Eaton STS368ND33-1B00 Shunt Trip Safety Switch - UL Listed
Part Number: STS368ND33-1B00
Quick Summary
Eaton STS368ND33-1B00 Shunt Trip Safety Switch provides fast protective isolation for large industrial electrical systems. In the field, delayed trips or nuisance activations can cause costly downtime; this unit combines rugged durability with reliable actuation to help keep equipment and personnel safe. It carries UL Listed and cUL Certified markings, and its NEMA 12/NEMA 3R enclosure protects against dust, splash, and moderate corrosion in demanding environments. Rated for 1200 A with 600 Vac and 250 Vdc, and a 120 Vac coil, it suits high‑power motor control and safety interlock needs. Includes 2NO/2NC Aux Con, 480V CPT, and GF Relay & Sensors, simplifying installation and regulatory compliance while enabling scalable protection.
Product Information
Extended Description
STS368ND33-1B00 Eaton: Eaton Heavy Duty Shunt Trip Safety Switch, 1200 A, 600Vac, 250 Vdc, Three pole, NEMA 12,NEMA 3R, Fusible
Product Name
Eaton Heavy Duty Shunt Trip Safety Switch
Catalog Number
STS368ND33-1B00
UPC
786689314293
Product Length/Depth
23.15 in
Product Height
72.5 in
Product Width
47.23 in
Product Weight
405 lb
Certifications
UL Listed cUL Certified
Catalog Notes
Includes 2NO/2NC Aux Con, 480V CPT and GF Relay & Sensors
Enclosure
NEMA 12, NEMA 3R
Number Of Poles
Three-pole
Amperage Rating
1200A
Coil voltage
120 Vac
Protection
Fusible
Voltage rating
600 Vac, 250 Vdc
ARMS Enclosed Circuit Breaker
ARMS Enclosed Circuit Breaker
ARMS Enclosed Circuit Breaker
Eaton Specification Sheet - STS368ND33-1B00
Feature: High amperage and voltage rating (1200 A, 600 Vac, 250 Vdc) enables safe isolation of large loads; Business Impact: Reduces the risk of cascading faults and minimizes downtime during fault conditions; Application: Motor feeders and heavy-duty line protection in industrial facilities. Feature: Three-pole design with 120 Vac coil delivers reliable actuation across complex safety circuits; Business Impact: Streamlines control wiring and enhances interlock reliability, improving plant safety and process continuity; Application: Safety interlocks in automated lines and controlled shutdown sequences. Feature: NEMA 12 and NEMA 3R enclosure protection provides dust, splash, and moderate corrosion resistance; Business Impact: Extends service life in challenging environments, lowering maintenance costs; Application: Indoor environments with washdown exposure and outdoor safe areas. Feature: Integrated auxiliary contacts (2NO/2NC) plus GF Relay & Sensors simplify monitoring and signaling; Business Impact: Improves visibility of safety status and reduces wiring complexity; Application: Alarm signaling, interlock feedback, and remote control loops. Feature: Catalog notes and compatibility with 480V CPT enable seamless integration with existing control architectures; Business Impact: Lower engineering effort during retrofit or system upgrades; Application: Modernizing legacy safety circuits with minimal downtime.
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FAQs
The STS368ND33-1B00 uses a three-pole configuration with a 120 Vac coil and 1200 A rating, enabling rapid isolation of large motors and feeders. It includes 2NO/2NC auxiliary contacts, allowing status feedback and remote interlock signaling to existing PLCs or safety relays. This integration reduces wiring complexity and supports smoother retrofits into established control architectures.
This switch features a NEMA 12 and NEMA 3R enclosure, delivering dust protection and splash resistance suitable for indoor and mild outdoor environments. The rugged construction helps protect the mechanism from environmental contaminants, reducing maintenance cycles and extending service life in demanding manufacturing floors or protected outdoor areas.
The STS368ND33-1B00 is UL Listed and cUL Certified, ensuring compliance with key safety and performance standards for industrial protection devices. These certifications support regulatory compliance in facilities that require formal third-party verification for safety interlocks and motor control accessories.
Yes. The catalog notes include 2NO/2NC auxiliary contacts, 480V CPT, and GF Relay & Sensors, enabling direct signaling and sensor feedback within control circuits. This compatibility simplifies wiring, reduces integration risk, and supports advanced interlock and diagnostic schemes in complex safety architectures.
By delivering rapid isolation (600 Vac, 250 Vdc) for high‑power loads and providing robust auxiliary signaling, the STS368ND33-1B00 improves uptime, enhances regulatory compliance, and reduces the cost of unplanned downtime. The rugged enclosure and proven certifications support longer service life and fewer maintenance interventions in mission-critical applications.