Eaton FG3150 Engine Generator MCB - 18 kAIC 240V UL Listed
Part Number: FG3150
Quick Summary
Eaton FG3150 Engine Generator MCB provides reliable fault protection for engine-driven power systems used in generator and standby applications. Engine-driven systems often suffer nuisance trips or misapplication, leading to costly downtime and maintenance. UL Listed and CSA Certified markings, along with IEC 947-2 and UL 489 compliance, support safe installation across facilities. Engine generator circuit protection for a three-pole frame with fixed trips ensures fast response in 60 Hz networks, reducing fault duty. In practice, technicians value the product's compatibility with line and load terminals and its fixed 150 A rating for engine-generator sets. This translates to smoother maintenance scheduling, clearer spare-part planning, and faster field acceptance for project teams.
Product Information
Extended Description
FG3150 Eaton: Eaton Series C complete EG molded case circuit breaker, F-frame, FG, Fixed thermal and magnetic trips, Three-pole, 150A, 600 Vac, 18 kAIC at 240 Vac, 14 kAIC at 480 Vac, Line/load, Engine generator, Reverse, 60 Hz, Fixed
Product Name
Eaton complete engine generator molded case circuit breaker
Catalog Number
FG3150
UPC
786679269800
Product Length/Depth
7 in
Product Height
5 in
Product Width
5 in
Product Weight
4 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 IEC Rated CSA Certified UL Listed file E7819 IEC 947-2 UL 489 CSA Std. C22.2 No. 5 QPL17361
Catalog Notes
Includes both line and load terminals
Type
Engine generator
Amperage Rating
150 A
Voltage rating
600 Vac
Trip Type
T186
Circuit breaker type
FG
Circuit breaker frame type
Complete breaker
Terminals
Line and load
Frame
F
Frequency rating
60 Hz
Class
Engine generator
Pickup
Fixed
Interrupt rating
18 kAIC at 240 Vac 14 kAIC at 480 Vac
Generator rating
54 kVa/43 kW at 240V, 108 kVA/87 kW at 480V, 135 kVA/108 kW at 600V
Number of poles
Three-pole
Functions
Reverse
Engine generator circuit breakers catalog
Circuit Breakers Explained
Eaton Specification Sheet - FG3150
Selling Policy 25-000 - Distribution and Control Products and Services
Feature: Three-pole FG frame molded case circuit breaker with fixed thermal and magnetic trips. Business Impact: Delivers predictable, fast fault interruption for engine-generator circuits, reducing unplanned downtime and protecting critical generator equipment. Application: Ideal for engine-generator sets and standby power panels where robust start-up protection is essential. Feature: High interrupt ratings of 18 kAIC at 240 Vac and 14 kAIC at 480 Vac. Business Impact: Enables safe handling of high fault currents in generator banks, improving system reliability and safety margins. Application: Suitable for 600 Vac distribution in industrial facilities and vehicle or remote power solutions. Feature: 150 A amperage rating with line and load terminals included. Business Impact: Simplifies installation, minimizes field modifications, and ensures code-compliant protection right out of the box. Application: Engine-generator protection in new builds or retrofits with standard MCCB terminations. Feature: Comprehensive generator ratings: 54 kVa/43 kW at 240V; 108 kVA/87 kW at 480V; 135 kVA/108 kW at 600V. Business Impact: Enables accurate system sizing and coordination with generator sets and switchgear, reducing over- or under-protection. Application: Coordinated protection for multi-voltage generator sets. Feature: Includes line and load terminals, 60 Hz operation, and MIL/IEC compliant construction. Business Impact: Accelerates installation and ensures regulatory compatibility across North American and international projects. Application: Panel builders and integrators seeking plug-and-play protection for engine-driven systems with reliable warranty backing.
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FAQs
FG3150 ships with line and load terminals for straightforward panel mounting. It is a three-pole, fixed-trip device rated for 60 Hz at 600 Vac, suitable for engine-generator panels. Follow manufacturer torque values and ensure proper enclosure clearance for safe operation.
Amperage rating is 150 A; voltage rating is 600 Vac with 60 Hz operation. Interrupt ratings are 18 kAIC at 240 Vac and 14 kAIC at 480 Vac, which supports high fault-current environments in generator networks.
Yes. FG3150 carries UL Listed and CSA Certified markings, along with IEC compatibility, ensuring safe installation and broader regulatory compliance in industrial environments.
Size the device to a 150 A rating and align with the generator’s output (54 kVa/43 kW at 240V; 108 kVa/87 kW at 480V; 135 kVa/108 kW at 600V). Use line/load terminals as provided and coordinate with upstream protection to prevent nuisance trips while maintaining rapid fault interruption.
FG3150 is covered by Eaton Selling Policy 25-000, offering one year from installation or eighteen months from shipment, whichever occurs first, providing protection against manufacturing defects and ensuring support during initial deployment.