Eaton STS366UW11 Shunt Trip Safety Switch - UL Listed
Part Number: STS366UW11
Quick Summary
Eaton STS366UW11 shunt trip safety switch delivers rapid isolation for high-current electrical panels. Facility teams often need fast, reliable shutoff during faults or maintenance to protect personnel and critical equipment. UL Listed and cUL Certified, this unit also features a NEMA 4X enclosure and corrosion-resistant 304 stainless steel, suitable for harsh environments. With a 600 A rating and 24 Vac coil, it supports safe, compliant control of large motor loads while simplifying installation and panel integration. Engineers will appreciate the 1 NO-1 NC auxiliary contact and the 600 Vac / 250 Vdc rating for versatile wiring schemes. This makes it a practical upgrade for existing control panels seeking safer shutdown, minimized downtime, and simplified compliance documentation.
Product Information
Extended Description
STS366UW11 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, Non-Fusible, 600 V
Product Name
Eaton shunt trip safety switch
Catalog Number
STS366UW11
UPC
786685829395
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
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
Non-Fusible
Voltage rating
600 Vac, 250 Vdc
Contact configuration
1 NO-1 NC
Feature 600 A amperage rating → Business Impact Enables reliable interruption of large motor loads, reducing fault duration and protecting downstream equipment; Application Suitable for motor control centers, main switchgear, and heavy-duty feeders. Feature 24 Vac coil → Business Impact Improves integration with standard control circuits, reducing wiring complexity and coordination with PLC/SCADA systems; Application Ideal for panel-level control and remote shutoff. Feature 1 NO-1 NC auxiliary contact → Business Impact Provides signaling and interlock capability for alarms and safety interlocks; Application Enhances machine safety monitoring and event logging in industrial automation. Feature NEMA 4X enclosure made of 304 stainless steel → Business Impact Delivers corrosion and washdown resistance, extending service life in harsh environments; Application Outdoor installations, chemical plants, and food/beverage facilities. Feature Three-pole design → Business Impact Ensures complete isolation across all three phases, improving safety in three-phase motor applications; Application Used in MCCs and multi-pole disconnect schemes. Feature Voltage rating 600 Vac / 250 Vdc → Business Impact Supports mixed-voltage systems, enabling flexible integration into complex control architectures; Application Suitable for facilities running both AC and DC controls. Feature Non-Fusible protection → Business Impact Simplifies maintenance with predictable contact operation and reduced arc flash exposure; Application Beneficial for retrofit projects in existing safety circuits. Feature UL Listed and cUL Certified → Business Impact Aligns with regulatory requirements, accelerating compliance and documentation; Application Helpful for safety approvals in machinery and panel builds. This combination of rugged construction, thoughtful wiring options, and proven certifications makes the STS366UW11 a dependable choice for panel builders and maintenance teams seeking measurable reliability, reduced downtime, and safer operations.
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FAQs
The STS366UW11 is designed for high-current, three-phase applications such as motor control centers and main switchgear. Its 600 A amperage rating ensures reliable fault isolation, reducing downtime and protecting motors, drives, and feeders during faults or maintenance tasks. The device integrates with standard control circuits via a 24 Vac coil, delivering compatible, predictable performance in industrial panels.
Key specs include a three-pole configuration, 600 Vac / 250 Vdc voltage ratings, 24 Vac coil voltage, and auxiliary contact 1 NO-1 NC. The enclosure is NEMA 4X and constructed from 304 stainless steel, with a non-fusible protection scheme. Certification credentials include UL Listed and cUL Certified, making it suitable for regulated industrial environments.
Yes. The STS366UW11 uses a NEMA 4X enclosure crafted from 304 stainless steel, designed to resist corrosion, washdown, and harsh plant conditions. This makes it well-suited for outdoor panels and facilities with exposure to moisture, dust, or aggressive cleaning schedules, while maintaining reliable operation and safety signaling.
The device is UL Listed and cUL Certified, signaling conformance to recognized safety standards for electrical protection devices. These certifications streamline compliance documentation, support regulatory approvals for machinery, and provide assurance to specifiers and maintenance teams that the safety switch meets industry-wide reliability and safety requirements.
By delivering reliable isolation with a robust 600 A rating, a durable 304 stainless steel NEMA 4X enclosure, and a simple 24 Vac control interface, maintenance intervals can be extended and downtime minimized. The integrated 1 NO-1 NC auxiliary contact supports signaling and interlocks, reducing wiring changes during future upgrades and enhancing overall panel safety and reliability.