Eaton STS366FW3 Shunt Trip Safety Switch - NEMA 4X
Part Number: STS366FW3
Quick Summary
The Eaton shunt trip safety switch STS366FW3 provides fast circuit protection for industrial switchgear and control panels. Unplanned trips can halt production and drive maintenance costs; this device helps prevent nuisance trips while enabling rapid restoration. UL Listed and cUL Certified with a rugged NEMA 4X enclosure ensure safe operation in damp or harsh environments. With a 600 A rating, a 600 Vac supply, and a 304 stainless steel NEMA 4X enclosure, it delivers durable protection. This combination supports regulatory compliance and reduces downtime in critical MCCs and switchgear.
Product Information
Extended Description
STS366FW3 Eaton: Eaton shunt trip safety switch, 600 A, Three-pole, 600 Vac, 250 Vdc, 120 Vac, NEMA 4X, 304 stainless steel, Fusible, 600 V
Product Name
Eaton shunt trip safety switch
Catalog Number
STS366FW3
UPC
786685828862
Product Length/Depth
12.43 in
Product Height
62.97 in
Product Width
28.29 in
Product Weight
145 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
UL Listed cUL Certified
Enclosure
NEMA 4X
Enclosure material
304 stainless steel
Number Of Poles
Three-pole
Type
Shunt trip safety switch
Amperage Rating
600A
Coil voltage
120 Vac
Protection
Fusible
Voltage rating
600 Vac, 250 Vdc
Switching Devices Flex Center
Switching Devices Flex Center
Switching Devices Flex Center
Eaton Specification Sheet - STS366FW3
Three-pole construction with a shunt trip coil delivers rapid disconnect when signaled, improving fault clearance and personnel safety in motor control centers and feeder panels. The NEMA 4X enclosure in 304 stainless steel resists corrosion and wash-down exposure, reducing ongoing maintenance in outdoor or humid facilities. With 600 A and 600 Vac ratings plus fusible protection, the STS366FW3 simplifies protection design and lowers total ownership costs across large switchgear installations. Remote actuation is facilitated by the 120 Vac coil, enabling clean integration with standard control circuits and PLC IO. The unit's footprint—12.43 in depth, 28.29 in width, and 62.97 in height with a 145 lb weight—facilitates planning for large panels and MCCs. Eaton’s warranty and global certifications support asset protection and long-term reliability.
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FAQs
Plan mounting in a large enclosure using the 12.43 in depth, 28.29 in width footprint. Ensure proper clearance for three-pole operation and that the NEMA 4X stainless steel enclosure is sealed for the environment; verify coil wiring and fusible protection are correctly integrated.
The device provides 600 A Amperage rating, 600 Vac and 250 Vdc voltage ratings, and fusible protection, with a 120 Vac coil for remote control. This enables straightforward protection schemes in switchgear and MCCs.
Yes. The enclosure is NEMA 4X rated and built from 304 stainless steel, delivering corrosion resistance and wash-down compatibility for harsh industrial areas.
UL Listed and cUL Certified, indicating compliance with safety standards for industrial electrical equipment, which helps meet regulatory requirements and simplifies procurement in regulated facilities.
Warranty is one year from installation or eighteen months from shipment, whichever occurs first, per Eaton policy 25-000. Technical support and datasheets are available through Eaton and the distributor network.