Eaton KG3300 Engine Generator MCCB - UL Listed
Part Number: KG3300
Quick Summary
The Eaton KG3300 Engine Generator MCCB provides essential overcurrent protection for engine-driven electrical systems. It helps maintenance teams avoid nuisance trips and compatibility issues with fixed-trip schemes in generator applications. UL Listed, CSA Certified and IEC Rated certifications ensure safe, interoperable operation across North American and international environments. The compact, line-and-load-capable design plus the included terminals support faster installation, reduced wiring complexity, and predictable protection performance for high-demand engine-generator sets. By balancing protection accuracy with installation practicality, this device delivers measurable business value through improved uptime and reduced lifecycle costs.
Product Information
Extended Description
KG3300 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, Line/load, Engine generator, Reverse feed, 60 Hz
Product Name
Eaton complete engine generator molded case circuit breaker
Catalog Number
KG3300
UPC
786679197103
Product Length/Depth
14.75 in
Product Height
6.25 in
Product Width
6.75 in
Product Weight
13.24 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
MIL-DTL-17361
Certifications
UL Listed CSA Certified IEC Rated UL Listed file E7819 CSA Std. C22.2 No. 5 UL 489 IEC 947-2 QPL17361
Catalog Notes
Includes both line and load terminals
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
Line and load
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 - KG3300
Feature: Complete engine-generator molded case circuit breaker with fixed thermal and magnetic trips. Benefit: Reliable fault protection tuned for engine-driven systems, reducing downtime and extending generator life. Application: Engine-generator sets operating at 60 Hz. Feature: Three-pole KG frame with line and load terminals included. Benefit: Simplified installation and robust field wiring for faster commissioning. Application: Industrial power distributions needing compact, plug-and-play protection in generator houses. Feature: 300 A amperage rating with 600 VAC voltage rating. Benefit: Supports high-load engine-generator configurations while maintaining precise trip coordination. Application: Medium to heavy-duty generator protection in 60 Hz operations. Feature: Interrupt ratings of 14 kAIC at 480 VAC and 18 kAIC at 240 VAC. Benefit: Enhanced fault clearance capacity for critical equipment and bus configurations. Application: OEM and retrofit projects requiring strong short-circuit withstand. Feature: Certifications include UL Listed, CSA Certified, IEC Rated. Benefit: Compliance across markets with proven safety and interoperability. Application: Global deployments with standard regulatory expectations. Feature: MIL-DTL-17361 compliances noted in specifications. Benefit: Additional environmental and mechanical resilience for harsh industrial settings. Application: Aerospace, defense, and industrial facilities demanding rigorous standards.
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FAQs
KG3300 is a three-pole, 300 A, 600 VAC molded-case circuit breaker with line and load terminals included. It is designed for engine-generator systems operating at 60 Hz and supports reverse feed configurations, making it a drop-in protection solution for many standard generator installations.
Key specs include: three-pole KG frame, 300 A rating, 600 VAC, trip type T186, interrupt ratings of 14 kAIC at 480 VAC and 18 kAIC at 240 VAC, and 60 Hz operation. These figures help coordinate with upstream and downstream protective devices in generator circuits.
Yes. KG3300 carries UL Listed and CSA Certified marks and IEC Rated certification, with additional references to UL 489 and IEC 947-2 compatibility. These certifications support regulatory compliance across North America and international markets.
Eaton’s warranty policy 25-000 provides one year from installation or eighteen months from shipment, whichever occurs first. This supports maintenance planning and asset lifecycle cost control for industrial users.
KG3300 is best suited for engine-generator protection in industrial facilities, OEM generator assemblies, and retrofit projects requiring reliable line/load protection, 60 Hz operation, and solid short-circuit withstand in demanding environments.