Eaton STS368ND32-1B00 Heavy Duty Shunt Trip - UL Listed
Part Number: STS368ND32-1B00
Quick Summary
Eaton Heavy Duty Shunt Trip Safety Switch STS368ND32-1B00 provides automatic shutdown for large electrical feeders. In demanding plants, delayed isolation can escalate fault cascades and downtime; this unit delivers fast actuation and reliable protection. UL Listed and cUL Certified, it also carries rugged NEMA 12 and NEMA 3R enclosure ratings for dependable service in harsh environments. Designed for 1200A protection with 600 Vac / 250 Vdc ratings and a 120 Vac coil, it integrates with existing MCCs and control schemes to strengthen safety and compliance.
Product Information
Extended Description
STS368ND32-1B00 Eaton: Eaton Heavy Duty Shunt Trip Safety Switch, 1200A, 600 Vac, 250 Vdc, Three pole, Enclosure- NEMA 12, NEMA 3R, Fusible
Product Name
Eaton Heavy Duty Shunt Trip Safety Switch
Catalog Number
STS368ND32-1B00
UPC
786689314286
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 12, NEMA 3R
Number Of Poles
Three-pole
Amperage Rating
1200A
Coil voltage
120 Vac
Protection
Fusible
Voltage rating
600 Vac, 250 Vdc
Double Up on Safety
Double Up on Safety
Double Up on Safety
Eaton Specification Sheet - STS368ND32-1B00
High-current protection is engineered to handle 1200A, ensuring rapid isolation of large feeders during fault conditions; the business impact is reduced arc flash exposure and minimized production downtime, making it ideal for manufacturing lines and data center feeders. The shunt trip mechanism with a 120 Vac coil enables fast, reliable actuation on control signals, supporting safer start-ups and emergency shutdowns in complex motor control schemes. Rugged enclosure options, NEMA 12 for indoor dry locations and NEMA 3R for outdoor or wash-down environments, translate into fewer enclosure-related failures and longer service intervals. Dual voltage capability—600 Vac and 250 Vdc—along with a 120 Vac coil provides flexible protection across multi-voltage panels, simplifying design and improving site-wide protection coordination. The unit ships with 1NO/NC auxiliary contacts and includes 480V CPT and GF relay sensors, enabling streamlined integration with protection relays and monitoring systems, reducing wiring complexity and installation time. Certifications and documentation, including UL Listed and cUL Certified labeling, support regulatory compliance and third-party audits, while the three-pole configuration ensures precise fault isolation in three-phase systems. Overall, the STS368ND32-1B00 delivers robust protection, improved safety metrics, and a clear return on safety and uptime investments for industrial facilities.
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FAQs
When planning installation, verify three-pole mounting and space for a large industrial switch within a control panel or MCC enclosure. The unit supports NEMA 12 indoor and NEMA 3R outdoor-rated environments, so place it where dust, moisture, or wash-downs may occur. Ensure the auxiliary contacts are wired into the control scheme and that the 120 Vac coil is supplied from the appropriate control circuit. Use proper torque on mounting hardware and follow Eaton’s catalog notes for included relays and sensors to optimize protection signaling and fault isolation.
The switch is rated for 1200A, enabling direct protection of large feeders and motors without frequent device trips. Fusible protection helps coordinate with upstream protection schemes, while a 600 Vac / 250 Vdc rating covers diverse supply configurations. The three-pole construction provides balanced interruption across phases, and the 120 Vac coil enables fast, reliable actuation. This combination reduces arc flash risk and improves system availability in demanding environments.
Industries with heavy electrical feeders, large motor drives, and critical process lines benefit most, including manufacturing, chemical processing, oil & gas, mining, and data centers. Applications include motor control centers, switchgear assemblies, and distributed control panels where rapid isolation and high-current protection are essential for safety and uptime. The NEMA 12/3R enclosure supports both indoor and outdoor installations common in these sectors.
The STS368ND32-1B00 is UL Listed and cUL Certified, confirming compliance with recognized safety and performance standards. These certifications simplify regulatory approvals, customer audits, and formal safety programs. The enclosure ratings (NEMA 12 and NEMA 3R) further demonstrate suitability for varied environments, improving reliability in challenging deployment locations.
Maintenance benefits include robust, proven construction and reduced failure modes for high-current protection. The unit ships with 1NO/NC auxiliary contacts and integrated sensors/relays, enabling easier monitoring and control integration, which lowers wiring complexity and maintenance costs. A reliable switch with UL/cUL certification also reduces downtime costs and supports longer service intervals, delivering a clear return on safety investment across large facilities.