Eaton STS366UD3N Shunt Trip Safety Switch - UL Listed
Part Number: STS366UD3N
Quick Summary
Shunt trip safety switch rapidly de-energizes circuits in safety-critical motor control panels. Engineers often wrestle with wiring complexity and nuisance trips, and this Eaton STS366UD3N simplifies integration with a factory-installed neutral for non-fused operation. UL Listed and cUL Certified, it features NEMA 12 and NEMA 3R enclosures for rugged protection in a variety of indoor and outdoor environments. With a 600 A rating, 120 VAC coil, and 600 VAC / 250 VDC voltage tolerance, it delivers robust protection while reducing panel size and wiring effort. Designed for reliability, this solution supports regulatory compliance and helps shorten commissioning and maintenance cycles, delivering improved uptime and safety for industrial facilities.
Product Information
Extended Description
STS366UD3N Eaton: Eaton shunt trip safety switch, Factory-installed neutral for non-fused switch, Shunt trip safety switch, 600 A, Three-pole, 600 Vac, 250 Vdc, 120 Vac, NEMA 12, NEMA 3R, Non-Fusible, 600 V
Product Name
Eaton shunt trip safety switch
Catalog Number
STS366UD3N
UPC
786685925448
Product Length/Depth
12.43 in
Product Height
62.97 in
Product Width
28.29 in
Product Weight
140 lb
Certifications
Contact Manufacturer UL Listed cUL Certified
Enclosure
NEMA 12, NEMA 3R
Number Of Poles
Three-pole
Type
Shunt trip safety switch
Amperage Rating
600A
Coil voltage
120 Vac
Protection
Non-Fusible
Voltage rating
600 Vac, 250 Vdc
Special features
Factory-installed neutral for non-fused switch
Feature: Three-pole, 600 A non-fusible design. Business Impact: Provides robust current protection for demanding loads, reducing fuse changes and improving crew safety. Application: Ideal for motor control centers and high‑demand industrial panels. Feature: Coil voltage of 120 VAC. Business Impact: Enables straightforward integration with standard control circuitry and widely available power sources, minimizing control wiring costs. Application: Control circuits in typical plant automation environments. Feature: Factory-installed neutral for non-fused switch. Business Impact: Simplifies wiring and reduces accessory components, shortening panel assembly time and improving reliability. Application: Non-fused configurations in protective switch gear. Feature: Enclosures rated NEMA 12 and NEMA 3R. Business Impact: Extends protection to dusty, damp, and outdoor environments, enabling flexible installation options. Application: Indoor and outdoor industrial installations. Feature: Ratings of 600 VAC and 250 VDC with 600 A capacity. Business Impact: Supports versatile power protection across mixed AC and DC systems, ensuring consistent performance in high‑energy applications. Application: Industrial equipment and control circuits requiring multi‑voltage protection. Feature: Certifications UL Listed and cUL Certified. Business Impact: Facilitates procurement and regulatory compliance, reducing qualification time for safety approvals. Application: Compliance-driven panel buildouts and safety audits.
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FAQs
The STS366UD3N uses a 120 VAC coil, which matches common control circuits and simplifies integration with standard plant controls.
Yes. The unit is UL Listed and cUL Certified, providing regulatory compliance and acceptance across North American electrical installations.
The STS366UD3N is designed for NEMA 12 and NEMA 3R enclosures, offering indoor dust protection and outdoor or semi-outdoor moisture protection as required by the application.
It is rated for 600 A and supports 600 VAC and 250 VDC, making it suitable for high-current, mixed-voltage protection in industrial panels.
Factory-installed neutral for non-fused operation reduces wiring complexity, shortens assembly time, and improves system reliability in non-fused configurations.