Eaton FG3020 Engine Generator MCCB - 18 kAIC at 240 Vac
Part Number: FG3020
Quick Summary
The Eaton FG3020 engine generator molded case circuit breaker provides reliable short-circuit and overload protection for generator-based power systems. Engine-generator protection is a common pain point, as nuisance trips or miscoordination can cause costly downtime and equipment wear. This FG3020 carries UL Listed, CSA Certified, and IEC Rated marks, with UL 489 and IEC 947-2 conformance that supports global installations. Fixed thermal and magnetic trips, a three-pole FG frame, and line/load terminals enable predictable coordination and straightforward panel integration. With a compact footprint and lightweight design, it offers easy retrofit and scalable protection for standby gensets in manufacturing, data centers, and field service contexts.
Product Information
Extended Description
FG3020 Eaton: Eaton Series C complete EG molded case circuit breaker, F-frame, FG, Fixed thermal and magnetic trips, Three-pole, 20A, 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
FG3020
UPC
786679269527
Product Length/Depth
7 in
Product Height
6 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.
Certifications
IEC Rated UL Listed CSA Certified CSA Std. C22.2 No. 5 UL 489 IEC 947-2
Amperage Rating
20 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
14 kAIC at 480 Vac 18 kAIC at 240 Vac
Generator rating
7 kVA/6 kW at 240 Vac, 14 kVA/12 kW at 480 Vac, 18 kVA/14 kW at 600 Vac
Number of poles
Three-pole
Functions
Reverse
Engine generator circuit breakers catalog
Circuit Breakers Explained
Eaton Specification Sheet - FG3020
Feature: Three-pole FG frame design with fixed thermal and magnetic trips. Business Impact: Delivers predictable overcurrent protection, reduces nuisance trips, and simplifies coordination with generator feeds across multiple voltages. Application: Suitable for engine-generator sets in standby power configurations requiring robust protection and reliable uptime. Feature: Line/load terminals and complete engine-generator molded case integration. Business Impact: Eases installation, minimizes wiring errors, and accelerates panel mounting in retrofit projects. Application: Ideal for retrofits or new builds where quick, code-compliant implementation matters. Feature: Amperage rating of 20 A at 600 Vac with 60 Hz operation and T186 trip type. Business Impact: Supports accurate protection sizing, minimizes inrush nuisance trips, and ensures fast fault clearance. Application: Protects critical generator circuits in 240, 480, and 600 Vac networks. Feature: Generator ratings across voltages: 7 kVA/6 kW at 240 Vac, 14 kVA/12 kW at 480 Vac, 18 kVA/14 kW at 600 Vac. Business Impact: Enables proper sizing for standby gensets, ensuring safe operation and code compliance. Application: Efficiently protects diverse generator sets and loads in industrial facilities. Feature: Certifications and warranty context from Eaton policies. Business Impact: Enhances procurement confidence and regulatory alignment with UL, IEC, and CSA standards, supported by a one-year (or 18-month from shipment) policy. Application: Suitable for global deployments and warranty-backed maintenance planning in manufacturing, data centers, and service fleets.
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FAQs
The FG3020 is a three-pole molded case circuit breaker designed for engine-generator protection, featuring line/load terminals and a fixed trip. It integrates easily into standard engine-generator panels and aligns with 60 Hz, 600 Vac systems. For installation, confirm panel cutouts, ensure correct line/load orientation, and verify clearance for the 7 in x 6 in x 5 in footprint to maintain proper heat dissipation and service access.
FG3020 provides a 20 A rating at 600 Vac with fixed (pickup) T186 trip characteristics. It supports generator protection across voltages up to 600 Vac and is rated for 60 Hz operation. The interrupt rating is 18 kAIC at 240 Vac and 14 kAIC at 480 Vac, enabling fast fault clearance and protection of generator windings and connected loads.
Yes, FG3020 is designed for 600 Vac generator panels. It provides durable overcurrent protection with fixed thermal and magnetic trips, three-pole operation, and line/load terminals for straightforward wiring. It also supports generator sizing with ratings such as 18 kVA/14 kW at 600 Vac, offering reliable protection for standby and critical-load applications in industrial environments.
FG3020 carries UL Listed, CSA Certified, and IEC Rated marks, with UL 489 and IEC 947-2 conformance. These certifications help satisfy global electrical codes and supplier qualification requirements, reduce risk in audits, and support procurement in multinational facilities. The unit also aligns with Eaton’s warranty policy, aiding maintenance planning and total cost of ownership considerations.
Expect minimal preventive maintenance due to fixed trips and robust construction, with routine visual inspections and torque checks on line/load terminals. ROI benefits come from reduced downtime due to faster fault clearance, improved system reliability, and simplified panel integration that lowers labor costs during installation. The FG3020’s compatibility with multiple generator ratings supports scalable protection across a mixed-gen-set fleet.