Eaton STS366NP1 Shunt Trip Safety Switch - UL Listed
Part Number: STS366NP1
Quick Summary
Eaton Shunt Trip Safety Switch provides fast, reliable isolation for up to 600 A circuits in industrial panels. In demanding environments, mis-trips or slow actuation can cause unplanned downtime and safety risks. UL Listed and cUL Certified support global compliance, while the NEMA 4 enclosure offers rugged weather resistance for harsh plant floors. Painted steel construction ensures long-term durability in application spaces with exposure to dust and moisture. Compatible with 24 Vac coil control and 600 Vac/250 Vdc ratings, this device fits standard switchgear architectures, enabling safer shutdown sequences and reduced maintenance costs for facilities aiming to optimize uptime and protect critical loads.
Product Information
Extended Description
STS366NP1 Eaton: Eaton Shunt trip safety switch, 600 A, Coil V: 24 Vac, NEMA 4, Painted steel, 600 V, Three-pole, Fusible with neutral
Product Name
Eaton shunt trip safety switch
Catalog Number
STS366NP1
UPC
786685829029
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
UL Listed cUL Certified
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
Feature: 600 A amperage rating provides robust circuit protection and reduces the need for multiple devices, streamlining panels and cutting installation time. Business Impact: Lower capital and maintenance costs with a single, reliable protection layer that scales with plant demand. Application: Main feeders in switchgear and motor control centers where high-current reliability is essential. Feature: 24 Vac coil voltage enables seamless integration with common control systems and PLC interfaces. Business Impact: Faster fault response and simpler wiring, reducing commissioning time and energy usage during control retries. Application: Remote control of protective schemes in automated production lines. Feature: Three-pole design ensures complete isolation of all three phases. Business Impact: Safer maintenance and reduced risk of arc flash during servicing. Application: 3-phase power distribution in industrial MCCs and switchgear assemblies. Feature: NEMA 4 painted steel enclosure delivers ingress protection against dust and water in harsh environments. Business Impact: Enhanced durability and reduced downtime for outdoor or harsh indoor locations. Application: Outdoor substations, manufacturing floors, and wet or dusty plants. Feature: Fusible with neutral configuration provides integrated protection and simplifies wiring for neutral conductor continuity. Business Impact: Consolidated protection strategy lowers part counts and speeds up installation. Application: Safety-critical feeders requiring coordinated disconnect with neutral path. Feature: 600 Vac / 250 Vdc voltage rating supports diverse AC/DC control and power architectures. Business Impact: Flexibility to support modern plant architectures without adapters. Application: Industrial equipment, switchgear, and motor control centers that require versatile ratings. Feature: UL Listed and cUL Certified guarantees compliance with global safety standards. Business Impact: Reduced vendor risk and smoother regulatory approvals for international projects. Application: Global manufacturing facilities and projects requiring formal certification traceability.
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FAQs
STS366NP1 is a three-pole, fusible with neutral device designed for 600 A circuits. Ensure mounting inside a NEMA 4 enclosure to protect against dust and moisture, and verify compatibility with a 24 Vac control coil. Plan for proper clearances, adequate wiring space, and alignment with the switchgear’s neutral path to maintain safe, reliable operation.
Key specs include a 600 A amperage rating, 24 Vac coil voltage, and voltage ratings of 600 Vac / 250 Vdc. It is a three-pole shunt trip safety switch with a fusible protection scheme, housed in a painted steel, NEMA 4 enclosure. These ratings support robust protection for industrial feeders and switchgear.
Yes. The device features a NEMA 4 enclosure and painted steel construction, designed to resist dust, water ingress, and harsher plant conditions. For outdoor or challenging indoor spaces, this enclosure helps maintain performance and longevity while enabling reliable tripping behavior when faults occur.
STS366NP1 is UL Listed and cUL Certified, confirming adherence to widely recognized safety standards. These certifications support regulatory compliance, supplier qualification, and easier acceptance in global projects, reducing risk during design reviews and audits while facilitating cross-border deployments.
By providing fast, reliable isolation for up to 600 A with a rugged NEMA 4 enclosure, STS366NP1 minimizes unplanned downtime, protects personnel, and streamlines maintenance. Its compatibility with 24 Vac control and 600 Vac/250 Vdc ratings supports flexible, scalable protection schemes across switchgear and MCCs, delivering a measurable return on safety and efficiency.