Eaton STS366NW61 Shunt Trip Safety Switch - NEMA 4X
Part Number: STS366NW61
Quick Summary
The Eaton STS366NW61 shunt trip safety switch protects essential panels by instantly interrupting power in demanding environments. Downtime from false trips and unclear fault signaling costs technicians time and threatens production schedules. UL Listed and cUL Certified, with a NEMA 4X enclosure protection, ensure compliance in washdown and harsh environments. Designed for 600 A loads with a 24 Vdc coil and 1 NO-1 NC contact, it delivers reliable protection while simplifying panel integration. Compact 12.43 in depth by 28.29 in width fits standard enclosures, while stainless steel construction supports long-term durability in industrial settings. This combination reduces maintenance costs and extends equipment life, making it a prudent choice for manufacturers seeking safety and uptime.
Product Information
Extended Description
STS366NW61 Eaton: Eaton shunt trip safety switch, 600 A, Three pole, 600 Vac, 250 Vdc, Alarm switch, 24 Vdc, 1 NO-1 NC, NEMA 4X, 304 stainless steel, Fusible, 600 V
Product Name
Eaton shunt trip safety switch
Catalog Number
STS366NW61
UPC
786685829180
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
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 Vdc
Protection
Fusible
Voltage rating
600 Vac, 250 Vdc
Contact configuration
1 NO-1 NC
Double Up on Safety
Double Up on Safety
Double Up on Safety
Eaton Specification Sheet - STS366NW61
Selling Policy 25-000 - Distribution and Control Products and Services
Feature a three-pole design rated for 600 A and engineered for 600 Vac / 250 Vdc applications. Business impact: robust motor control and power distribution protection that minimizes the risk of chain-reaction outages in critical lines. Application: motor control centers, switchgear assemblies, and process lines requiring dependable emergency shutoff. Feature a rugged 304 stainless steel enclosure with NEMA 4X protection. Business impact: corrosion resistance and washdown capability translate to lower maintenance and longer life in hostile environments. Application: food and beverage plants, chemical processing, and outdoor panels. Feature an auxiliary alarm switch (1 NO-1 NC) for real-time fault signaling. Business impact: enhanced visibility for PLCs and automation systems, enabling faster response and reduced downtime. Application: integrated safety monitoring and alarm logic. Feature a 24 Vdc coil and fusible protection. Business impact: seamless integration with low-voltage control circuits while safeguarding upstream equipment from surges and faults. Application: control panels with DC signaling and protective fusing schemes. Feature a clear safety and compliance package with UL Listed and cUL Certified status. Business impact: simplifies regulatory approvals and mitigates risk during audits. Application: any industrial installation where safety certification is essential. Feature a substantial physical footprint (12.43 in L, 28.29 in W, 62.97 in H) and 149 lb weight. Business impact: durable, tamper-resistant protection suitable for heavy-duty environments; installation considerations addressed up front. Application: large switchgear retrofits and new builds requiring a robust protective interlock.
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FAQs
For proper installation, ensure mounting within a suitable panel footprint that accommodates a three-pole unit rated at 12.43 inches long, 28.29 inches wide, and 62.97 inches tall. Use the 304 stainless steel NEMA 4X enclosure to resist washdown environments, and provide adequate electrical clearance for the 24 Vdc coil and 600 V-rated contacts. Weight (approximately 149 lb) should be factored into mounting hardware and support structures.
Key specs include a 600 A amperage rating, three-pole configuration, 600 Vac and 250 Vdc voltage ratings, a 24 Vdc coil, and a 1 NO-1 NC contact arrangement. The device is fusible and designed for reliable interlocks within industrial control circuits, enabling safe and fast disconnection when commanded.
Yes. The enclosure is NEMA 4X, and it uses 304 stainless steel, providing excellent corrosion resistance and washdown capability. This makes it well suited for environments with moisture, dust, and chemical exposure, while maintaining regulatory compliance and reliable operation over time.
The STS366NW61 carries UL Listed and cUL Certified markings, which support compliance with safety and performance standards in North America. These certifications aid in passing regulatory audits and ensuring consistent safety practices in industrial installations.
By reducing unscheduled downtime through reliable tripping and clear fault signaling (via the auxiliary alarm switch), plants can minimize production stoppages and maintenance surprises. The rugged stainless enclosure and high amperage capacity also extend equipment life, lowering replacement costs and improving uptime in demanding production lines.