Eaton STS366UP3 Shunt Trip Safety Switch - NEMA 4
Part Number: STS366UP3
Quick Summary
The Eaton STS366UP3 Shunt Trip Safety Switch delivers fast, fail-safe circuit interruption for 600 A systems in control panels and switchgear. In critical automation environments, unreliable trip devices can cause unplanned downtime and safety risk; this unit reduces nuisance trips and streamlines integration with standard control logic. It carries cUL Certified and UL Listed marks alongside a rugged NEMA 4 painted steel enclosure, supporting reliable performance in harsh environments. Designed for electrical protection and control, it delivers safer operations in industrial facilities, helping you meet safety codes while simplifying maintenance and spare parts planning. This combination of protection, reliability, and ease of service translates to lower lifecycle costs and higher uptime across your power distribution architecture.
Product Information
Extended Description
STS366UP3 Eaton: Eaton shunt trip safety switch, 600 A, Three-pole, 600 Vac, 250 Vdc, 120 Vac, NEMA 4, Painted steel, Non-Fusible, 600 V
Product Name
Eaton shunt trip safety switch
Catalog Number
STS366UP3
UPC
786685829326
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
cUL Certified UL Listed
Enclosure
NEMA 4
Enclosure material
Painted steel
Number Of Poles
Three-pole
Type
Shunt trip safety switch
Amperage Rating
600A
Coil voltage
120 Vac
Protection
Non-Fusible
Voltage rating
600 Vac, 250 Vdc
Feature → Business Impact → Application: 600 A amperage rating delivers robust fault current handling, enabling rapid isolation of high-current circuits and reducing arc flash exposure in MCCs and switchgear. This translates to measurable downtime reduction and safer maintenance windows for critical lines. Feature → Application: Three-pole shunt trip with 120 Vac coil voltage enables seamless integration with standard control circuits, allowing remote trip capability from centralized safety interlocks and PLCs used in packaging lines, metalworking, and water treatment facilities. Feature → Business Impact → Application: Non-Fusible design simplifies serviceability and reduces spare parts inventory, while 600 Vac and 250 Vdc voltage ratings support versatility across feeder and control circuits in mixed-load environments. Feature → Compatibility: NEMA 4 enclosure in painted steel provides weather and splash resistance, enabling installation in outdoor substations or damp plant areas without compromising protection. Feature → Compliance: UL Listed and cUL Certified ratings support electrical codes and project specifications, reducing procurement risk and speeding up approvals. Feature → Installation advantages: Clear catalog number STS366UP3 and straightforward mounting integrate with existing panels, minimizing commissioning time and training needs for maintenance staff.
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FAQs
The STS366UP3 is a three-pole shunt trip safety switch rated for 600 A, designed for installation in electrical distribution panels, motor control centers (MCCs), and switchgear. Its 600 Vac / 250 Vdc ratings and 120 Vac coil enable straightforward integration with standard control circuits, reducing complex rework and enabling quick retrofits in existing installations.
Key ratings include a 600 A amperage capacity, 600 Vac and 250 Vdc voltage ratings, and a 120 Vac coil voltage. The device is non-fusible and is configured for three-pole operation, making it suitable for centralized control and rapid isolation in high-energy systems.
Yes. The STS366UP3 uses a NEMA 4 painted steel enclosure, providing protection against ingress and moisture. It carries UL Listed and cUL Certified marks, supporting installation in demanding industrial environments and facilitating compliance with safety regulations.
The product carries Eaton’s warranty terms: one year from installation or eighteen months from shipment, whichever occurs first. This aligns with Eaton Selling Policy 25-000 and provides technical support and service documentation to ensure reliable performance in critical power systems.
A shunt trip switch enables remote, rapid shutdown of high-current circuits, reducing arc flash exposure and improving operator safety. By improving compliance with electrical codes and decreasing unscheduled downtime, it yields lower maintenance costs and faster recovery for critical processes in manufacturing, water treatment, and material handling facilities.