Eaton STS366UW61 Shunt Trip Safety Switch - NEMA 4X
Part Number: STS366UW61
Quick Summary
Eaton STS366UW61 shunt trip safety switch provides remote-trip protection for motor control centers. It helps prevent costly downtime by quickly disconnecting power during faults or abnormal events. UL Listed and cUL Certified with a NEMA 4X enclosure ensures safe, compliant operation in harsh environments. Designed for 600 A circuits with a 24 Vdc coil, it aligns with heavy-duty control architectures and simplifies procurement across EPC projects.
Product Information
Extended Description
STS366UW61 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, Non-Fusible, 600 V
Product Name
Eaton shunt trip safety switch
Catalog Number
STS366UW61
UPC
786685829456
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 Vdc
Protection
Non-Fusible
Voltage rating
600 Vac, 250 Vdc
Contact configuration
1 NO-1 NC
Switching Devices Flex Center
Switching Devices Flex Center
Switching Devices Flex Center
Eaton Specification Sheet - STS366UW61
Selling Policy 25-000 - Distribution and Control Products and Services
Feature: 600 A amperage rating and 600 Vac / 250 Vdc voltage rating. Business Impact: enables safe, single-point interruption of high-current circuits, reducing spare-part inventory and downtime. Application: MCC feeders and distribution panels in manufacturing facilities. Feature: 24 Vdc coil and three-pole configuration. Business Impact: integrates with low-voltage control systems for remote-trip signaling while ensuring all phases trip together. Application: control circuits wired to PLCs and safety interlocks in automation lines. Feature: NEMA 4X enclosure and 304 stainless steel body. Business Impact: delivers corrosion resistance and washdown compatibility, lowering maintenance costs and extending service life. Application: outdoor installations, chemical plants, and food processing environments. Feature: Alarm switch auxiliary contact (1 NO-1 NC). Business Impact: supports remote monitoring and interlock logic, enabling early fault detection. Application: plant-wide safety monitoring and building management system (BMS) integration. Feature: Compliance and warranty. Business Impact: UL Listed and cUL Certified ensure regulatory compliance; warranty policy provides protection against defects and support during installation. Application: procurement, asset management, and long-term reliability in industrial settings.
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FAQs
Plan for a three-pole installation that matches the panel’s rating. Verify the 600 A current capability, 600 Vac / 250 Vdc voltage, and the 24 Vdc coil compatibility with your control system. Ensure proper mounting clearance, wiring terminations per manufacturer instructions, and torque specs from the datasheet. The EN 4X enclosure supports installation in tougher environments, reducing future rework.
The device uses a 24 Vdc coil and a 1 NO-1 NC contact configuration, with an auxiliary alarm switch. This arrangement enables remote-trip signaling and simple integration with PLCs or safety interlocks, while allowing local annunciation of a fault condition via the alarm contact.
Yes. It features a NEMA 4X enclosure and 304 stainless steel construction, delivering corrosion resistance and washdown compatibility. This makes it well-suited for outdoor installations, chemical processing, and food/beverage processing environments where moisture and contaminants are present.
The product is UL Listed and cUL Certified, meeting widely adopted electrical safety standards for North American installations. These certifications support compliance in regulated facilities and facilitate procurement across multi-site projects.
Eaton provides a warranty per policy 25-000: one year from installation or eighteen months from shipment, whichever occurs first. This, combined with its robust stainless-steel enclosure and high-current rating, contributes to reduced maintenance costs, fewer field failures, and predictable long-term asset performance.