Eaton KG3350WA12S43D05X02 Engine Generator MCCB - UL Listed
Part Number: KG3350WA12S43D05X02
Quick Summary
The Eaton KG3350WA12S43D05X02 engine-generator MCCB protects power systems in industrial generator sets. Engineers often grapple with protecting generators against surge, overload, and miscoordination during startup. This device meets UL Listed, CSA, IEC 947-2, MIL-DTL-17361 standards, supporting compliance across critical power systems. With 600 Vac protection, a 350 A rating, and shunt-trip as well as auxiliary options, it enables scalable panel design, easier maintenance, and reduced downtime. Designed for engine-generator applications with a K-frame and metric mounting hardware, it supports 60 Hz operation and remote signaling through a left-side shunt trip and right-side auxiliary contacts, delivering reliable protection in demanding environments.
Product Information
Extended Description
KG3350WA12S43D05X02 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, 12-24 Vac/dc opposite side w/ left pigtail, Reverse feed, 60 Hz
Product Name
Eaton complete engine generator molded case circuit breaker
Catalog Number
KG3350WA12S43D05X02
UPC
786685465654
Product Length/Depth
12.5 in
Product Height
6.5 in
Product Width
7 in
Product Weight
11 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 file E7819 UL 489 CSA Std. C22.2 No. 5 IEC 947-2 QPL17361
Type
Engine generator
Amperage Rating
350 A
Voltage rating
600 Vac
Trip Type
T268
Circuit breaker type
KG
Circuit breaker frame type
Complete breaker
Auxiliary switch
2A-2B same side with right pigtail
Shunt trip
12-24V left pigtail opposite
Terminals
Load side, line side end cap
Frame
K
Frequency rating
60 Hz
Class
Engine generator
Mounting hardware
Metric
Prod load
TA350K
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 - KG3350WA12S43D05X02
Feature: Engine-generator molded case breaker provides focused protection for generator sets. Business Impact: Reduces unscheduled downtime by limiting damage from overloads and faults. Application: Ideal for standby and prime generator installations where reliable protection is essential. In practice, this translates to higher system uptime and predictable maintenance cycles in industrial facilities. Feature: 350 A amperage rating and 600 Vac voltage rating. Business Impact: Matches medium-size genset protection needs, enabling efficient coordination with generator and switchgear. Application: Fits 126 kVA and larger gensets at 240/480/600 Vac, supporting scalable power architectures without overutilization. Feature: Trip Type T268 with shunt trip and 2A-2B auxiliary. Business Impact: Enables fast, remote isolation and flexible control schemes for plant-wide safety interlocks. Application: Remote signaling and automated response in critical processes, reducing fault escalation. Feature: High interrupt ratings of 18 kAIC at 240 Vac and 14 kAIC at 480 Vac. Business Impact: Enhances fault-current handling for high-demand loads, improving protection margins and compliance with electrical codes. Application: Suitable for motor-start surges and dense industrial loads where fault current is a concern. Feature: Three-pole, KG frame, metric mounting hardware. Business Impact: Simplifies replacement and integration with standard paneldesigns, reducing install time and misalignment risk. Application: Panels and switchgear that require a compact, robust protection module for engine-driven systems. Feature: Shunt trip 12-24 V with left pigtail and auxiliary switch 2A-2B with right pigtail. Business Impact: Supports advanced control schemes and remote operation, enabling safer shutdowns and status signaling. Application: Critical plants with remote monitoring and automation needs. Feature: Comprehensive generator ratings — 126 kVA/101 kW at 240 Vac, 253 kVA/202 kW at 480 Vac, 316 kVA/253 kW at 600 Vac. Business Impact: Provides precise sizing guidance, reducing overdesign and improving protection accuracy. Application: Engine-generator sets used in manufacturing lines, data centers, and critical facilities.
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FAQs
Install the unit as a three-pole KG frame MCCB with metric mounting hardware. Connect load and line ends to the end caps, utilize the left-side shunt trip (12-24 V) for remote activation, and use the right-side 2A-2B auxiliary contacts for signaling. Ensure proper panel clearance and follow the MIL-DTL-17361 and UL/CSA guidelines to maintain ratings and venting requirements.
The device is rated for 350 A at 600 Vac, with trip type T268. It provides 18 kAIC at 240 Vac and 14 kAIC at 480 Vac, and supports three poles. It also includes a shunt trip (12-24 V) and an auxiliary switch (2A-2B) on the opposite side, with 60 Hz operation and a complete KG frame designation.
Yes. The catalog specifies UL Listed (E7819) with UL 489 approval, CSA Std. C22.2 No. 5, IEC 947-2, and MIL-DTL-17361 compliance, ensuring regulatory alignment for safety, performance, and interoperability in industrial power systems.
Generator ratings covered include 126 kVA/101 kW at 240 Vac, 253 kVA/202 kW at 480 Vac, and 316 kVA/253 kW at 600 Vac, enabling protection for a range of engine-generator configurations commonly used in manufacturing, data centers, and critical facilities.
Warranty follows Eaton Selling Policy 25-000: one year from installation or eighteen months from shipment, whichever occurs first. Warranty cover includes typical manufacturing defects and performance under specified conditions.