Eaton STS366UP61 Shunt Trip Safety Switch - NEMA 4
Part Number: STS366UP61
Quick Summary
STS366UP61 shunt trip safety switch remotely trips breakers in large electrical panels. Maintenance teams often wrestle with unreliable fault isolation that leads to unplanned downtime and safety risks. UL Listed and cUL Certified components validate North American compliance, while the NEMA 4 painted steel enclosure withstands dust, water, and harsh environments. With a 600 A rating, 24 Vdc coil, and 1 NO-1 NC auxiliary contact, this non-fusible switch supports robust protection and easy integration into existing control schemes for safer, more reliable automation.
Product Information
Extended Description
STS366UP61 Eaton: Eaton shunt trip safety switch, 600 A, Three-pole, 600 Vac, 250 Vdc, Alarm switch, 24 Vdc, 1 NO-1 NC, NEMA 4, Painted steel, Non-Fusible, 600 V
Product Name
Eaton shunt trip safety switch
Catalog Number
STS366UP61
UPC
786685829364
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 4
Enclosure material
Painted 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 - STS366UP61
The STS366UP61 delivers a 600 A amperage rating with a three-pole configuration to handle large motor feeders and main disconnect applications. This capability improves fault isolation and reduces miscoordination in demanding switchgear environments. A 24 Vdc coil enables seamless remote tripping from PLCs and motor-control centers, providing faster response times and easier integration into plant safety interlocks. The NEMA 4 enclosure and painted steel construction offer weather and dust resistance, making it suitable for outdoor installations and dusty manufacturing floors, with compatibility across standard MCC panels to simplify retrofits. Non-Fusible protection reduces maintenance by eliminating fuse replacements, supporting shorter downtimes and simpler spare-part management. Auxiliary contacts 1 NO-1 NC enable alarm signaling and status monitoring, aiding safety compliance and remote diagnostics. The compact footprint—12.43 in depth, 62.97 in height, 28.29 in width, and 140 lb weight—facilitates panel planning and shipping logistics while meeting rigorous certification requirements.
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FAQs
STS366UP61 is a three-pole, non-fusible unit with a 24 Vdc coil and 1 NO-1 NC auxiliary contact, designed for standard MCC panels and control wiring. It supports remote tripping from PLCs and safety interlocks, with a NEMA 4 enclosure suitable for dusty or wet environments. The compact footprint facilitates retrofits into existing switchgear without major enclosure modifications.
Key ratings include 600 A amperage, 600 Vac and 250 Vdc voltage ratings, and a 24 Vdc coil. It is non-fusible, providing clear isolation without fuse changes, and offers a 1 NO-1 NC auxiliary contact for signaling. These specs support reliable remote tripping and integration into standard electrical protection schemes in industrial panels.
This device excels in motor control centers (MCCs), large process panels, and outdoor or dusty manufacturing environments. Its three-pole design, robust enclosure, and remote-tripping capability make it ideal for safety interlock systems, equipment isolation during faults, and installation in facilities requiring dependable electrical protection with easy integration into existing control architectures.
STS366UP61 carries UL Listed and cUL Certified markings, ensuring compliance with North American electrical installation standards. The NEMA 4 painted steel enclosure also supports reliable performance in challenging environments, aligning with industry safety and reliability expectations for industrial protection devices.
By enabling rapid remote tripping and eliminating fuse-related maintenance, STS366UP61 reduces maintenance frequency and downtime. The auxiliary alarm contact enhances monitoring and early fault detection, supporting proactive maintenance and faster root-cause analysis, which translates to improved equipment uptime and overall return on investment for large-panel installations.