Eaton STS367UW34 Shunt Trip Safety Switch - NEMA 4X
Part Number: STS367UW34
Quick Summary
The Eaton STS367UW34 shunt trip safety switch provides reliable fault protection for motor control centers. In fast-paced plants, nuisance trips and unclear fault signals waste time and trigger unplanned downtime. UL Listed, cUL Certified, and a NEMA 4X enclosure with 304 stainless steel construction ensure compliant, rugged performance in harsh or washdown environments. With an 800 A rating, 120 Vac coil, and 1 NO 1 NC auxiliary contacts, it integrates easily with existing protection schemes. This model supports electrical protection, switchgear reliability, and industrial automation workflows, delivering safer, more productive operations.
Product Information
Extended Description
STS367UW34 Eaton: Eaton shunt trip safety switch, 800 A, Three-pole, 600 Vac, 250 Vdc, Alarm switch, Auxiliary contact, 120 Vac, 1 NO 1 NC, NEMA 4X, 304 stainless steel, Non-Fusible, 600 V
Product Name
Eaton shunt trip safety switch
Catalog Number
STS367UW34
UPC
786685830254
Product Length/Depth
12.43 in
Product Height
71.72 in
Product Width
29.54 in
Product Weight
158 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
Auxiliary contacts
Auxiliary contact
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
Non-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 - STS367UW34
Feature: 800 A amperage rating with a 120 Vac coil enables rapid disconnection of large loads without sacrificing coordination with upstream protective devices. Business Impact: reduces arc-flash exposure, minimizes equipment damage, and shortens downtime during fault events. Application: ideal for motor control centers, heavy feeders, and high-current switchgear installations. Feature: Three-pole, non-fusible design with voltage ratings of 600 Vac and 250 Vdc ensures robust protection across AC and DC segments. Business Impact: enhances system reliability and simplifies protective coordination in complex electrical distributions. Application: suitable for industrial power distribution and data-center UPS facilities. Feature: Auxiliary signaling with a 1 NO 1 NC configuration and an integrated alarm switch. Business Impact: enables remote fault signaling and interlock integration with PLCs and SCADA, improving diagnostics and response times. Application: critical process lines, packaging, and conveyor systems. Feature: NEMA 4X enclosure and 304 stainless steel construction deliver corrosion and washdown resistance. Business Impact: lowers maintenance costs and extends service life in humid, chemical, or sanitary environments. Application: food & beverage, water/wastewater, and pharmaceutical facilities. Feature: UL Listed and cUL Certified with broad voltage and current ratings. Business Impact: accelerates regulatory approvals and vendor qualification, reducing installation risk. Application: compliant protection across industrial automation and switchgear projects. Feature: Comprehensive protection footprint including 600 Vac, 250 Vdc, and a non-fusible design supports long-term lifecycle cost reductions. Business Impact: minimizes spare parts and enhances uptime. Application: large-scale MCCs, OEM equipment, and industrial control systems.
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FAQs
To install the STS367UW34, verify the three-pole, non-fusible configuration matches your switchgear, confirm a 120 Vac coil supply, and ensure wiring follows manufacturer diagrams. Use appropriate mounting hardware for a NEMA 4X enclosure and verify the auxiliary contact and alarm switch wiring for remote signaling. Proper coordination with upstream protection is essential for safe, reliable operation.
The device is rated to carry up to 800 A, with AC line ratings up to 600 Vac and DC ratings up to 250 Vdc. These ratings indicate it can safely interrupt and protect large-motor and feeder circuits. The 120 Vac coil drives the shunt trip mechanism, enabling rapid fault clearance while maintaining coordination with upstream protective schemes.
Yes. The enclosure is NEMA 4X and constructed from 304 stainless steel, which provides excellent resistance to washdowns, humidity, and corrosive exposures. This makes it well-suited for food and beverage, pharmaceutical, and water treatment facilities where both protection and sanitation are critical.
The STS367UW34 is UL Listed and cUL Certified, which facilitates compliance with North American electrical codes and supplier qualification. The NEMA 4X enclosure and stainless steel construction further support regulatory requirements in harsh environments, while the 1 NO 1 NC auxiliary contact enables integration with PLCs and safety interlocks.
With a robust 800 A rating, durable stainless-steel enclosure, and reliable tripping mechanism, the STS367UW34 reduces unexpected outages and maintenance intervals. Remote signaling through the auxiliary contact improves fault resolution, contributing to lower lifecycle costs and higher uptime in critical process and automation systems.