Eaton STS368FW33 Shunt Trip Safety Switch - NEMA 4X UL Listed
Part Number: STS368FW33
Quick Summary
STS368FW33 Shunt Trip Safety Switch provides fast electrical isolation for industrial equipment. It helps engineers reduce downtime and improve personnel safety by enabling immediate shutdown during faults or maintenance windows. With UL Listed and cUL Certified markings and a rugged NEMA 4X enclosure, the unit is suitable for harsh environments and outdoor installations. Its three-pole design and fusible protection support reliable circuit control across large motor loads, while 600 Vac / 250 Vdc ratings accommodate diverse systems. By combining rugged construction with straightforward integration, it delivers predictable performance, simplifying commissioning and ongoing maintenance. For applications in manufacturing, mining, and critical process facilities, this switch delivers safety, compliance, and operational efficiency, aligning with reliability goals and lifecycle cost reduction.
Product Information
Extended Description
STS368FW33 Eaton: Eaton Heavy Duty Shunt Trip Safety Switch, 1200 A, 600 Vac, 250 Vdc, Three- pole, NEMA 4X, Fusible
Product Name
Eaton Heavy Duty Shunt Trip Safety Switch
Catalog Number
STS368FW33
UPC
786689314255
Product Length/Depth
23.15 in
Product Height
72.5 in
Product Width
47.23 in
Product Weight
405 lb
Certifications
UL Listed cUL Certified
Enclosure
NEMA 4X
Number Of Poles
Three-pole
Amperage Rating
1200A
Coil voltage
120 Vac
Protection
Fusible
Voltage rating
600 Vac, 250 Vdc
Commercial Distribution, Switching Devices, Volume 2, Tab 1
ARMS Enclosed Circuit Breaker
ARMS Enclosed Circuit Breaker
ARMS Enclosed Circuit Breaker
Eaton Specification Sheet - STS368FW33
Three-pole design with fusible protection enables reliable disconnect of large motor circuits, reducing outage duration and arc flash exposure. This translates to measurable uptime gains on heavy-duty conveyors and pumps, where unexpected trips stall production. In practice, this means quicker fault isolation and safer maintenance windows in process plants. Coil voltage of 120 Vac ensures dependable actuation from standard control circuits, simplifying integration into existing panels, reducing wiring errors, and lowering commissioning time. NEMA 4X enclosure provides weather-resistant protection for indoor and outdoor installations, minimizing environmental-related faults and expanding installation options across facilities like data centers and outdoor substations. Broad voltage ratings of 600 Vac and 250 Vdc accommodate mixed-power systems, simplifying device selection in multi-voltage plants and improving protection coordination with upstream devices. UL Listed and cUL Certified marks offer regulatory confidence for compliance-heavy environments, while the heavy-duty three-pole construction and rugged enclosure support safe, reliable switching of large loads. The physical footprint—23.15 in L, 72.5 in H, 47.23 in W—and a 405 lb weight reflect its robust design, enabling straightforward wiring and serviceability and contributing to lower lifecycle costs in retrofit projects.
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FAQs
Install STS368FW33 by wiring the control coil to a 120 Vac control circuit and connecting the three poles to the incoming line and load as per the panel’s layout. Verify the 600 Vac / 250 Vdc ratings match your system and use fusible protection as specified. Mount the unit in a suitable NEMA 4X enclosure to ensure environmental protection and regulatory compliance.
The device is rated for 1200A with a three-pole configuration, 120 Vac coil voltage, and a voltage rating of 600 Vac / 250 Vdc, with fusible protection. These specs enable reliable control of large motor loads, provide fast isolation, and support coordination with upstream protection devices to minimize fault impact and downtime.
Yes. The NEMA 4X enclosure delivers weather, corrosion, and dust resistance, making it suitable for outdoor installations, harsh industrial environments, and locations with contamination or moisture. This reduces environmental-related faults and extends service life in outdoor substations, mining sites, and processing plants.
STS368FW33 carries UL Listed and cUL Certified marks, indicating conformance to recognized safety standards across North America. These certifications simplify regulatory approvals, support safe operation of high-current switching in regulated environments, and facilitate procurement in industries with strict safety and quality requirements.
The rugged, high-current design with a NEMA 4X enclosure reduces maintenance surprises and downtime, delivering predictable protection performance over the lifecycle. Its compatibility with standard control circuits and straightforward wiring also shortens commissioning and retrofit time, contributing to lower lifecycle costs and faster return on investment for heavy-duty equipment installations.