Eaton STS367NW31 Shunt Trip Safety Switch - UL Listed
Part Number: STS367NW31
Quick Summary
The Eaton shunt trip safety switch STS367NW31 provides rapid automatic isolation for industrial power systems. A wrong or delayed trip can mean costly downtime and safety noncompliance for critical equipment. This unit carries cUL Certified and UL Listed approvals and offers a rugged NEMA 4X stainless steel enclosure for harsh environments. With 800 A protection, 600 Vac / 250 Vdc ratings, and a 120 Vac coil, it scales from standard to demanding industrial tasks. Designed for reliable protection in switchgear and motor control centers, it helps reduce maintenance costs and improve uptime.
Product Information
Extended Description
STS367NW31 Eaton: Eaton shunt trip safety switch, 800 A, Three-pole, 600 Vac, 250 Vdc, Alarm switch, 120 Vac, 1 NO 1 NC, NEMA 4X, 304 stainless steel, Fusible, 600 V
Product Name
Eaton shunt trip safety switch
Catalog Number
STS367NW31
UPC
786685829975
Product Length/Depth
12.43 in
Product Height
71.72 in
Product Width
29.54 in
Product Weight
170 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 4X
Enclosure material
304 stainless steel
Number Of Poles
Three-pole
Type
Shunt trip safety switch
Amperage Rating
800A
Coil voltage
120 Vac
Protection
Fusible
Voltage rating
600 Vac, 250 Vdc
Contact configuration
1 NO 1 NC
Switching Devices Flex Center
Switching Devices Flex Center
Switching Devices Flex Center
Eaton Specification Sheet - STS367NW31
Feature: 800 A amperage rating with fusible protection → Business Impact: Enables reliable high-load circuit protection while enabling selective coordination to minimize outage impact in critical systems → Application: Large switchgear and motor control centers in manufacturing facilities benefit from reduced fault energy and faster safe shutdowns, supporting compliance with industrial safety standards. Feature: Three-pole configuration with 1 NO 1 NC contacts → Business Impact: Ensures robust three-phase protection and flexible signaling for remote alarm integration → Application: Three-phase drives and MCCs require dependable trip schemes to prevent arc flash hazards and equipment damage. Feature: Voltage ratings of 600 Vac / 250 Vdc and coil voltage of 120 Vac → Business Impact: Broad compatibility across legacy and modern control architectures, simplifying procurement and wiring practices → Application: Power distribution networks in automotive, metalworking, and process industries benefit from streamlined integration and fewer configuration errors. Feature: NEMA 4X enclosure with 304 stainless steel → Business Impact: Superior corrosion resistance and washdown suitability, lowering maintenance costs and downtime → Application: Outdoor and harsh-production environments, including chemical processing and food & beverage facilities, gain durable protection. Feature: Certifications and regulatory alignment (cUL Certified, UL Listed) → Business Impact: Reduces compliance risk and auditing time, improving project approval cycles → Application: Utilities, data centers, and regulated manufacturing environments achieve faster safety qualification. Feature: Documentation and warranty support (Eaton policy) → Business Impact: Clear coverage and engineering guidance shorten troubleshooting and downtime during commissioning → Application: Procurement teams gain confidence in long-term serviceability for critical safety devices.
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FAQs
STS367NW31 is a three-pole shunt trip device rated for 800 A with a 120 Vac coil, 600 Vac / 250 Vdc main ratings, and 1 NO 1 NC contacts. Its NEMA 4X enclosure and 304 stainless steel construction ensure reliable operation in switchgear and motor control centers, while its fusible protection supports selective coordination and safer shutdown sequences.
Plan for a three-pole, high-current mounting within a NEMA 4X enclosure. Account for the unit’s 12.43 in length, 71.72 in height, and 29.54 in width, along with its 170 lb weight. Ensure proper wiring for 600 Vac/250 Vdc main circuits and 120 Vac control circuits, with space for wiring access and maintenance clearance.
The STS367NW31 carries cUL Certified and UL Listed certifications, confirming compliance with recognized electrical safety standards. These approvals help streamline regulatory audits, facilitate project approvals, and reduce risk when specifying safety interlocks for industrial equipment and control panels.
Ideal for switchgear, motor control centers, and emergency shutdown circuits in harsh environments. The 800 A rating supports high-current protection, while the NEMA 4X enclosure provides resistance to corrosion and washdown exposure, making it suitable for process industries, metalworking, and outdoor installations.
Eaton provides a one-year warranty from installation or eighteen months from shipment, whichever occurs first. This coverage, along with Eaton’s technical support and documentation, helps ensure rapid commissioning, efficient maintenance, and long-term reliability for critical safety devices in plant environments.