Eaton STS366UP64 Shunt Trip Safety Switch - UL Listed
Part Number: STS366UP64
Quick Summary
Eaton STS366UP64 shunt trip safety switch provides rapid, reliable circuit protection for large industrial power panels and switchgear. Engineers often struggle with nuisance trips and uneven control coordination; this device delivers precise 24 Vdc coil actuation and a clear alarm output to minimize downtime. UL Listed, cUL Certified, and housed in a NEMA 4, painted steel enclosure, it stands up to demanding environments while delivering robust protection. With its three-pole design and non-fusible protection, it supports safe, compliant isolation in critical electrical systems. This model also aligns with common control architectures, offering straightforward installation and reliable performance within industrial protection and control ecosystems.
Product Information
Extended Description
STS366UP64 Eaton: Eaton shunt trip safety switch, 600 A, Three-pole, 600 Vac, 250 Vdc, Alarm switch, 24 Vdc, 1 NO 1 NC, NEMA 4, Painted steel, Non-Fusible, 600 V
Product Name
Eaton shunt trip safety switch
Catalog Number
STS366UP64
UPC
786685829371
Product Length/Depth
12.43 in
Product Height
62.97 in
Product Width
28.29 in
Product Weight
140 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 Vdc
Protection
Non-Fusible
Voltage rating
600 Vac, 250 Vdc
Contact configuration
1 NO 1 NC
Feature 600 A amperage rating → Business Impact: Supports high-current protection for large MCCs and main feeders, reducing fuse and breaker wear while improving reliability; Application: Motor control centers and distribution panels. Feature 3-pole design with 600 Vac / 250 Vdc rating → Business Impact: Enables safe, multi-line isolation across complex circuits; Application: Industrial switchgear installations requiring robust multi-pole protection. Feature 24 Vdc coil → Business Impact: Compatible with standard control circuits and safety interlocks, simplifying wiring and control integration; Application: Plant safety interlock systems and centralized control schemes. Feature 1 NO 1 NC auxiliary contact (alarm switch) → Business Impact: Improves fault signaling and remote diagnostics, aiding maintenance planning and incident response; Application: Alarm and interlock signaling in panel assemblies. Feature NEMA 4 enclosure with painted steel → Business Impact: Delivers weather/dust resistance for indoor/outdoor installations, reducing enclosure-related maintenance; Application: Harsh environments and damp locations. Feature Non-Fusible protection → Business Impact: Easier retrofit and safer replacement workflows, minimizing downtime; Application: Retrofit projects and safety upgrades. Certifications UL Listed, cUL Certified → Business Impact: Simplifies regulatory compliance and safety verification for industrial installations; Application: Compliance-driven panel builds and code-adherent projects.
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FAQs
For proper installation, mount the STS366UP64 in a suitable enclosure (NEMA 4 rated) and ensure a secure three-pole connection. Route wiring to the 24 Vdc coil control circuit and the 1 NO 1 NC alarm/auxiliary contact. Verify clearances, torque specifications, and adherence to applicable electrical codes. The unit is designed to integrate with standard control panels and safety interlocks to minimize setup time.
STS366UP64 is rated for 600 A with a voltage rating of 600 Vac and 250 Vdc. It uses a 24 Vdc control coil and provides a 1 NO 1 NC auxiliary contact configuration (alarm switch). This combination supports dependable isolation and signaling in typical industrial control circuits.
Yes. The three-pole, non-fusible design with 600 A capacity makes it suitable for motor control centers and panel protection where rapid isolation is required. Its NEMA 4 enclosure and alarm output support robust installation in harsh environments, while the 24 Vdc coil integrates with common control logic and safety interlocks.
STS366UP64 carries UL Listed and cUL Certified markings, indicating compliance with recognized safety standards for electrical equipment. These certifications simplify procurement for regulated facilities, facilitate code compliance in regions adopting UL/cUL requirements, and support trusted performance in industrial protection and control applications.
Eaton provides a warranty aligned with their policy 25-000: one year from the date of installation or eighteen months from the date of shipment, whichever occurs first. This warranty covers manufacturing defects and supports timely technical assistance, ensuring reliability in critical protection systems for industrial panels.