Eaton STS366ND61 Shunt Trip Safety Switch - UL Listed
Part Number: STS366ND61
Quick Summary
The Eaton STS366ND61 Shunt Trip Safety Switch enables rapid overcurrent isolation in motor control panels. A common pain point is nuisance trips and slow fault isolation that disrupt production and inflate maintenance costs. UL Listed and cUL Certified markings ensure regulatory compliance in North American installations, while the rugged NEMA 12/3R enclosure withstands dusty or damp environments. With a 600 A rating, a 24 Vdc coil, three-pole design, and a 1NO-1NC alarm contact, it integrates neatly into existing protection schemes and supports safer, more reliable operations for industrial automation and electrical protection needs.
Product Information
Extended Description
STS366ND61 Eaton: Eaton Shunt trip safety switch, 600 A, 1NO/1NC alarm switch only, Coil V: 24 Vdc, NEMA 12/3R, 600 V, Three-pole, Fusible with neutral
Product Name
Eaton shunt trip safety switch
Catalog Number
STS366ND61
UPC
786685829005
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
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
Fusible
Voltage rating
600 Vac, 250 Vdc
Contact configuration
1 NO-1 NC
Double Up on Safety
Double Up on Safety
Double Up on Safety
Eaton Specification Sheet - STS366ND61
Selling Policy 25-000 - Distribution and Control Products and Services
Feature: 600 A amperage rating → Business Impact: Enables high-current interrupt capability, reducing arc flash risk and protecting feeders from sustained faults. Application: Motor feeders and large panel assemblies benefit from reliable, full-load interruption. Feature: 24 Vdc coil → Business Impact: Low control power requirements simplify integration with standard control circuits and PLC outputs. Application: Control circuits in machine-builds and control panels. Feature: 1NO-1NC alarm switch → Business Impact: Alarm state available to integrate with remote monitoring and safety interlocks, improving situational awareness. Application: Safety interlock logic and control room signaling. Feature: NEMA 12/3R enclosure → Business Impact: Enhanced protection against dust, moisture, and outdoor exposure, reducing device downtime. Application: Indoor and protected outdoor installations. Feature: Three-pole design → Business Impact: Ensures complete circuit interruption across all phases, improving overall safety and fault isolation. Application: Three-phase motor control circuits. Feature: 600 Vac, 250 Vdc voltage rating → Business Impact: Broad compatibility with AC and DC systems without requiring multiple devices. Application: Plant-wide protection schemes. Feature: Fusible protection and neutral join → Business Impact: Adds protective coordination and safe shutdown paths, lowering risk of uncontrolled faults. Application: Systems with neutral grounding and fusible protections. Certification/Compliance: UL Listed and cUL Certified → Business Impact: Accelerates regulatory approvals and reduces commissioning delays. Application: North American industrial environments seeking compliant safety interlocks.
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FAQs
Yes. The STS366ND61 features a 24 Vdc coil and a three-pole design suitable for standard Eaton control circuits and motor protection schemes. It is designed for straightforward panel integration, with an ANSI-compliant 1NO-1NC alarm contact to facilitate signaling to safety interlocks and PLCs.
The device offers a 600 A amperage rating, 24 Vdc coil voltage, and a voltage rating of 600 Vac / 250 Vdc. It is a three-pole shunt trip safety switch with a 1NO-1NC alarm configuration, suitable for fusible protection with a neutral and a NEMA 12/3R enclosure.
Ideal for motor control centers, machine safety interlocks, and large electrical panels requiring rapid shutoff. Its rugged enclosure and high current capability support demanding industrial environments, while the alarm contact provides signaling for centralized safety monitoring and prompt fault response.
The STS366ND61 is UL Listed and cUL Certified, ensuring North American regulatory compliance for electrical protection devices. These certifications simplify commissioning, support safety standards conformance, and help meet corporate procurement and risk management requirements.
By delivering reliable, rapid isolation at high currents and providing a clear alarm signal for fault conditions, the device minimizes unplanned downtime and enhances predictive maintenance planning. Its NEMA 12/3R enclosure protects against contaminants, reducing repair frequency and extending service life in harsh environments.