Eaton KG3350 Engine Generator MCCB - 18 kAIC @240V
Part Number: KG3350
Quick Summary
Eaton KG3350 Engine Generator MCCB provides reliable overcurrent protection for engine-driven power systems in industrial panels and generator rooms. This unit addresses nuisance trips and miscoordination during generator start-up by delivering precise thermal-magnetic protection with a robust trip characteristic. It carries critical UL Listed and IEC Rated certifications, along with CSA certification, ensuring compliance across North American and international standards. Designed for 60 Hz operation, it supports 350 A ratings and line/load connectivity, while offering a shunt trip option to enable remote isolation and enhanced safety. For teams seeking dependable generator protection that scales with engine-generator sets, KG3350 combines performance with installation ease and long-term cost containment.
Product Information
Extended Description
KG3350 Eaton: Eaton Series C complete EG molded case circuit breaker, K-frame, KG, Thermal-magnetic trip, 500-1000A, Three-pole, 350A, 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
KG3350
UPC
786679197127
Product Length/Depth
12 in
Product Height
6 in
Product Width
7 in
Product Weight
11.5 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
IEC 947-2 CSA Std. C22.2 No. 5 UL Listed CSA Certified UL 489 IEC Rated
Amperage Rating
350 A
Voltage rating
600 Vac
Trip Type
T268
Circuit breaker type
KG
Circuit breaker frame type
Complete breaker
Shunt trip
12-24 Vac/dc same side with left pigtail shunt
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
Generator rating
126 kVA/101 kW at 240 Vac, 253 kVA/202 kW at 480 Vac, 316 kVA/253 kW at 600 Vac
Number of poles
Three-pole
Trip rating
500-1000 A
Functions
Reverse
Engine generator circuit breakers catalog
Circuit Breakers Explained
Eaton Specification Sheet - KG3350
Feature → Business Impact → Application: 350 A at 600 Vac with 18 kAIC at 240 Vac (14 kAIC at 480 Vac) provides strong fault current withstand and selective tripping, reducing downstream equipment damage and unplanned downtime in mission-critical generator rooms. This translates to measurable uptime gains and safer restoration sequences in industrial facilities and data centers that rely on engine-driven power. Application: Engine generator sets in 60 Hz systems needing reliable overcurrent protection and coordinated protection with parallel or sequential loads. Feature → Business Impact → Application: Three-pole KG frame with line/load terminals simplifies wiring, minimizes installation time, and improves serviceability in compact electrical closets. Application: OEM and retrofit projects where space is constrained and quick commissioning is required. Feature → Business Impact → Application: Shunt trip capability (12-24 Vac/dc with left pigtail) enables remote tripping for alarms or automation sequences, delivering enhanced safety, faster fault isolation, and easier integration with plant control systems. Application: Remote monitoring setups and emergency shutdown schemes. Feature → Business Impact → Application: Thermal-magnetic trip (T268) and 60 Hz compatibility deliver predictable, industry-proven protection for generator outputs, reducing nuisance trips during start-up and peak load transitions. Application: Panel builders and maintenance teams seeking reliable performance under generator transient conditions. Feature → Business Impact → Application: Complete engine-generator protection with a K-frame design supports straightforward mounting and compatibility with standard Eaton accessories, including reverse-feed configurations for engine-generator applications. Application: Retrofit projects and new builds where quick, repeatable installation and future expansion are priorities.
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FAQs
The KG3350 uses a K-frame design with line and load terminals for straightforward wiring. Mounting follows standard molded case breaker practices, and the unit supports 60 Hz generator systems with a three-pole configuration. For remote safety, the shunt trip option (12-24 Vac/dc, left pigtail) can be wired to plant controls to meet fast isolation requirements.
KG3350 is rated at 350 A with a 600 Vac operating voltage. It provides interrupt ratings of 18 kAIC at 240 Vac and 14 kAIC at 480 Vac. The trip type is T268, and the device is a three-pole KG frame molded case circuit breaker designed for engine-generator protection in 60 Hz systems.
Yes. KG3350 is certified to UL Listed, IEC Rated, and CSA standards, aligning with industry requirements for engine-driven power systems. Its robust thermal-magnetic trip and compatibility with reverse-feed configurations make it suitable for reliable operation in generator rooms and industrial facilities that demand dependable protection and compliance.
KG3350 carries UL Listed, IEC Rated, and CSA Certified markings, including UL 489 and IEC 947-2 usage. These certifications ensure the device conforms to widely accepted safety and performance standards, simplifying procurement for regulated environments and easing acceptance by governing bodies, inspectors, and OEMs.
The KG3350 reduces downtime through reliable protection against short circuits and improper generator start-up transients, while enabling remote trip via shunt coil. Its durable K-frame construction and standard terminals streamline installation, speeding commissioning and future maintenance. The result is lower maintenance costs, safer operation, and quicker restoration after faults in critical power applications.