Eaton KG3300WS43X01 Complete Engine Generator MCCB - UL/IEC
Part Number: KG3300WS43X01
Quick Summary
Eaton KG3300WS43X01 is a complete engine generator molded case circuit breaker designed to protect generator-based electrical systems. Selecting protection for standby and prime generator applications can be challenging, risking nuisance trips and extended downtime during start-up. It is certified to IEC 947-2, UL 489, and CSA Std. C22.2 No. 5, with UL Listing E7819 and MIL-DTL-17361 compliance, supporting global compliance requirements. This solution simplifies integration by offering fixed thermal/magnetic trips and a left-side shunt-trip option for rapid shutdown. For industrial facilities, it delivers reliable engine-generator protection, reduces maintenance cycles, and improves overall uptime without compromising safety or performance. Designed for field retrofit and factory floor installation, it supports standard mounting and wiring configurations.
Product Information
Extended Description
KG3300WS43X01 Eaton: Eaton Series C complete EG molded case circuit breaker, K-frame, KG, Fixed thermal, fixed magnetic trip, 500-1000A trip rating, Three-pole, 300A, 600 Vac, no term., optional load side, 12-24 Vac/dc opposite side w/ left pigtail TA300K
Product Name
Eaton complete engine generator molded case circuit breaker
Catalog Number
KG3300WS43X01
UPC
782116980512
Product Length/Depth
12 in
Product Height
6.5 in
Product Width
7 in
Product Weight
11.8 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
IEC 947-2 CSA Std. C22.2 No. 5 UL Listed file E7819 UL 489 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
Shunt trip
12-24 Vac/dc left pigtail opposite
Terminals
Without terminals, optional load side
Frame
K
Frequency rating
60 Hz
Class
Engine generator
Prod load
TA300K
Interrupt rating
18 kAIC at 240 Vac 14 kAIC at 480 Vac
Number of poles
Three-pole
Trip rating
500-1000 A
Functions
Reverse
Engine generator circuit breakers catalog
Circuit Breakers Explained
Eaton Specification Sheet - KG3300WS43X01
Feature KG3300WS43X01 provides integrated protection for generator-driven electrical systems with fixed thermal and fixed magnetic trips, delivering precise coordination. Business impact: a 300 A rating and 600 Vac capability in a three-pole, frame K device delivers reliable interruption performance (18 kAIC at 240 Vac, 14 kAIC at 480 Vac) and scalable protection for generator panels. Application: ideal for engine-generator control cabinets in standby or prime power applications, enabling compact, code-compliant protection. Feature The TA300K left-side shunt-trip enables remote shutdown for safety and rapid fault response. Business impact: reduces startup risk and downtime by enabling safe interlocks with BMS or emergency systems. Application: OEM panels and retrofit installations. Feature The KG frame with 3 poles, trip range 500–1000 A, and 60 Hz operation supports dependable coordination with generator controls. Business impact: enables customized protection schemes for medium-sized gensets in harsh industrial environments. Application: utility-scale facilities and data centers. Feature Certifications and compliance include IEC 947-2, UL 489, CSA Std. C22.2 No. 5, UL Listed E7819, MIL-DTL-17361, and QPL17361. Business impact: ensures global regulatory readiness and streamlined procurement. Application: projects spanning multiple regions with stringent standards. Feature Physical footprint and accessibility include 12 in length, 7 in width, and 6.5 in height with a weight of 11.8 lb; terminals are optional with load side capability. Business impact: easy mounting, wiring, and potential space savings in control panels. Application: new builds and retrofits in compact electrical rooms. Feature Warranty and service terms reflect Eaton policy 25-000: one year from installation or 18 months from shipment, whichever occurs first. Business impact: reduces lifecycle risk and clarifies ownership during commissioning. Application: all installations requiring formal vendor support.
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FAQs
The KG3300WS43X01 is a three-pole KG-frame molded case circuit breaker rated at 300 A, designed for 600 Vac systems. For installation, mount in a suitable enclosure, wire to the optional load side terminals if used, and connect the left-side 12-24 Vac/dc shunt-trip wiring TA300K as required. Ensure panel clearances meet MCCB installation guidelines and verify 60 Hz compatibility.
Key specs include 300 A amperage rating, 600 Vac voltage rating, three-pole configuration, frame K, and trip type T186. Interrupt rating is 18 kAIC at 240 Vac and 14 kAIC at 480 Vac, with a 60 Hz frequency rating. It supports a 12-24 Vac/dc left shunt-trip option and is designed for fixed thermal and magnetic trips.
Yes. The 500-1000 A trip rating, three-pole 600 Vac capability, and shunt-trip option make it well-suited for engine-generator protection in both standby and prime power configurations. Its 18 kAIC / 14 kAIC interrupt ratings help coordinate with generator controls, ATS logic, and panel protection in demanding environments.
The unit carries IEC 947-2, UL 489, CSA Std. C22.2 No. 5, UL Listed E7819, MIL-DTL-17361, and QPL17361. These certifications verify regulatory compliance across regions, ensure electrical safety and performance, and simplify cross-border procurement for global projects such as data centers and manufacturing facilities.
Eaton provides a standard warranty per policy 25-000: one year from installation or eighteen months from shipment, whichever occurs first. This warranty covers manufacturing defects and supports field servicing, with available data sheets and catalog references to assist with installation, maintenance planning, and ROI evaluation.