Eaton KG3350W Engine Generator MCB - 600 Vac, 350 A
Part Number: KG3350W
Quick Summary
KG3350W Engine Generator Molded Case Circuit Breaker protects generator power systems in engine-driven installations. Engine rooms and outdoor substations demand protection that won’t fail during load surges or reverse-feed events. This unit is IEC Rated, UL Listed, and CSA Certified, reinforcing compliance across global standards and simplifying audits. With a 350 A rating and 600 Vac operation, it supports reliable protection for 60 Hz generator configurations, and its three-pole, K-frame design fits standard enclosures with minimal modification. The no-terminals version and thermal-magnetic trip provide swift isolation, reducing fault impact and maintenance complexity. For procurement teams, the combination of robust protection, documented certifications, and compact form factor translates to lower risk and faster service life cycles.
Product Information
Extended Description
KG3350W 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, No term., Engine generator, Reverse feed, 60 Hz
Product Name
Eaton complete engine generator molded case circuit breaker
Catalog Number
KG3350W
UPC
786679269466
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
IEC Rated CSA Certified UL Listed IEC 947-2 UL 489 CSA Std. C22.2 No. 5
Amperage Rating
350 A
Voltage rating
600 Vac
Trip Type
T268
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
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 - KG3350W
Feature: Thermal-magnetic trip with T268 rating provides fast fault isolation. Business Impact: Reduces equipment damage, downtime, and arc-flash exposure by clearing faults quickly. Application: Ideal for engine-driven generator sets operating at 60 Hz and 600 Vac, ensuring reliable protection during surge events. Feature: Amperage rating of 350 A supports controlled feeder protection. Business Impact: Limits fault currents to protect generator and downstream devices while enabling coordinated trip schemes. Application: Suitable for medium-current generator protections in stand-by and prime installations. Feature: Voltage rating of 600 Vac delivers ample insulation margins. Business Impact: Enhances electrical safety margins and compatibility with standard generator control systems. Application: Enables integration with common 600 Vac generator outlets and switchgear. Feature: Interrupt rating of 14 kAIC at 480 Vac and 18 kAIC at 240 Vac ensures high short-circuit withstand. Business Impact: Minimizes damage under fault conditions and reduces replacement costs. Application: Critical for engine-generator feeders feeding critical loads. Feature: Three-pole frame KG with a complete breaker design offers robust mechanical fit. Business Impact: Simplifies installation, improves operational reliability, and reduces field modification time. Application: Fits standard K-frame enclosures in engine generator installations. Feature: Without terminals option provides flexible terminal configurations. Business Impact: Allows tailored wiring schemes and easier retrofits without rework. Application: Useful for OEMs and integrators aligning with bespoke control panels.
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FAQs
KG3350W is a three-pole KG frame molded case breaker designed for engine-generator protection. It comes in a no-terminals option for flexible terminal configurations, supports 60 Hz operation at 600 Vac, and uses a thermal-magnetic trip (T268) for fast isolation. When selecting a mounting location, ensure clear access for testing and maintenance, confirm enclosure compatibility with a K-frame form, and coordinate with the generator controller to achieve proper coordination and selectivity.
The KG3350W is UL Listed, CSA Certified, and IEC Rated, with references to IEC 947-2 and CSA Std. C22.2 No. 5. These certifications assure compliance with global electrical protection standards, simplify audit trails, and aid in OEM and system integrator qualification, reducing risk in multi-site deployments.
Interrupt ratings are 14 kAIC at 480 Vac and 18 kAIC at 240 Vac, while generator ratings are 126 kVA/101 kW at 240 Vac, 253 kVA/202 kW at 480 Vac, and 316 kVA/253 kW at 600 Vac. These specifications enable safe, reliable operation under fault conditions and support sizing for engine-generator feeders and connected loads.
Yes. The KG3350W is designed for engine generator protection and includes a thermal-magnetic trip that helps isolate faults and manage reverse-feed scenarios. Its 600 Vac, 60 Hz compatibility and three-pole configuration make it a robust choice for standby and prime generator circuits.
Eaton provides a warranty per Selling Policy 25-000, one year from installation or eighteen months from shipment, whichever occurs first. This covers manufacturing defects and supports service planning, replacements, and limited maintenance through standard Eaton channels.