Eaton shunt trip safety switch STS366UD61 - UL Listed
Part Number: STS366UD61
Quick Summary
Eaton shunt trip safety switch STS366UD61 provides reliable overcurrent protection for electrical panels and motor control centers. This device helps engineers avoid costly downtime by promptly interrupting power during fault conditions. UL Listed and cUL Certified, along with rugged NEMA 12 and NEMA 3R enclosures, ensure dependable operation in challenging environments. The product features a 600 A amperage rating with a 24 Vdc coil and a 1 NO-1 NC contact, enabling straightforward integration with existing control schemes. For procurement teams, this non-fusible protection device reduces maintenance complexity and supports higher system availability, while engineers gain a clear, industry-standard solution for panel protection and safety.
Product Information
Extended Description
STS366UD61 Eaton: Eaton shunt trip safety switch, 600 A, Three-pole, 600 Vac, 250 Vdc, Alarm switch, 24 Vdc, 1 NO-1 NC, NEMA 12, NEMA 3R, Non-Fusible, 600 V
Product Name
Eaton shunt trip safety switch
Catalog Number
STS366UD61
UPC
786685829272
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
cUL Certified UL Listed
Auxiliary contacts
Alarm switch
Enclosure
NEMA 12, NEMA 3R
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 - STS366UD61
Three-pole design and 600 A rating translate into decisive interruption on fault events, minimizing arc energy exposure and reducing spare parts and maintenance costs. This enables safer, more reliable panel operation in manufacturing lines and large machines. The device supports 600 Vac and 250 Vdc with a 24 Vdc coil, simplifying mixed-power control wiring and shortening installation timelines in automation projects. Non-Fusible protection combined with an alarm switch contact improves fault signaling and can be integrated with plant safety systems for quicker response times and reduced downtime. The rugged NEMA 12 and NEMA 3R enclosures provide protection against dust, liquids, and environmental exposure, expanding applicability in wash-down areas and outdoor equipment. With 1 NO-1 NC contact and three-pole configuration, wiring remains straightforward and compatible with standard control schemes, reducing design complexity. In practice, engineers see lower maintenance costs and faster commissioning when deploying this Eaton switch in motor control centers and panelboards.
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FAQs
STS366UD61 is a three-pole device designed for panel mounting with NEMA 12 and NEMA 3R enclosures. Plan for a 1 NO-1 NC auxiliary contact, a 24 Vdc coil, and wiring that supports 600 Vac, 250 Vdc operation. Ensure proper derating, cable entry, and secure mounting to minimize vibration and ensure reliable actuation during faults.
Key ratings include 600 A amperage, 600 Vac and 250 Vdc voltage ratings, and a 24 Vdc control coil. The device is non-fusible and features a 1 NO-1 NC contact configuration, with a three-pole design suitable for large electrical distributions and motor control centers.
Yes, STS366UD61 uses NEMA 12 and NEMA 3R enclosures, which provide protection against dust and moisture in many industrial settings. While it does not specify IP ratings, the enclosure selection supports use in typical factory environments, with proper installation and enclosure sealing practices to extend life in challenging conditions.
The device is UL Listed and cUL Certified, reflecting compliance with widely recognized electrical safety standards. These marks support regulatory acceptance in North American markets and streamline qualification for panel assemblies, safe operation of power distribution, and adherence to procurement specifications in industrial facilities.
Non-fusible protection reduces wear-related failure modes and simplifies maintenance. The 1 NO-1 NC alarm contact supports integration with alarm systems, enabling proactive fault signaling. The combination of rugged enclosure, standardized coil voltage, and full regulatory compliance contributes to reduced downtime, faster commissioning, and a lower total cost of ownership for large-scale motor control and panel protection projects.