Eaton STS366FW14 Shunt Trip Safety Switch - UL Listed
Part Number: STS366FW14
Quick Summary
Eaton shunt trip safety switch provides fast, reliable isolation for motor control centers and switchgear applications. This device addresses the common challenge of safe startup and rapid power disconnection in demanding industrial environments. UL Listed and cUL Certified with a NEMA 4X enclosure (304 stainless steel) ensure rugged reliability in harsh locations, while 600 A capacity, 24 Vac coil, and 600 Vac/250 Vdc ratings support flexible control schemes. Implementing this device reduces arc flash exposure, improves compliance, and lowers total cost of ownership by simplifying maintenance and configuration for three-pole protection.
Product Information
Extended Description
STS366FW14 Eaton: Eaton shunt trip safety switch, 600 A, Three-pole, 600 Vac, 250 Vdc, Alarm switch, 24 Vac, 1 NO 1 NC, NEMA 4X, 304 stainless steel, Fusible, 600 V
Product Name
Eaton shunt trip safety switch
Catalog Number
STS366FW14
UPC
786685828855
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
Auxiliary contacts
Alarm switch
Enclosure
NEMA 4X
Enclosure material
304 stainless steel
Number Of Poles
Three-pole
Type
Shunt trip safety switch
Amperage Rating
600A
Coil voltage
24 Vac
Protection
Fusible
Voltage rating
600 Vac, 250 Vdc
Contact configuration
1 NO 1 NC
Feature: High current and voltage ratings. Business Impact: Supports heavy motor loads with robust protection, reducing nuisance trips and enabling reliable startup in demanding applications. Application: Main feeders and motor control centers require dependable 600 A capability and a dual voltage rating of 600 Vac / 250 Vdc, ensuring compatibility with mixed control circuits. Feature: Three-pole construction. Business Impact: Ensures synchronized switching and enhanced safety by isolating all phases in a single action, lowering fault propagation risk. Application: Ideal for three-phase switchgear where coordinated tripping is critical for personnel safety and machine protection. Feature: 24 Vac coil with 1 NO 1 NC auxiliary. Business Impact: Enables seamless integration with plant control networks and alarms, supporting remote signaling and status monitoring to improve maintenance planning. Application: Control panels and PLC interfaces benefit from simple wiring and reliable signaling. Feature: NEMA 4X enclosure with 304 stainless steel. Business Impact: Delivers rugged, corrosion-resistant protection in washdown and outdoor environments, reducing maintenance frequency and downtime. Application: Harsh production floors, chemical plants, and outdoor MCC installations. Feature: Fusible protection and alarm contact. Business Impact: Provides built-in safety coordination, reducing arc flash risk and enabling quick fault indication for operators and supervisors. Application: Integrated safety schemes in industrial plants and service centers benefit from a compact, ready-to-deploy solution. Feature: Certifications and compliance alignment. Business Impact: UL Listed and cUL Certified support regulatory compliance and supplier confidence, accelerating procurement cycles. Application: Widely adopted in industrial automation projects requiring recognized safety standards, with dependable performance in rugged environments.
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FAQs
Begin by confirming panel suitability for a 600 A, three-pole device and verify the 24 Vac coil control circuit. Mount the unit on a stable, corrosion-resistant surface inside a NEMA 4X enclosure. Connect the control wiring to the 24 Vac coil and wire the auxiliary alarm contacts to the plant signaling system. Verify clear labeling and perform a functional test per Eaton specs to ensure proper tripping and signaling.
Key specs include a 600 A amperage rating, three-pole configuration, 24 Vac coil, and voltage ratings of 600 Vac / 250 Vdc. It features 1 NO and 1 NC auxiliary contact for signaling. The enclosure is NEMA 4X, constructed from 304 stainless steel, and it is Fusible for selective protection in appropriate systems.
Yes. The STS366FW14 uses a 304 stainless steel enclosure with a NEMA 4X rating, designed for corrosion resistance and washdown environments. This makes it well-suited for outdoor, chemical, and industrial settings where environmental protection and reliability are critical for continuous operation.
The product is UL Listed and cUL Certified, providing recognized safety compliance. These certifications support regulatory acceptability across North American markets and help streamline procurement in design-build and compliant projects.
The device improves uptime by providing rapid, reliable isolation during faults, reducing unplanned downtime. Its integrated alarm signaling simplifies fault diagnosis, and the rugged NEMA 4X enclosure lowers maintenance costs in harsh environments. Overall, expect lower maintenance overhead, improved safety compliance, and shorter downtime recovery times.