Eaton STS366UW3 Shunt Trip Safety Switch - NEMA 4X
Part Number: STS366UW3
Quick Summary
Eaton shunt trip safety switch provides remote-trip protection for electrical panels in industrial settings. This design helps minimize downtime while enhancing operator safety by enabling rapid isolation during faults. UL Listed and cUL Certified protections accompany a rugged NEMA 4X enclosure, offering dependable performance in harsh environments. The device leverages a three-pole configuration with a 600 A rating and a 120 VAC coil, delivering robust control and compatibility with modern automation systems. For engineers and procurement teams, this unit delivers reliable safety, easier compliance, and a clear path to scalable protection across power distribution and automation architectures.
Product Information
Extended Description
STS366UW3 Eaton: Eaton shunt trip safety switch, 600 A, Three-pole, 600 Vac, 250 Vdc, 120 Vac, NEMA 4X, 304 stainless steel, Non-Fusible, 600 V
Product Name
Eaton shunt trip safety switch
Catalog Number
STS366UW3
UPC
786685829418
Product Length/Depth
12.43 in
Product Height
62.97 in
Product Width
28.29 in
Product Weight
140 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
Non-Fusible
Voltage rating
600 Vac, 250 Vdc
Feature: 600 A amperage rating and three-pole configuration → Business Impact: Heavy-load protection reduces fuse replacements and minimizes unplanned downtime in motor control centers and distribution panels. Application: Suitable for large industrial gear where reliable isolation is critical. Feature: 120 VAC coil voltage → Business Impact: Seamless integration with standard control circuits and PLC outputs, enabling fast, remote tripping without extra power supplies. Application: Control panels and automation cabinets requiring remote safety coordination. Feature: Voltage rating of 600 VAC and 250 VDC → Business Impact: Dual-voltage compatibility supports a wide range of AC and DC circuits, simplifying panel design and stocking. Application: Mixed-voltage installations in process plants and manufacturing lines. Feature: NEMA 4X enclosure in 304 stainless steel → Business Impact: Corrosion and washdown resistance extend service life in harsh environments, reducing maintenance costs. Application: Outdoor enclosures, chemical plants, and food/beverage facilities. Feature: Non-fusible, three-pole safety switch → Business Impact: Lower replacement costs and quicker field servicing while maintaining robust protection. Application: Main safety disconnects in industrial power distribution. Feature: Certifications UL Listed and cUL Certified → Business Impact: Streamlined regulatory compliance and safer procurement, easier vendor qualification. Application: Environments with strict electrical protection standards. Feature: Dimensions and weight (12.43 in depth, 62.97 in height, 28.29 in width, 140 lb) → Business Impact: Clear physical footprint aids panel planning and on-site handling for installation crew. Application: Retrofit projects and new builds in large power distribution assemblies. Feature: Warranty terms (one year from installation or 18 months from shipment) → Business Impact: Defined support window improves budgeting and risk management for capital projects. Application: New installations and replacements in mission-critical facilities.
Get a Quick Quote for a Eaton STS366UW3
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 STS366UW3?
Enquire Now
FAQs
STS366UW3 is engineered for three-pole disconnect configurations capable of handling up to 600 A. Ensure the enclosure mounting matches the panel design, verify adequate clearance for the 12.43 in depth, and confirm control wiring using the 120 VAC coil. The unit’s NEMA 4X stainless steel housing supports outdoor or washdown environments, simplifying field deployment in plant floors and MCCs.
The 120 VAC coil is designed to interface with standard control circuits and PLC outputs, enabling remote trip signaling from safety relays or interlocks. This reduces wiring complexity, improves response time during fault events, and supports compatibility with common industrial control architectures without additional power supplies or adapters.
Yes. The unit features a NEMA 4X enclosure made of 304 stainless steel, delivering corrosion resistance and protection against dust, water, and washdown processes. This makes it appropriate for outdoor installations, chemical processing areas, and facilities requiring rigorous cleanliness and durability standards.
STS366UW3 carries UL Listed and cUL Certified marks, indicating adherence to recognized safety standards for electrical equipment. These certifications simplify procurement in regulated environments, support conformance with electrical codes, and help ensure reliable performance within quality management systems.
With a non-fusible design and a robust stainless-steel enclosure, maintenance intervals are predictable and downtime is minimized during routine inspections. The 1-year warranty (or 18 months from shipment) provides initial risk coverage, while the unit’s durability and compatibility with existing 600 A systems contribute to reduced replacement costs and faster fault isolation, delivering a favorable total cost of ownership in large-scale automation projects.