Eaton KG3400WD05X04 MCCB - 18 kAIC at 240V Engine Generator
Part Number: KG3400WD05X04
Quick Summary
The Eaton KG3400WD05X04 MCCB protects engine-generator power systems in critical electrical rooms. End users often grapple with arc-flash risk, nuisance trips, and inconsistent protection during generator start-up. UL Listed, CSA, IEC 947-2 certification, and MIL-DTL-17361 conformance back up reliability in demanding environments. With metric mounting and load- and line-side end caps, this complete KG frame breaker integrates quickly into existing generator installations, delivering safety, uptime, and compliant protection. Its 60 Hz operation and 600 Vac ratings align with common industrial generator specs, while the 400 A amperage rating supports substantial protection without unnecessary trips. For manufacturers and service teams, the device provides consistent performance across fleets and simplifies maintenance planning.
Product Information
Extended Description
KG3400WD05X04 Eaton: Eaton Series C complete EG molded case circuit breaker, K-frame, KG, Thermal-magnetic trip, 1000-2000A, Three-pole, 400A, 600 Vac, 18 kAIC at 240 Vac, 14 kAIC at 480 Vac, Load side, line side end cap, Metric, Reverse feed, 60 Hz
Product Name
Eaton complete engine generator molded case circuit breaker
Catalog Number
KG3400WD05X04
UPC
786685465616
Product Length/Depth
12.3 in
Product Height
6.2 in
Product Width
6.9 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.
Compliances
MIL-DTL-17361
Certifications
UL Listed file E7819 CSA Std. C22.2 No. 5 UL 489 IEC 947-2 QPL17361
Type
Engine generator
Amperage Rating
400 A
Voltage rating
600 Vac
Trip Type
T268
Circuit breaker type
KG
Circuit breaker frame type
Complete breaker
Terminals
Load side, line side end cap
Frame
K
Frequency rating
60 Hz
Class
Engine generator
Mounting hardware
Metric
Prod load
3TA400K
Interrupt rating
18 kAIC at 240 Vac 14 kAIC at 480 Vac
Generator rating
144 kVA/116 kW at 240 Vac, 289 kVA/231 kW at 480 Vac, 361 kVA/289 kW at 600 Vac
Number of poles
Three-pole
Trip rating
1000-2000 A
Functions
Reverse
Engine generator circuit breakers catalog
Circuit Breakers Explained
Eaton Specification Sheet - KG3400WD05X04
Implementation of arc flash mitigating solutions at industrial manufacturing facilities
Feature: Thermal-magnetic trip (T268) for precise overload protection. Business Impact: Reduces fault propagation and minimizes nuisance trips, improving uptime in high-load generator environments. Application: Engine-generator power protection in industrial facilities and data centers. Long-tail keywords: engine generator molded case circuit breaker, thermal-magnetic protection, T268 trip, generator protection, 60 Hz systems. Feature: Three-pole KG frame, complete breaker design. Business Impact: Simplifies installation and ensures coordinated protection across phases, reducing wiring complexity and commissioning time. Application: Retrofit and new-install generator sets with metric mounting requirements. Long-tail keywords: KG frame MCCB, complete breaker, three-pole protection, metric mounting, generator system integration. Feature: 400 A amperage rating at 600 Vac. Business Impact: Handles substantial generator output without unnecessary tripping, improving equipment availability. Application: High-capacity engine-generator protection in manufacturing and utilities. Long-tail keywords: 400 A MCCB, 600 Vac rating, generator rating, high-current protection. Feature: Interruption rating 18 kAIC at 240 Vac / 14 kAIC at 480 Vac. Business Impact: Enhanced fault current handling and safer isolation during faults, meeting stringent utility and OEM requirements. Application: Critical power distribution for large generators. Long-tail keywords: 18 kAIC at 240 Vac, 14 kAIC at 480 Vac, fault current rating, protective coordination. Feature: Compliance and mounting compatibility (MIL-DTL-17361, UL CSA IEC). Business Impact: Reduces compliance risk and accelerates procurement with standardized certification and metric mounting hardware. Application: Global OEMs and service providers delivering reliable generator protection. Long-tail keywords: MIL-DTL-17361, UL Listed, CSA, IEC 947-2, metric mounting, line-side end cap, load-side end cap.
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FAQs
Plan for metric mounting hardware and use the line-side end cap and load-side end cap to simplify wiring. The three-pole KG frame and compact 12.3 in length fit standard engine-generator enclosures, while the 60 Hz, 600 Vac rating ensures compatibility with typical generator output. Verify clearance for thermal-magnetic T268 trip operation and confirm UL CSA IEC certifications during commissioning.
Yes. The device is UL Listed (E7819), CSA Std. C22.2 No. 5, UL 489, IEC 947-2, and MIL-DTL-17361 compliant. This broad certification support confirms safe operation in global industrial environments and helps meet regulatory and procurement requirements for engine-generator protection.
The unit features a thermal-magnetic trip (T268) with an 18 kAIC rating at 240 Vac and 14 kAIC at 480 Vac, providing rapid fault interruption. With 400 A nominal current and three-pole configuration, it coordinates effectively with engine-generator sets to minimize damage and downtime during startup surges.
Yes. The breaker is designed with line-side end caps and load-side end caps to accommodate reverse-feed configurations where required. This feature enhances flexibility in generator protection schemes and simplifies integration with existing bus bars and switchgear.
It delivers improved uptime through precise protection, reduces arc-flash risk with certified safety features, and supports easier maintenance via standardized mounting and Eaton documentation. The large current rating, robust interrupt performance, and broad certifications help OEMs and service teams meet reliability targets across fleets.