Eaton STS366ND6 Shunt Trip Safety Switch - UL Listed
Part Number: STS366ND6
Quick Summary
Eaton STS366ND6 shunt trip safety switch provides rapid, controlled de-energization for industrial motor control centers. Manufacturers and maintenance teams struggle with unexpected downtime when protective devices trip slowly or fail during faults. This model carries UL Listed and cUL Certified marks and uses a rugged NEMA 12/3R enclosure to withstand dust, moisture, and demanding factory environments. With a 600 A rating and a 24 Vdc coil, it integrates seamlessly into protective schemes, helping reduce wiring complexity and unplanned outages. In addition, the enclosed design supports easy replacement and compliant wiring practices. This combination delivers dependable safety, faster fault isolation, and measurable uptime improvements for high-demand electrical systems.
Product Information
Extended Description
STS366ND6 Eaton: Eaton Shunt trip safety switch, 600 A, Coil V: 24 Vdc, NEMA 12/3R, 600 V, Three-pole, Fusible with neutral
Product Name
Eaton shunt trip safety switch
Catalog Number
STS366ND6
UPC
786685828992
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
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
Switching Devices Flex Center
Switching Devices Flex Center
Switching Devices Flex Center
Eaton Specification Sheet - STS366ND6
Feature: The STS366ND6 delivers a 600 A amperage rating for main feeders and motor control centers, allowing a single protective device to handle large loads without upsizing upstream gear. Business impact: reduces capital expenditure on protective devices, streamlines protection coordination, and minimizes changes required during upgrades. Application: ideal for heavy-duty industrial panels and process lines where motors and heaters demand reliable, instantaneous disconnection under fault conditions. Feature: A 24 Vdc coil integrates with common low-voltage control circuits, enabling direct interfacing with PLCs and safety relays. Business impact: lowers wiring complexity, shortens commissioning time, and improves fault-signal responsiveness, contributing to safer startup sequences. Application: widely used in machine control cabinets, MCCs, and distributed control architectures across manufacturing and packaging environments. Feature: The rugged NEMA 12/3R enclosure protects the device from dust, moisture, and incidental damage in typical factory settings. Business impact: extends service life, reduces preventive maintenance, and preserves trip performance in environments with splashing water or dusty floors. Application: suitable for indoor plant rooms, equipment rooms, and outdoor-enclosure installations where weather exposure is possible. Feature: Three-pole design with fusible neutral offers complete, coordinated interrupting of all three phases with a neutral path when required. Business impact: improves safety margins, simplifies wiring schemes in switchgear, and minimizes risk of arc faults during switching. Application: motor feeders and HVAC drives in food and beverage plants, metals processing, and automotive assembly lines. Feature: UL Listed and cUL Certified construction backed by Eaton’s warranty policy provides regulatory confidence and predictable service. Business impact: helps with procurement and compliance documentation, reduces vendor risk, and supports maintenance planning with one-year warranty from installation or eighteen months from shipment. Application: preferred choice for compliant, long-life protection in critical industrial applications.
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FAQs
Install the STS366ND6 in a suitable enclosure following Eaton installation guidelines. Mount securely in a panel space designed for a three-pole device, and wire the 24 Vdc coil and line/load connections per the datasheet. The NEMA 12/3R enclosure supports dusty or damp environments, helping ensure reliable fault isolation with proper panel sealing and wiring practices.
The device is rated for 600 A, with voltage ratings of 600 Vac and 250 Vdc. It features a 24 Vdc coil, a three-pole configuration, and fusible with neutral protection, all housed in a NEMA 12/3R enclosure suitable for industrial environments.
Yes. Its three-pole shunt trip design with fusible neutral protection is well suited for MCCs and protection panels that require fast, reliable disconnection of large loads, helping maintain safe startup and operation in manufacturing environments.
The unit is UL Listed and cUL Certified, providing compliance assurance with recognized safety and performance standards for industrial control equipment.
Warranty follows Eaton Selling Policy 25-000: one year from installation or eighteen months from shipment, whichever occurs first, covering manufacturing defects and performance reliability.