Eaton STS366NP61 Shunt Trip Safety Switch - cUL/UL Listed
Part Number: STS366NP61
Quick Summary
The Eaton STS366NP61 shunt trip safety switch provides automated shutdown for three-pole switchgear up to 600 A and 600 Vac. In fast-moving industrial environments, wiring complexity and interlock reliability are common pain points that slow commissioning and increase safety risk. This unit integrates a 24 Vdc coil, an alarm switch, and 1 NO-1 NC contacts with a rugged NEMA 4 painted steel enclosure, helping you meet control-safety requirements with less wiring and fewer failure points. It carries cUL Certified and UL Listed approvals and is built for harsh environments, ensuring long service life in plant installations. By combining remote-tripping capability with robust protection and clear diagnostics, it accelerates deployment, reduces maintenance costs, and improves overall panel reliability.
Product Information
Extended Description
STS366NP61 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, Fusible, 600 V
Product Name
Eaton shunt trip safety switch
Catalog Number
STS366NP61
UPC
786685829098
Product Length/Depth
12.43 in
Product Height
62.97 in
Product Width
28.29 in
Product Weight
149 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 4
Enclosure material
Painted steel
Number Of Poles
Three-pole
Type
Shunt trip safety switch
Amperage Rating
600A
Coil voltage
24 Vdc
Protection
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 - STS366NP61
Feature → Business Impact → Application. The STS366NP61 delivers a 600 A amperage rating with a 24 Vdc coil, 1 NO-1 NC contact set, and fusible protection. Business impact: enables reliable remote tripping of heavy-duty circuits while reducing arc-flash exposure and shutdown risk. Application: ideal for industrial switchgear, motor control centers, and control panels in demanding automation environments. Feature → Business Impact → Application. The NEMA 4 painted steel enclosure provides weather-resistant, dust-tight protection, allowing indoor and rugged outdoor installation with minimal enclosure modifications. Business impact: enhances system reliability in dirty, wet, or wash-down environments. Application: suitable for plant-floor switchgear and outdoor control cabinets. Feature → Business Impact → Application. The three-pole design with an integrated alarm switch simplifies interlock wiring and status signaling, reducing panel complexity and maintenance communications. Business impact: faster installation, easier diagnostics, and clearer fault indication. Application: critical safety interlocks in process lines and packaging automation. Feature → Business Impact → Application. Certifications and warranty support include cUL Certified and UL Listed status, a one-year warranty (or 18 months from shipment) per Eaton policy, and compatibility with 600 Vac / 250 Vdc loads. Business impact: demonstrates regulatory compliance, predictable maintenance planning, and long-term serviceability. Application: essential for regulated industries and facility-wide safety upgrades.
Get a Quick Quote for a Eaton STS366NP61
Chat with us on WhatsApp - fast responses guaranteed
Need to speak with someone? We'll call you back within 2 hours during business hours
Interested in Eaton STS366NP61?
Enquire Now
FAQs
STS366NP61 is designed as a three-pole shunt trip safety switch with a 24 Vdc coil and 1 NO-1 NC configuration, suitable for integration into typical 3-pole switchgear and motor control assemblies. Its NEMA 4 enclosure supports indoor or wash-down environments, while the 600 A rating ensures compatibility with high-current trunk feeds. Plan for remote signaling wiring and ensure control circuits are rated for 24 Vdc coil activation and 600 Vac control power.
Key specs include a 600 A amperage rating, 24 Vdc coil voltage, and a voltage rating of 600 Vac / 250 Vdc. The contact configuration is 1 NO-1 NC, with fusible protection. The device also provides an alarm switch output and is suitable for use in environments requiring UL/cUL certification. Confirm panel clearance for a 12.43 in depth, and ensure your control circuits support remote tripping signals.
Yes. The unit uses a NEMA 4 painted steel enclosure, designed to resist dust, water, and demanding wash-down conditions typical in industrial settings. This makes it suitable for both indoor control panels and rugged outdoor applications where environmental protection is required, helping to maintain reliability and reduce maintenance frequency in harsh environments.
The STS366NP61 carries cUL Certified and UL Listed certifications, confirming compliance with recognized safety and performance standards. These certifications facilitate regulatory approvals, enable easier integration into regulated facilities, and support safer operation across industrial automation environments, reducing the risk of non-compliance penalties and operational downtime.
Eaton provides a warranty policy (25-000) offering one year from installation or eighteen months from shipment, whichever occurs first. For maintenance, rely on the integrated alarm signaling to monitor status, and schedule periodic testing of remote-tripping functionality and coil drive. Document the catalog number STS366NP61, UPC 786685829098, and ensure spare parts for the 24 Vdc coil and 600 A contact assembly are stocked to minimize downtime.