Eaton STS366NP6 Shunt Trip Safety Switch - UL Listed
Part Number: STS366NP6
Quick Summary
Eaton STS366NP6 shunt trip safety switch provides fast overcurrent protection for industrial switchgear and control panels. Many engineers struggle with delayed trips or nuisance activations when protection and control logic are not tightly coordinated. UL Listed, cUL Certified, and a rugged NEMA 4 painted steel enclosure ensure regulatory compliance and reliable performance in harsh environments. With a 600 A capacity and a three‑pole design, it supports scalable protection for feeders, MCCs, and automation cabinets while simplifying procurement. This configuration also delivers a favorable total cost of ownership thanks to a compact footprint and Eaton’s one‑year warranty policy.
Product Information
Extended Description
STS366NP6 Eaton: Eaton shunt trip safety switch, 600 A, Three pole, 600 Vac, 250 Vdc, 24 Vdc, NEMA 4, Painted steel, Fusible, 600 V
Product Name
Eaton shunt trip safety switch
Catalog Number
STS366NP6
UPC
786685829081
Product Length/Depth
12.43 in
Product Height
62.97 in
Product Width
28.29 in
Product Weight
149 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
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
Fusible
Voltage rating
600 Vac, 250 Vdc
Switching Devices Flex Center
Switching Devices Flex Center
Switching Devices Flex Center
Eaton Specification Sheet - STS366NP6
Selling Policy 25-000 - Distribution and Control Products and Services
Feature: 600 A amperage rating with a three‑pole configuration, capable of interrupting power on 600 Vac and 250 Vdc circuits. Business Impact: Enables reliable feeder protection and switchgear coordination for high‑current installations, reducing unplanned downtime and improving safety margins. Application: Suitable for motor control centers and panel boards in heavy manufacturing environments. Long-tail keywords integrated: high‑current safety switch, 600 A protection, three‑pole shunt trip, motor control panel protection. Feature: 24 Vdc coil with remote trip capability. Business Impact: Facilitates integration with PLC/SCADA interlocks and emergency shutdown schemes, improving automation reliability. Application: Industrial automation cabinets and safety interlocking circuits. Feature: NEMA 4 enclosure with painted steel construction. Business Impact: Offers weather‑resistant, dust‑tight protection for indoor and outdoor installations, lowering corrosion risk and maintenance costs. Application: Outdoor enclosures, wash‑down areas, and dusty plants. Feature: Fusible protection and robust build. Business Impact: Supports selective coordination and fault isolation, reducing arc flash exposure and maintenance expenses. Application: Systems requiring reliable fault clearing and safety compliance. Feature: Certifications and warranty. Business Impact: Accelerates procurement approvals and ensures ongoing support with Eaton’s policy and UL/cUL recognition. Application: Regulated industries seeking dependable supplier qualifications and predictable service.
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FAQs
Install STS366NP6 in panels rated for at least 600 A and sized to accommodate its 28.29 in width, 62.97 in height, and 12.43 in depth. Plan for a 149 lb unit with space for wiring, ensure the NEMA 4 enclosure is sealed against dust and moisture, and permit a 24 Vdc control coil connection for remote tripping.
UL Listed and cUL Certified indicate compliance with recognized safety standards for electrical protection equipment. For STS366NP6, these certifications confirm safe operation in bolted connections, overcurrent protection, and control‑panel integration, supporting acceptance in North American markets and simplifying customer approvals during audits and procurement.
Yes. The device supports 600 VAC and 250 VDC ratings, enabling it to interrupt power across AC main feeders and DC circuits where required. The 24 Vdc coil provides a remote trip signal, allowing integration with control systems while maintaining robust protection across mixed-voltage applications.
Typical use cases include emergency shutdowns in motor control centers, feeder protection in large panel assemblies, and safety interlocks within automated production lines. The three‑pole design ensures balanced interruption across all conductors, while the NEMA 4 enclosure supports harsh environments common in manufacturing facilities.
Eaton provides a one‑year limited warranty from installation or eighteen months from shipment, whichever occurs first. This policy, combined with UL/cUL certifications and access to Eaton specification resources, supports long‑term maintenance planning and predictable ROI for capital projects.