Eaton KG3300WA12D05S43X02 Complete Breaker - UL 489
Part Number: KG3300WA12D05S43X02
Quick Summary
KG3300WA12D05S43X02 molded case circuit breaker protects engine-driven power systems by delivering reliable overcurrent protection. In genset or standby power applications, nuisance trips or delayed responses can drive costly downtime. This unit carries UL 489, CSA Std. C22.2 No. 5, and IEC 947-2 certifications, along with MIL-DTL-17361 compliance, underscoring its robust safety and performance profile. With 300 A, 600 Vac ratings and a K-frame, three-pole configuration, it supports demanding protection schemes while fitting standard metric mounting hardware. The combination of fixed thermal and magnetic trip, plus options like load-side end caps and shunt trip, provides flexible protection for modern industrial electrical protection and engine-generator systems.
Product Information
Extended Description
KG3300WA12D05S43X02 Eaton: Eaton complete EG molded case circuit breaker, K-frame, KG, Fixed thermal, fixed magnetic trip, Three-pole, 300A, Line side end cap, optional load side, 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
KG3300WA12D05S43X02
UPC
786685465647
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 489 CSA Std. C22.2 No. 5 UL Listed file E7819 IEC 947-2 QPL17361
Type
Complete breaker
Amperage Rating
300 A
Voltage rating
600 Vac
Trip Type
T186
Circuit breaker type
KG
Circuit breaker frame type
Complete breaker
Auxiliary switch
2A-2B same side with right pigtail
Shunt trip
12-24 Vac/dc left pigtail opposite
Terminals
Line side end cap, optional load side
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
Number of poles
Three-pole
Trip rating
500-1000 A
Functions
Reverse
Power Xpert Protection Manager x64
Engine generator circuit breakers catalog
Circuit Breakers Explained
Eaton Specification Sheet - KG3300WA12D05S43X02
Intelligent power starts with accurate, actionable data
Feature: KG frame three-pole design with 300 A at 600 Vac. Business Impact: Enables centralized protection for high-load engine generators, reducing risk of cascading faults and downtime. Application: Ideal for generator switchgear and power distribution panels in heavy industry. Feature: Fixed thermal and fixed magnetic trip with T186 performance. Business Impact: Delivers fast, predictable interruption with minimized nuisance trips, improving system reliability. Application: Critical genset protection in continuous or standby operations. Feature: Optional accessories including 2A-2B auxiliary switch and shunt trip (12-24 Vac/dc, left/right pigtail). Business Impact: Provides customizable automation and remote shutdown capabilities without complex rewiring. Application: Safe integration with interlocks and safety circuits in control rooms and equipment bays. Feature: Line side end cap and optional load side terminals. Business Impact: Simplifies field wiring and increases retrofit compatibility. Application: Streamlined installation in existing KG-frame enclosures. Feature: Compliance and mounting advantages with MIL-DTL-17361, UL 489, and CSA certifications plus metric mounting hardware. Business Impact: Reduces procurement risk and simplifies audits while ensuring reliable, repeatable performance. Application: Global deployment across industrial facilities that demand standards-based protection.
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FAQs
This model uses metric mounting hardware designed for KG-frame enclosures and supports line side end caps with optional load side connections. The holistic mounting approach simplifies retrofit projects, reduces wiring errors, and aligns with standard generator switchgear footprints, enabling straightforward integration into existing control panels without major enclosure redesign.
The breaker is rated for 600 Vac with an interrupt capability of 14 kAIC at 480 Vac and 18 kAIC at 240 Vac, providing strong fault interruption for high inrush or short-circuit events. This makes it suitable for heavy-duty engine-generator protection and demanding power distribution applications.
Yes. It features a three-pole, 300 A KG frame with fixed thermal and magnetic trip (T186) designed for engine-generator protection. With UL 489, CSA and IEC certifications and MIL-DTL-17361 compliance, it is specifically configured for reliable genset protection in industrial environments.
The breaker carries UL 489, CSA Std. C22.2 No. 5, UL Listed file E7819, IEC 947-2, and MIL-DTL-17361 compliance. These certifications address safety, performance, and compatibility requirements across North American and international markets, helping with regulatory approvals and supplier audits.
The unit’s fixed-tripping characteristics, robust interrupt ratings, and compatibility with optional accessories (shunt trip, auxiliary switch) minimize downtime and enable remote shutdown integration. Its metric mounting and standardized terminals simplify field service and retrofits, reducing lifecycle costs while improving overall system availability for critical power applications.