Eaton STS366UP14 Shunt Trip Safety Switch - NEMA 4
Part Number: STS366UP14
Quick Summary
The Eaton STS366UP14 shunt trip safety switch provides remote tripping for large electrical protection panels. In demanding facilities, downtime and unsafe shutdowns can compromise productivity; this device enables fast, controlled isolation without manual intervention. It carries cUL Listed and UL Certified marks, and ships in a NEMA 4 painted steel enclosure for rugged environments. With a 600 A rating, a 24 Vac coil, and a 1 NO 1 NC alarm contact, it integrates with plant safety systems while meeting core regulatory requirements. Designed for industrial safety and circuit protection, it supports reliable remote signaling and fast isolation in switchgear, control panels, and power distribution enclosures. Its rugged construction helps reduce maintenance costs and sustains uptime in harsh installations.
Product Information
Extended Description
STS366UP14 Eaton: Eaton shunt trip safety switch, 600 A, Three-pole, 600 Vac, 250 Vdc, Alarm switch, 24 Vac, 1 NO 1 NC, NEMA 4, Painted steel, Non-Fusible, 600 V
Product Name
Eaton shunt trip safety switch
Catalog Number
STS366UP14
UPC
786685829319
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
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 Vac
Protection
Non-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 - STS366UP14
600 A, three-pole, non-fusible architecture delivers robust main-circuit protection. This high current capability reduces the need for additional protective devices and minimizes arc-energy exposure during remote trips. It is ideal for large switchgear and distribution panels in manufacturing plants where downtime is costly and safety is paramount. Coil voltage of 24 Vac enables easy integration with standard control systems and plant automation. The 1 NO 1 NC auxiliary contact provides remote alarm signaling to SCADA and maintenance systems. Together, this enables coordinated interlocks and alarms, supporting faster fault diagnosis and reduced mean time to repair. NEMA 4 enclosure and painted steel body protect against dust, water, and washdowns. This reduces enclosure-related downtime and extends service life in harsh environments. 600 Vac and 250 Vdc voltage ratings cover typical AC distribution and DC control circuits, while the non-fusible design simplifies protection schemes and improves reliability across installations. Certifications from cUL Listed and UL Listed support regulatory compliance across markets, and a one-year Eaton warranty lowers procurement risk. Robust weight and rugged construction also help justify lifecycle costs in busy facilities. Compatibility and installation advantages include straightforward wiring for 24 Vac control circuits and ready access to Eaton's specification resources for fast commissioning.
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FAQs
Installing the STS366UP14 in existing 600 A switchgear requires verifying the three-pole, non-fusible design, 24 Vac coil, and enclosure type. It is designed for a NEMA 4-rated environment and uses a 1 NO 1 NC alarm contact for remote signaling. Follow Eaton's installation guide STS366UP14 and reference the datasheet for wiring diagrams, torque specs, and clearance requirements.
Core specifications include a 600 A amperage rating, three poles, 24 Vac coil, and voltage ratings of 600 Vac and 250 Vdc. The unit is non-fusible and provides a 1 NO 1 NC auxiliary contact (alarm). Enclosure is NEMA 4 and constructed from painted steel, designed for rugged industrial environments and reliable remote operation.
Yes. The shunt trip safety switch uses a NEMA 4 painted steel enclosure, which offers protection against dust and water ingress in harsh environments and washdown areas. This makes it suitable for outdoor panels and industrial facilities that require rugged protection and dependable remote tripping.
The STS366UP14 is cUL Certified and UL Listed, reflecting compliance with North American safety standards. This certification supports regulatory acceptance across industries and simplifies procurement for safety-critical installations in regulated environments.
Eaton provides a warranty per policy 25-000: one year from installation or eighteen months from shipment, whichever occurs first. The device’s robust construction, remote signaling capability, and alarm integration help reduce downtime and support faster maintenance response, contributing to lower lifecycle costs in busy facilities.