Eaton STS366FW11 Shunt Trip Safety Switch - UL Listed
Part Number: STS366FW11
Quick Summary
Eaton shunt trip safety switch provides rapid power shutdown for motor control and safety enclosures. In practice, failed or slow tripping leads to unexpected downtime, costly repairs, and safety compromises. It carries cUL Certified and UL Listed approvals, a NEMA 4X enclosure, and 304 stainless steel construction to withstand harsh washdown and corrosive environments. With a 600 A rating and a 24 Vac coil, this shunt trip switch integrates reliably into industrial control circuits, delivering fast, proven protection while supporting compliance and long-term maintenance planning. This makes it a strong fit for large motor control centers, packaging lines, and process plants seeking safer, more efficient shutdowns.
Product Information
Extended Description
STS366FW11 Eaton: Eaton shunt trip safety switch, 600 A, Three-pole, 600 Vac, 250 Vdc, Alarm switch, 24 Vac, 1 NO-1 NC, NEMA 4X, 304 stainless steel, Fusible, 600 V
Product Name
Eaton shunt trip safety switch
Catalog Number
STS366FW11
UPC
786685828848
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
cUL Certified UL Listed
Auxiliary contacts
Alarm switch
Enclosure
NEMA 4X
Enclosure material
304 stainless 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: Three-pole design provides robust fault isolation and coordinated protection across multi-line circuits. Benefit: Improves system reliability by ensuring complete disconnection during a fault, reducing arc flash risk and equipment damage. Application: Suitable for large MCCs and process lines where dependable tripping is critical. Feature: 600 A amperage rating with 600 Vac / 250 Vdc voltage ratings. Benefit: Supports heavy loads and universal AC/DC applications, enabling single-point upgrades. Application: Industrial drives, conveyors, and heavy machinery where high-line current control is needed. Feature: 24 Vac coil voltage for control signal compatibility. Benefit: simplifies integration with existing control cabinets and PLC interfaces, lowering installation time and wiring cost. Application: Control room signaling and remote trip circuits. Feature: NEMA 4X enclosure with 304 stainless steel. Benefit: Delivers superior corrosion resistance and washdown durability, reducing maintenance in harsh environments. Application: Food & beverage, chemical, and outdoor installations. Feature: Auxiliary alarm switch (1 NO-1 NC). Benefit: Enables remote status feedback to SCADA and maintenance teams, improving visibility and response times. Application: Plant floor monitoring and safety interlocks. Feature: Fusible protection and clear voltage ratings (600 Vac, 250 Vdc). Benefit: Enables safe fault clearance coordination and easier system integration with protective devices. Application: Industrial power distribution and safety schemes. Feature: Certification and warranty depth (cUL, UL Listed; 1-year warranty or 18 months from shipment). Benefit: Ensures regulatory compliance and predictable maintenance costs, with a defined coverage period. Application: OEM integrations and long-term facility upgrades.
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FAQs
STS366FW11 is designed for three-pole, shunt-trip operation in industrial MCCs and safety enclosures. It accepts up to 600 A and is compatible with 600 Vac and 250 Vdc circuits, with a 24 Vac coil for control wiring. The device integrates with standard control panels and PLC signaling, enabling straightforward retrofit projects.
The shunt trip switch is housed in a NEMA 4X enclosure made from 304 stainless steel, delivering excellent corrosion resistance and washdown durability. This construction supports installations in food and beverage, chemical processing, and outdoor facilities, reducing maintenance frequency and extending service life in harsh conditions.
STS366FW11 holds cUL Certified and UL Listed approvals, reflecting compliance with key safety and performance standards. The rugged stainless-steel enclosure and sealed construction further support regulatory acceptance, making it suitable for regulated industrial environments and helping to simplify audits and safety program documentation.
With a 600 A amperage rating and 600 Vac / 250 Vdc voltage ratings, alongside a 24 Vac coil, the STS366FW11 supports high-current, dual-voltage control schemes. This enables seamless integration with existing plant power distribution and control architectures, reducing the need for alternative protection devices and simplifying control-panel wiring and interlock logic.
The device’s rugged enclosure, high current capacity, and proven actuation reduce unplanned downtime and maintenance demands. UL/cUL certifications help meet compliance costs, and warranty provisions offer financial protection during the initial installation period. Over time, reliable protection translates to lower maintenance costs, extended equipment life, and improved plant productivity.