Eaton STS366NW14 Shunt Trip Safety Switch - NEMA 4X

Part Number: STS366NW14
Manufacturer
Eaton
Part number
STS366NW14

Quick Summary

Eaton STS366NW14 shunt trip safety switch provides remote shutdown for industrial power panels. Maintenance teams often struggle with unreliable fault responses and corrosion in tough environments. This unit carries cUL Certified and UL Listed markings and uses a rugged NEMA 4X stainless steel enclosure, designed for harsh sites. Its three-pole construction, 600 A amperage rating, and 24 Vac coil enable fast, predictable tripping while limiting nuisance trips. By combining robust protection with straightforward installation, it reduces downtime, supports compliance with safety standards, and enhances operator safety across automation systems. In short, this device adds reliability and value to panel protection and machine safety programs.

Product Information

Extended Description

STS366NW14 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
STS366NW14
UPC
786685829135
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: Three-pole design with 600 A rating and a 24 Vac coil enables reliable isolation of high-load circuits, reducing risk to personnel and equipment. This leads to shorter fault-clearance times and fewer unplanned outages in critical lines such as conveyors and presses. Application: large-motor panels and process equipment in manufacturing environments. Feature → Business Impact → Application: NEMA 4X enclosure with 304 stainless steel construction delivers corrosion resistance and washdown compatibility. Benefit: extended service life and lower maintenance costs in food & beverage, chemical, and outdoor installations. Application: harsh or damp environments requiring robust enclosure protection. Feature → Business Impact → Application: Alarm switch (1 NO 1 NC) provides remote signaling and interlock integration with control systems. Value: improved visibility for operators and safer lockout/tagout procedures. Application: SCADA integration, safety interlocks, and remote monitoring across automated lines. Feature → Business Impact → Application: Fusible protection with 600 Vac and 250 Vdc ratings coordinates with downstream devices to minimize fault energy and coordinate protection schemes. Value: enhanced electrical safety and regulatory compliance. Application: panel-fed machine safety circuits and protective coordination. Feature → Business Impact → Application: Large footprint and 149 lb weight offer robust mechanical integrity and secure mounting in primary switchgear. Value: fewer vibration issues and dependable long-term installation. Application: panel integrations in high-vibration environments. Warranty & support: One-year warranty from installation or 18 months from shipment, with access to Eaton specification sheets and multimedia resources for installation and testing. This combination supports scalable safety strategies and reduces total cost of ownership in industrial protection devices.

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FAQs

STS366NW14 uses a NEMA 4X enclosure with 304 stainless steel construction, suitable for panel mounting in indoor and outdoor settings. Dimensions and mounting footprints align with standard switchgear panels to simplify integration into existing installations.
It features a 600 A amperage rating, three-pole configuration, 24 Vac coil, and voltage ratings of 600 Vac and 250 Vdc, with a 1 NO 1 NC contact configuration and fusible protection. An auxiliary alarm contact supports remote signaling.
Yes. The unit’s NEMA 4X enclosure in 304 stainless steel provides corrosion resistance and washdown compatibility, making it well-suited for industries like food & beverage, chemical processing, and outdoor installations.
STS366NW14 is cUL Certified and UL Listed, ensuring compliance with recognized safety standards. These certifications support regulatory acceptance and safer integration into controlled industrial environments.
The unit offers a one-year warranty (or 18 months from shipment) and rugged construction that reduces downtime and maintenance costs. Remote signaling and reliable tripping contribute to faster fault response and improved overall equipment effectiveness (OEE).