Eaton KG3400WA12S43D05X04 Engine Generator MCCB - UL Listed
Part Number: KG3400WA12S43D05X04
Quick Summary
Eaton KG3400WA12S43D05X04 engine generator molded case circuit breaker provides robust protection for industrial generator sets. When generators power critical operations, nuisance trips and protection gaps can disrupt uptime and inflate maintenance costs. This model meets UL Listed, IEC 947-2, and CSA standards, ensuring consistent safety performance across harsh environments. With a 400 A amperage rating and 600 Vac capability in a compact KG frame, it simplifies installation and strengthens engine generator protection for standby and prime power systems, delivering reliable protection without sacrificing space or serviceability.
Product Information
Extended Description
KG3400WA12S43D05X04 Eaton: Eaton complete EG molded case circuit breaker, K-frame, KG, Thermal-magnetic trip, 1000-2000A trip rating, Three-pole, 400A, Load side, line side end cap, Metric, 2A-2B same side w/right pigtail, 12-24 Vac/dc opposite side w/left pigtail
Product Name
Eaton complete engine generator molded case circuit breaker
Catalog Number
KG3400WA12S43D05X04
UPC
786685465661
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 IEC 947-2 UL 489 CSA Std. C22.2 No. 5 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
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
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 - KG3400WA12S43D05X04
Implementation of arc flash mitigating solutions at industrial manufacturing facilities
Feature: 400 A amperage rating and a three-pole KG frame deliver strong short-circuit protection and coordinated control with large generator sets. Business Impact: Reduces the risk of cascading faults and unplanned outages, improving equipment longevity and system reliability. Application: Ideal for standby and prime generator installations in manufacturing facilities and data centers. Feature: 18 kAIC interrupt rating at 240 Vac and 14 kAIC at 480 Vac enables fast isolation of high fault currents, lowering arc energy exposure. Application: Suitable for industrial switchgear bays and power distribution where high fault currents are possible. Feature: Shunt trip 12-24 V left pigtail and auxiliary switch 2A-2B right pigtail provide remote trip signaling and control integration. Business Impact: Enhances safety procedures and allows centralized protection schemes with minimal wiring complexity. Application: Critical facility protection and remote annunciation in engine-generator panels. Feature: Metric mounting hardware, compact footprint (12.5 in L, 6.5 in H, 7 in W) and a weight of 11 lb enable easy enclosure fitment and serviceability. Business Impact: Reduces installation time and panel space requirements while improving maintainability. Application: Enclosures for industrial generators and power control centers. Feature: Comprehensive certifications and a solid warranty (one year from installation or 18 months from shipment) support regulatory compliance and total cost of ownership reduction. Application: Facilities subject to stringent safety standards and long-term maintenance planning.
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FAQs
KG3400WA12S43D05X04 is designed for three-pole generator panels with metric mounting hardware. Ensure proper alignment with the KG frame, connect the line and load terminals to the designated end caps, and integrate the 12-24 V shunt trip and 2A-2B auxiliary switch as required for remote signaling and control. The compact 11 lb unit fits standard generator enclosures and supports straightforward wiring to existing control circuits.
Key specs include a 400 A amperage rating, 600 Vac, three-pole configuration, and a T268 trip type. The interrupt rating is 18 kAIC at 240 Vac and 14 kAIC at 480 Vac, with generator ratings up to 361 kVA at 600 Vac. These figures guide coordination with generator protection schemes and ensure adequate fault clearing and system reliability.
Yes. The KG3400WA12S43D05X04 is engineered for engine generator protection in demanding environments, offering high fault current interruption, remote trip capability, and UL/IEC/CSA certifications. Its 400 A/600 Vac ratings and metric mounting simplify integration into data center standby power systems while maintaining compliance and safe operation.
This device carries UL Listed (E7819), IEC 947-2, UL 489, and CSA Std. C22.2 No. 5 certifications, with QPL17361 for extended compliance. MIL-DTL-17361 compliance is noted as well. These certifications support safety, interchangeability, and reliability across industrial electrical installations.
The product is covered by Eaton’s warranty policy 25-000 for one year from installation or 18 months from shipment, whichever occurs first. For maintenance, inspect the trip unit, test remote signaling paths, and verify shunt trip/auxiliary connections during regular panel servicing to sustain reliable operation and protect total cost of ownership.