Eaton STS366FP14 Shunt Trip Safety Switch - UL Listed
Part Number: STS366FP14
Quick Summary
The Eaton STS366FP14 shunt trip safety switch provides reliable remote tripping for molded case breakers in industrial control panels. This design helps reduce downtime and safety gaps when control signals fail or interlocks are misconfigured. UL Listed and cUL Certified, with a NEMA 4 painted steel enclosure, it withstands damp, dusty environments. Designed for high-current safety, 600 A switching with 24 Vac control and 600 Vac / 250 Vdc ratings supports robust, compliant installations. Its 1 NO 1 NC auxiliary contact provides alarm signaling for status monitoring and fault reporting. This combination delivers safer shutdowns, easier integration, and measurable uptime improvements across critical manufacturing lines.
Product Information
Extended Description
STS366FP14 Eaton: Eaton shunt trip safety switch, 600 A, Three-pole, 600 Vac, 250 Vdc, Alarm switch, 24 Vac, 1 NO 1 NC, NEMA 4, Painted steel, Fusible, 600 V
Product Name
Eaton shunt trip safety switch
Catalog Number
STS366FP14
UPC
786685828763
Product Length/Depth
12.43 in
Product Height
62.97 in
Product Width
28.29 in
Product Weight
145 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
Alarm switch
Enclosure
NEMA 4
Enclosure material
Painted steel
Number Of Poles
Three-pole
Type
Shunt trip safety switch
Amperage Rating
600A
Coil voltage
24 Vac
Protection
Fusible
Voltage rating
600 Vac, 250 Vdc
Contact configuration
1 NO 1 NC
Feature: 600 A amperage rating and three-pole configuration deliver robust fault protection on three-phase feeders. Business Impact: enables direct isolation of high load currents, improving safety margins and reducing the need for supplementary contactors. Application: suited to MCCs and switchgear in manufacturing environments where uptime and safety are paramount. Feature: 24 Vac coil voltage supports common control logic and PLC interfaces. Business Impact: simplifies integration with standard control circuits and minimizes control wiring complexity. Application: control cabinets and centralized safety circuits in packaging and food processing lines. Feature: 1 NO 1 NC auxiliary contact (alarm switch) provides signaling. Business Impact: allows status feedback to PLC or BMS, enabling proactive maintenance and fault notification. Application: interlock signaling in panel boards and remote alarms. Feature: NEMA 4 enclosure and painted steel construction. Business Impact: rugged performance in wet, dusty, or outdoor environments reduces corrosion risk and maintenance. Application: outdoor enclosures, washdown areas, and damp factory floors. Feature: Fusible protection and high-quality UL/cUL certification. Business Impact: ensures regulatory compliance and coordinated protection with fuses in critical circuits. Application: industrial protection in power distribution and machine safety circuits. Feature: Warranty and lifecycle support. Business Impact: reduces lifecycle risk and provides predictable procurement planning. Application: capital equipment maintenance programs for manufacturing lines.
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FAQs
When planning installation, ensure space for the 62.97 in height, 28.29 in width, and 12.43 in depth footprint. Use a three-pole configuration with a 24 Vac control circuit, and accommodate the 1 NO 1 NC auxiliary contact for signaling. Mount in a suitable panel or MCC with a NEMA 4 rated enclosure for harsh environments.
The device is rated for 600 A, with a voltage rating of 600 Vac and 250 Vdc. It operates with a 24 Vac coil and provides 1 normally open and 1 normally closed auxiliary contact for alarm signaling, making it compatible with standard control circuits and safety interlocks.
Yes. It features a NEMA 4 enclosure crafted from painted steel, designed to resist moisture, dust, and washdown while maintaining electrical integrity in industrial settings such as manufacturing floors and outdoor or damp locations.
This model is UL Listed and cUL Certified, providing recognized safety validation for North American installations and helping with regulatory compliance in industrial safety programs.
The product carries Eaton’s warranty policy: one year from installation or eighteen months from shipment, whichever occurs first, offering protection against manufacturing defects and supporting maintenance planning.