Eaton STS367UP31 Shunt Trip Safety Switch - UL Listed
Part Number: STS367UP31
Quick Summary
Eaton STS367UP31 shunt trip safety switch protects critical motor circuits by rapidly disconnecting power in motor control centers. Too often, engineers wrestle with nuisance trips and complex wiring when upgrading legacy gear, driving downtime and risk. These devices carry UL Listed and cUL Certified approvals, plus a rugged NEMA 4, painted steel enclosure for IP-rated protection in challenging environments. Designed for high-current control, it supports 800 A, 600 V ratings, and a 120 Vac coil to simplify integration with standard control circuits. In practice, this translates to faster fault isolation, safer personnel operation, and predictable procurement across industrial automation projects.
Product Information
Extended Description
STS367UP31 Eaton: Eaton Shunt trip safety switch, 800 A, 1NO/1NC alarm switch only, Coil V: 120 Vac, NEMA 4, Painted steel, 600 V, Three-pole, Non-fusible
Product Name
Eaton shunt trip safety switch
Catalog Number
STS367UP31
UPC
786685830155
Product Length/Depth
12.43 in
Product Height
71.72 in
Product Width
29.54 in
Product Weight
158 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
800A
Coil voltage
120 Vac
Protection
Non-fusible
Voltage rating
600 V
Contact configuration
1 NO/NC
Switching Devices Flex Center
Switching Devices Flex Center
Switching Devices Flex Center
Eaton Specification Sheet - STS367UP31
Feature: 800 A amperage rating with a three-pole, non-fusible construction. Business Impact: Handles heavy motor loads and reduces panel redesigns during expansion. Application: Large MCCs and switchgear where robust overcurrent protection is essential. Feature: 120 Vac coil voltage. Business Impact: Simplifies control-system integration and reduces wiring complexity. Application: Standard control circuits and low-voltage control panels. Feature: 600 V voltage rating with 1 NO/NC alarm contact. Business Impact: Enables clear fault signaling and safe, compliant isolation. Application: Monitoring circuits and remote annunciation in process lines. Feature: NEMA 4 enclosure with painted steel. Business Impact: Ensures reliable operation in damp, dusty, or outdoor environments, lowering maintenance costs. Application: Industrial plants with challenging ambient conditions. Feature: UL Listed and cUL Certified. Business Impact: Facilitates procurement and regulatory audits, streamlining approvals. Application: Compliance-driven projects and safety certifications. Feature: Compact footprint and weight considerations (12.43 in depth, 29.54 in width, 71.72 in height; 158 lb). Business Impact: Predictable installation planning and mounting in large panels. Application: Control-room and equipment room installations where space planning matters. Feature: 1 NO/NC alarm contact. Business Impact: Supports alarms, BMS integrations, and remote fault signaling. Application: Plant-wide safety monitoring and preventive maintenance programs.
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FAQs
STS367UP31 is a three-pole shunt trip safety switch used to rapidly disconnect power in motor control centers and switchgear during overcurrent events. It offers 800 A capacity, 600 V rating, and a 120 Vac coil with 1 NO/NC alarm contact for monitoring. Typical applications include large industrial drives, pumping stations, and process lines requiring fast, reliable protection.
The STS367UP31 uses a 120 V ac coil and is rated for up to 800 A with a maximum line voltage of 600 V. It is a non-fusible, three-pole device featuring a single 1 NO/NC alarm contact for monitoring and signaling protective actions within muscled electrical systems.
Yes. STS367UP31 is designed for rugged conditions with a NEMA 4 painted steel enclosure, providing protection against dust, splashing water, and other harsh environmental factors. This enclosure choice supports reliable operation in damp, dirty, or outdoor industrial settings and facilitates installation in both panels and exposed locations.
The product is UL Listed and cUL Certified. The Eaton specification sheet for STS367UP31 is available from Eaton’s site, and the official datasheet can be accessed via the product downloads section, helping with design validation, safety reviews, and maintenance planning.
Plan for a three-pole, non-fusible installation in large panels; allocate space for a unit with a footprint of 12.43 in depth, 29.54 in width, and 71.72 in height, weighing about 158 lb. Wire the 120 Vac coil and the 1 NO/NC alarm contact, and ensure system voltages do not exceed 600 V while carrying up to 800 A.