Eaton STS368NP32-1B00 Shunt Trip Safety Switch UL Listed
Part Number: STS368NP32-1B00
Quick Summary
"Eaton Shunt Trip Safety Switch is a heavy-duty protective interlock for automatic power isolation in industrial control panels." Many panels face downtime during faults due to slow trip actions, wiring complexity, and space constraints. UL Listed and cUL Certified safety components, plus a NEMA 4 enclosure, deliver reliable operation in harsh environments and a 600 Vac main power rating with a 120 Vac control coil. By combining a three-pole, 1200 A assembly with 1NO/2NC auxiliary contacts and integrated protective sensing, it simplifies panel design while boosting regulatory compliance. Engineers gain faster installation, reduced wiring, and improved reliability, making this switch a strategic choice for heavy-duty protection and operational resilience.
Product Information
Extended Description
STS368NP32-1B00 Eaton: Eaton Shunt Trip Safety Switch, Heavy Duty, Three-pole, 600Vac, 1200A, Fusible, NEMA 4 (painted steel), 120Vac solenoid, 1NO/2NC Aux Contact, Ground Fault Relay and CT
Product Name
Eaton Heavy Duty Shunt Trip Safety Switch
Catalog Number
STS368NP32-1B00
UPC
786689314323
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 1NO/NC Aux Con, 480V CPT and GF Relay & Sensors
Enclosure
NEMA 4
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 - STS368NP32-1B00
Feature three-pole, fusible design provides synchronized isolation of all three phases, dramatically reducing arc exposure and ensuring a complete shutdown. Business impact: enhanced personnel safety, lower risk of partial energization, and easier compliance with electrical protection standards. Application: motor feeders and high-current feeders in manufacturing lines benefit from consistent, reliable tripping behavior. Feature 600 Vac main rating with 1200 A current capacity supports large loads while maintaining fast response; coil voltage at 120 Vac enables straightforward control circuit integration. Business impact: minimizes nuisance trips and supports scalable protection schemes; Application: distribution panels and feeder circuits in conveyors and presses. Feature NEMA 4 painted steel enclosure withstands dust, water, and washdown environments, enabling outdoor and harsh-site installations. Business impact: extended service life and reduced enclosure maintenance costs; Application: outdoor panels and wet environments in food & beverage, water treatment, and process industries. Feature 1NO/2NC auxiliary contacts plus Ground Fault Relay and CT provide onboard signaling and leakage protection, with a 480 V CPT option noted for compatibility. Business impact: simplified wiring topology, real-time fault monitoring, and faster maintenance diagnostics; Application: control panels needing integrated sensing and alarm capability. Feature UL Listed and cUL Certified across the assembly reinforces compliance for North American safety standards, while a three-pole configuration and fusible protection align with common plant safety policies. Business impact: reduces approval cycles and boosts ROI through minimized downtime; Application: any capital project prioritizing safety and regulatory adherence.
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FAQs
For 600 Vac systems, mount the three-pole fusible switch in a NEMA 4 enclosure as specified, ensuring sufficient space for the 405 lb unit and clear access to the 1NO/2NC auxiliary contacts. Plan wiring to accommodate the 120 Vac control coil and the Ground Fault Relay with CT, while preserving clean separation between control and power circuits. Verify compatibility with 480 V CPT option if used in ancillary sensing.
Key specs include a 1200 A amperage rating, 600 Vac main voltage, and 120 Vac coil voltage for control. The device is three-pole and fusible, with NEMA 4 enclosure for harsh environments. It offers 1NO/2NC auxiliary contacts and integrated Ground Fault Relay and CT, plus optional 480 V CPT sensing, enabling coordinated protection and signaling in panel assemblies.
Yes. The unit uses a NEMA 4 enclosure, designed for painted steel protection against dust, water, and washdown. This makes it suitable for outdoor or harsh indoor locations typical in industrial facilities. When installing outdoors, ensure weather exposure is consistent with NEMA 4 ratings and that coil control wiring remains isolated from the high‑current conductors.
The switch includes 1NO/2NC auxiliary contacts for signaling, plus a Ground Fault Relay and CT for leakage detection. This enables remote trip status monitoring, safer interlock wiring, and faster fault diagnosis. Integrated sensing reduces external components, simplifies panel wiring, and supports proactive maintenance by providing real-time fault data to control systems.
This heavy-duty shunt trip switch improves safety and reduces downtime by delivering rapid, reliable isolation during faults. Its compliance with UL Listed and cUL Certified standards, along with a rugged NEMA 4 enclosure and high current rating, supports regulatory adherence and long-term ROI through lower maintenance costs, fewer unplanned outages, and streamlined integration into existing protection schemes.