Eaton STS367UD31 Shunt Trip Safety Switch - UL Listed
Part Number: STS367UD31
Quick Summary
Eaton STS367UD31 shunt trip safety switch rapidly isolates power in high-demand electrical panels. Engineers often struggle with nuisance trips and slow responses in protective devices, leading to downtime. It carries UL Listed and cUL Certified marks, with a three-pole design housed in a durable NEMA 12 / NEMA 3R enclosure, supporting 800 A and voltages up to 600 Vac / 250 Vdc. This combination delivers dependable safety performance in industrial control environments. By aligning with UL/cUL requirements and standard motor-control practices, it enables easier procurement, tighter compliance, and straightforward installation in new or retrofit panels. The result is safer shutdowns, reduced maintenance events, and predictable protection for critical production lines.
Product Information
Extended Description
STS367UD31 Eaton: Eaton shunt trip safety switch, 800 A, Three-pole, 600 Vac, 250 Vdc, Alarm switch, 120 Vac, 1 NO 1 NC, NEMA 12, NEMA 3R, Non-Fusible, 600 V
Product Name
Eaton shunt trip safety switch
Catalog Number
STS367UD31
UPC
786685830063
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 12, NEMA 3R
Number Of Poles
Three-pole
Type
Shunt trip safety switch
Amperage Rating
800A
Coil voltage
120 Vac
Protection
Non-Fusible
Voltage rating
600 Vac, 250 Vdc
Contact configuration
1 NO 1 NC
ARMS Enclosed Circuit Breaker
ARMS Enclosed Circuit Breaker
ARMS Enclosed Circuit Breaker
Eaton Specification Sheet - STS367UD31
Feature: 800 A amperage rating in a three-pole, non-fusible configuration. Business Impact: Enables robust protection for high-current feeders, reducing overload risk and limiting arc flash exposure. Application: Large motor feeders and power distribution panels. This configuration supports rapid, reliable isolation under fault conditions and simplifies protective coordination with upstream devices. Feature: 120 Vac coil voltage and 1 NO 1 NC contact arrangement. Business Impact: Streamlines integration with standard control circuits and minimizes wiring complexity. Application: Control circuits and safety interlocks within industrial automation panels. Feature: Enclosure compatibility with NEMA 12 and NEMA 3R. Business Impact: Provides dust, moisture, and weather resistance for indoor and outdoor or harsh plant environments. Application: Industrial facilities, outdoor substations, and service entrances. Feature: Dimensional footprint and weight (12.43 in depth, 29.54 in width, 71.72 in height; 158 lb). Business Impact: Facilitates panel planning and cabinet compatibility, reducing upgrade time and installation risk. Application: Retrofit projects and new builds with constrained spaces. Feature: Certifications and warranty (UL Listed, cUL Certified; one-year warranty or 18 months from shipment). Business Impact: Improves procurement confidence, regulatory alignment, and total cost of ownership through predictable support. Application: Compliance-driven specifications and long-term maintenance planning.
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FAQs
STS367UD31 supports three-pole mounting in electrical panels with a NEMA 12 / NEMA 3R enclosure. Plan for a depth of 12.43 in, width of 29.54 in, and height of 71.72 in, with a weight around 158 lb. Ensure proper wiring space, adequate clearance, and compatible conductors for the 120 Vac coil and 800 A main path. The unit is non-fusible and suited for retrofit or new installations.
The STS367UD31 provides an 800 A amperage rating, 600 Vac and 250 Vdc voltage ratings, a 120 Vac coil, and a 1 NO 1 NC contact configuration. These specs support high-current protection and fast isolation across industrial power circuits, enabling coordinated protection for motors, feeders, and MCCs while maintaining safe control of the fault response.
This device is well-suited for motor control centers, power distribution panels, and safety interlock circuits in factories and processing plants. With its three-pole design and robust enclosure ratings, it supports reliable shutdowns in demanding environments, helping to minimize unplanned downtime and improve overall plant safety and reliability.
STS367UD31 is UL Listed and cUL Certified, ensuring compliance with common North American safety standards. These certifications facilitate procurement, streamline regulatory reviews, and support installation in certified electrical rooms and control cabinets, reducing engineering time and risk during project approvals.
With a one-year warranty (or eighteen months from shipment) and proven protective performance, the STS367UD31 reduces downtime and maintenance events by delivering dependable fault isolation. Its compatibility with standard 120 Vac control circuits and protection for high-current feeders translates to lower lifecycle costs and faster return on investment for industrial facilities.