Eaton STS366UD6 Shunt Trip Safety Switch - UL Listed
Part Number: STS366UD6
Quick Summary
The Eaton STS366UD6 shunt trip safety switch provides rapid interruption of power to motor control centers and safety interlocks in industrial environments. This device helps prevent equipment damage and protect personnel by enabling remote trip activation under fault or safety conditions. It carries UL Listed and cUL Certified approvals and is housed in a rugged NEMA 12, NEMA 3R enclosure suitable for indoor and outdoor installations. With a 600 A rating and a 24 Vdc coil, it supports high-current controls while maintaining safe, controlled shutdown. The unit is non-fusible and designed for three-pole operation, delivering reliable protection in demanding applications and ensuring compliance with industry safety standards. For procurement teams, this translates to consistent performance, easier compliance documentation, and lower total cost of ownership through reduced downtime and safer operations.
Product Information
Extended Description
STS366UD6 Eaton: Eaton shunt trip safety switch, 600 A, Three-pole, 600 Vac, 250 Vdc, 24 Vdc, NEMA 12, NEMA 3R, Non-Fusible, 600 V
Product Name
Eaton shunt trip safety switch
Catalog Number
STS366UD6
UPC
786685829265
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
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
Feature: 600 A amperage rating paired with a 24 Vdc coil provides robust, fast remote actuation. Business impact: Ensures reliable shunt-trip performance under fault conditions, reducing fault clearance time and minimizing equipment damage. Application: Suitable for three-pole safety switch installations in MCCs and large machine controls. Feature: Three-pole, non-fusible design rated for 600 Vac and 250 Vdc. Business impact: Predictable operation supports standard protection schemes and straightforward maintenance. Application: Industrial power distribution and control panels in harsh environments. Feature: NEMA 12 and NEMA 3R enclosure. Business impact: Weather and dust protection extends service life and enables indoor or outdoor installations. Application: Industrial facilities with variable exposure conditions and remote locations. Feature: UL Listed and cUL Certified. Business impact: Compliance with recognized safety standards reduces procurement risk and audit effort. Application: Regulatory-driven projects and customer qualification processes. Feature: Physical footprint—12.43 in depth, 62.97 in height, 28.29 in width, 140 lb weight. Business impact: Clear space planning and cabinet compatibility, facilitating retrofits and new builds. Application: MCC retrofits and standard rack-based installations in existing facilities.
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FAQs
To install STS366UD6 with an MCC, mount the switch in a compatible indoor/outdoor enclosure (NEMA 12 or NEMA 3R), connect the three poles, and wire the 24 Vdc control coil to the remote trip circuit per Eaton’s guidelines. Ensure adequate space given the 12.43 in depth, and verify proper torque and enclosure access for safe operation.
STS366UD6 provides a 600 A amperage rating, with a voltage rating of 600 Vac and 250 Vdc, and a 24 Vdc coil. It is a three-pole, non-fusible device designed for robust remote trip capability in high-current industrial applications such as motor control centers and large machinery.
Yes. The three-pole configuration, 600 A rating, and 600 Vac/250 Vdc compatibility make it ideal for motor control centers. Its shunt trip function enables rapid remote shutdown, while the NEMA 12/3R enclosure supports reliable operation in typical MCC environments with dust and weather exposure considerations.
STS366UD6 is UL Listed and cUL Certified, reflecting conformity to recognized safety standards. These certifications simplify audits, supplier qualification, and compliance reporting for industrial projects and regulated installations requiring proven electrical safety performance.
The ROI comes from enhanced personnel safety, reduced downtime due to faster remote fault clearing, and easier regulatory compliance. By preventing extended outages and limiting arc flash exposure, facilities experience lower maintenance costs, fewer incident investigations, and more predictable maintenance windows in high-current environments.