Eaton STS367ND31 Shunt Trip Safety Switch - UL Listed
Part Number: STS367ND31
Quick Summary
Eaton shunt trip safety switch protects switchgear by automatically tripping on fault conditions. In field installations, unexpected downtime and arc flash risk can derail projects; this device delivers rapid, reliable protection with minimal nuisance trips. It carries cUL Certification and UL Listed status, with rugged NEMA 12 and NEMA 3R enclosures for demanding environments, and it supports 600 Vac and 250 Vdc across a three-pole design. For panel builders, it reduces wiring complexity and accelerates commissioning without compromising safety. By combining robust electrical protection with clear alarm signaling, this solution aligns with maintenance workflows, procurement standards, and compliance obligations while enabling safer, more reliable plant operations.
Product Information
Extended Description
STS367ND31 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, Fusible, 600 V
Product Name
Eaton shunt trip safety switch
Catalog Number
STS367ND31
UPC
786685829784
Product Length/Depth
12.43 in
Product Height
71.72 in
Product Width
29.54 in
Product Weight
170 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 12, NEMA 3R
Number Of Poles
Three-pole
Type
Shunt trip safety switch
Amperage Rating
800A
Coil voltage
120 Vac
Protection
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 - STS367ND31
Selling Policy 25-000 - Distribution and Control Products and Services
Feature: 800 A rating on a three-pole shunt trip switch → Business Impact: Enables safe, fast interruption of high‑current faults, reducing fault energy and equipment damage in switchgear & MCCs → Application: Ideal for heavy-duty motor control centers and power distribution panels. Feature: 120 Vac coil voltage for the trip circuit → Business Impact: Simplifies control wiring and energizes from standard plant control voltages, lowering installation costs and enabling quicker integration → Application: Industrial control panels and automated safety interlocks. Feature: 600 Vac / 250 Vdc voltage ratings → Business Impact: Supports both AC and DC control circuits, improving design flexibility and system safety across diverse loads → Application: Mixed‑voltage industrial environments and cross‑line protection strategies. Feature: Alarm switch auxiliary contact (1 NO-1 NC) → Business Impact: Enables real‑time status signaling to sequencing or SCADA, improving outage response and maintenance planning → Application: Alarm and fault signaling in control rooms and remote panels. Feature: Enclosures NEMA 12 and NEMA 3R → Business Impact: Provides dust, drip, and weather protection for indoor/outdoor installations, reducing enclosure retrofit needs → Application: Outdoor substations and harsh‑environment panels. Feature: Certifications and warranty support (cUL, UL Listed) → Business Impact: Strengthens compliance posture and supplier reliability, lowering total cost of ownership through predictable service windows → Application: Procurement specification for regulated facilities and safety‑critical systems.
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FAQs
The STS367ND31 is designed for three‑pole installation with a 120 Vac coil, suitable for standard control circuits and safety interlocks. Plan for mounting in NEMA 12 or NEMA 3R enclosures to match environmental exposure, and wire the 1 NO-1 NC alarm contacts to your control or SCADA system to provide real‑time fault signaling.
Key specs include an 800 A amperage rating, 600 Vac and 250 Vdc voltage ratings, and a 120 Vac coil. The device is fusible and provides a three‑pole configuration with 1 NO-1 NC auxiliary contact, making it suitable for high‑current protection and integrated control signaling in switchgear.
Yes. The STS367ND31 is specified for NEMA 12 and NEMA 3R enclosure compatibility, which supports indoor industrial environments as well as outdoor or damp locations, reducing the need for enclosure modifications and simplifying field installation.
The product is cUL Certified and UL Listed, ensuring compliance with recognized safety standards. This helps meet stringent electrical protection requirements in industrial facilities and supports safe integration with existing safety programs and vendor qualification processes.
Eaton provides a one‑year warranty from installation or eighteen months from shipment, whichever comes first, under policy 25‑000. This coverage supports maintenance planning and reduces long‑term ownership risk while ensuring access to replacement parts and technical assistance.