Eaton KG3300W Engine Generator MCCB - UL Listed
Part Number: KG3300W
Quick Summary
Eaton KG3300W engine generator MCCB provides rugged overcurrent protection for engine-generator systems. Engine-driven installations face nuisance trips and downtime when protection isn’t precisely coordinated. The KG3300W meets UL Listed, CSA Certified, and IEC rated standards, offering reliable performance across North American and international projects. Its fixed thermal and magnetic trips, three-pole KG frame, and 600 Vac rating simplify integration in portable and standby generator sets. With compact dimensions 12.25 in L, 6.9 in H, and 6.75 in W, and a 300 A rating, it delivers dependable engine generator protection without complicating wiring. This supports ongoing uptime, regulatory compliance, and lower total cost of ownership for industrial protection schemes.
Product Information
Extended Description
KG3300W Eaton: Eaton Series C complete EG molded case circuit breaker, K-frame, KG, Fixed thermal and magnetic trips, 500-1000A, Three-pole, 300A, 600 Vac, 18 kAIC at 240 Vac, 14 kAIC at 480 Vac, No term., Engine generator, Reverse feed, 60 Hz
Product Name
Eaton complete engine generator molded case circuit breaker
Catalog Number
KG3300W
UPC
786679269442
Product Length/Depth
12.25 in
Product Height
6.9 in
Product Width
6.75 in
Product Weight
10 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
CSA Std. C22.2 No. 5 IEC Rated CSA Certified IEC 947-2 UL Listed UL 489
Type
Complete breaker
Amperage Rating
300 A
Voltage rating
600 Vac
Trip Type
T186
Circuit breaker type
KG
Circuit breaker frame type
Complete breaker
Terminals
Without terminals
Frame
K
Frequency rating
60 Hz
Class
Engine generator
Interrupt rating
14 kAIC at 480 Vac 18 kAIC at 240 Vac
Number of poles
Three-pole
Trip rating
500-1000 A
Functions
Reverse
Engine generator circuit breakers catalog
Circuit Breakers Explained
Eaton Specification Sheet - KG3300W
Fixed thermal and magnetic trips provide precise protection for generator loads, reducing nuisance trips and enabling faster fault isolation—minimizing downtime in critical standby power applications. The 300 A rating with a 600 Vac, 60 Hz specification aligns with common engine-generator sets, delivering scalable protection for data centers, remote facilities, and industrial plants. Three-pole KG frame design enhances phase coordination and simplifies panel integration, while the 14 kAIC at 480 Vac and 18 kAIC at 240 Vac interrupt ratings ensure high fault-current handling without compromise on safety. Certifications including UL Listed, CSA Certified, and IEC rated support regulatory compliance for North American and international installations. The unit is shipped without terminals, reducing shipping damage and allowing field wiring tailored to site requirements, improving installation efficiency. Warranty terms offer protection against early failures, contributing to lower lifecycle costs for maintenance teams.
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FAQs
KG3300W requires a compatible 3-pole, K-frame enclosure and field wiring since terminals are not included. Plan for 600 Vac, 60 Hz operation and verify the unit fits your panel layout with dimensions of 12.25 in L, 6.9 in H, and 6.75 in W. Ensure proper clearance for maintenance and confirm reverse-feed capability is supported by the surrounding protection scheme.
KG3300W provides a 300 A amperage rating, 600 Vac voltage rating, and a T186 trip type. It is a three-pole KG frame complete breaker, with a 60 Hz frequency rating. It supports fault current interruption of 18 kAIC at 240 Vac and 14 kAIC at 480 Vac, suitable for engine-generator protection and reverse feed scenarios.
Yes. The KG3300W includes a reverse protection function and is designed specifically for engine-generator protection. Its three-pole configuration, fixed thermal and magnetic trips, and high interrupt ratings support safe, reliable operation in reverse-feed and standby generator installations while maintaining coordination with other protective devices.
KG3300W carries UL Listed, CSA Certified, and IEC rated certifications, with references to CSA Std. C22.2 No. 5 and IEC 947-2 standards. These certifications ensure compliance across North American and international installations, simplify procurement for regulated industries, and help satisfy regulatory requirements for engine-generator protection equipment used in mission-critical facilities.
The KG3300W's robust protection reduces unplanned downtime and fault-related outages, translating to lower maintenance costs and greater system availability. With Eaton’s warranty policy (one year from installation or eighteen months from shipment), users gain added risk mitigation and predictable total cost of ownership for industrial standby power deployments.