Eaton STS366NW11 Shunt Trip Safety Switch - NEMA 4X
Part Number: STS366NW11
Quick Summary
Eaton shunt trip safety switch is a remote disconnection device that provides rapid power isolation for motor controls and switchgear. Engineers often struggle with unplanned downtime and safety risk during maintenance; this solution minimizes downtime by enabling fast, reliable remote tripping. Key certifications include UL Listed and cUL Certified, with a rugged NEMA 4X enclosure in 304 stainless steel that withstands washdown and harsh environments, while the fusible protection adds an extra layer of fault isolation. In practice, this device supports robust electrical protection in industrial panels, substations, and control cabinets, delivering reliability and safety while reducing maintenance costs and risk exposure. When you need strong protection with easy integration into control architectures and spare parts availability, STS366NW11 is a compelling choice.
Product Information
Extended Description
STS366NW11 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
STS366NW11
UPC
786685829128
Product Length/Depth
12.43 in
Product Height
62.97 in
Product Width
28.29 in
Product Weight
149 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
cUL Certified UL Listed
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 → Business Impact → Application: The STS366NW11 delivers a 600 A amperage rating in a three-pole configuration, enabling reliable main protection in large motor control centers and switchgear assemblies. This translates to improved uptime and safer shutdowns during fault conditions, especially in high-load industrial environments such as stamping, extrusion, and material handling. Application-wise, operators benefit from straightforward remote disconnection that minimizes arc flash risk and accelerates maintenance workflows in harsh settings. Feature → Business Impact → Application: A 24 Vac coil supports seamless integration with standard control circuits, enabling remote actuation from PLCs and safety interlocks without reconfiguring power circuits. This reduces installation time and wiring complexity, making retrofits and new builds more cost-effective for automation projects and energy management initiatives. Feature → Business Impact → Application: The NEMA 4X enclosure crafted from 304 stainless steel provides corrosion resistance and outdoor compatibility, which lowers enclosure maintenance and extends service life in washdown areas, outdoor substations, and coastal facilities. Application-wise, this translates to fewer field replacements and predictable performance in challenging environments. Feature → Business Impact → Application: Auxiliary contact configuration 1 NO-1 NC with an alarm switch improves status signaling to control systems and HMI alerts, enabling proactive maintenance and rapid fault diagnostics in batch processing lines, conveyors, and packaging lines. Feature → Business Impact → Application: Fusible protection adds a layer of selective coordination, enhancing protection coordination and reducing collateral damage during short circuits, which is valuable in power distribution panels and machine rooms. Feature → Business Impact → Application: UL Listed and cUL Certified status ensures compliance with global electrical standards, simplifying procurement and reducing qualification time for international projects, while the durable construction supports long-term warranties and predictable crane-to-floor performance.
Get a Quick Quote for a Eaton STS366NW11
Chat with us on WhatsApp - fast responses guaranteed
Need to speak with someone? We'll call you back within 2 hours during business hours
Interested in Eaton STS366NW11?
Enquire Now
FAQs
The STS366NW11 is a three-pole shunt trip safety switch rated for 600 A, designed to interface with standard MCCs and switchgear. The 24 Vac coil enables remote actuation from common control circuits, while the 1 NO-1 NC auxiliary contact provides status signaling to PLCs or HMIs. This combination supports safe, compliant shutdowns without major control-system redesigns.
Installation leverages the rugged NEMA 4X enclosure made of 304 stainless steel, suitable for washdown and outdoor environments. Ensure proper mounting clearance for the 12.43 in depth, 62.97 in height, and 28.29 in width, and verify compatible control wiring for a 24 Vac coil. Follow the manufacturer’s datasheet for wiring diagrams and safety procedures.
Fusible protection provides selective fault isolation, reducing the impact of a fault on downstream equipment and electrical networks. In combination with a remote trip function, it improves overall system reliability, minimizes arc-flash exposure during maintenance, and supports safer, faster fault clearance in high-current applications.
This device is UL Listed and cUL Certified, confirming compliance with recognized safety standards. Such certifications simplify procurement for regulated industries and facilitate international deployments, ensuring consistent performance and safer operation across different sites and jurisdictions.
With a durable 304 stainless steel NEMA 4X enclosure and a robust 600 A rating, maintenance needs are minimal for typical industrial environments. The remote trip capability reduces downtime during faults, lowers maintenance costs, and extends service life of connected equipment, delivering a favorable total cost of ownership over time.