Eaton STS368ND32-1C00 Shunt Trip Safety Switch - UL Listed
Part Number: STS368ND32-1C00
Quick Summary
The Eaton shunt trip safety switch delivers fast, controlled power disconnection for industrial control panels and motor control centers. Engineers often struggle with balancing rapid fault shutdowns against equipment downtime and safety compliance in demanding environments. UL Listed and cUL Certified protections, plus NEMA 12 and NEMA 3R enclosure ratings, support robust indoor and outdoor installations. With a 120 Vac coil and high current capacity, it aligns with modern control architectures while helping reduce risk and simplify maintenance. This combination of protection, compatibility, and performance translates into safer, more efficient operations for OEMs and end users.
Product Information
Extended Description
STS368ND32-1C00 Eaton: Eaton shunt trip safety switch, with AFGF relay, 1200 A, Three-pole, 600 Vac, 250 Vdc, 120 Vac, 1NO 1NC, NEMA 12, NEMA 3R, Fusible, 600 V
Product Name
Eaton shunt trip safety switch
Catalog Number
STS368ND32-1C00
UPC
786689369736
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
Enclosure
NEMA 12, NEMA 3R
Number Of Poles
Three-pole
Type
Shunt trip safety switch w/ AFGF relay
Amperage Rating
1200A
Coil voltage
120 Vac
Protection
Fusible
Voltage rating
600 Vac, 250 Vdc
Contact configuration
1NO 1NC
ARMS Enclosed Circuit Breaker
ARMS Enclosed Circuit Breaker
ARMS Enclosed Circuit Breaker
Eaton Specification Sheet - STS368ND32-1C00
With a 1200 A amperage rating, this switch is built to interrupt heavy-duty loads in large panelboards and motor control centers. The business impact is clear: fewer devices in parallel reduce wiring complexity and increase reliability, while enabling quicker protective action during overloads. Remote trip capability is enabled by a 120 Vac coil, allowing control systems to initiate shutdown from a central PLC or emergency stop network, which enhances operator safety and minimizes response time. Three-pole construction ensures synchronized breaking of all three phases, essential for balanced protection in three-phase systems, while the 1NO 1NC contact configuration provides flexible signaling and control options for interlocking and status monitoring. Enclosure ratings of NEMA 12 and NEMA 3R offer environmental protection for indoor and outdoor installations, reducing maintenance needs in harsh facilities. The fusible protection and AFGF relay support selectivity and arc-flash performance, and the 600 Vac / 250 Vdc rating broadens compatibility with mixed voltage systems. UL Listed and cUL Certified compliance supports audits and procurement workflows, reinforcing reliability across global operations.
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FAQs
The STS368ND32-1C00 is a three-pole device with a 1NO 1NC contact configuration, designed to trip all three phases simultaneously. This synchronization is essential for preventing unequal phase currents and ensuring coordinated shutdown in three-phase motor control centers and power distribution panels. It also simplifies interlocking schemes and status signaling within standard industrial control architectures.
Key ratings include a 1200 A interrupting capacity, 600 Vac line voltage, and 250 Vdc maximum, with a coil voltage of 120 Vac for remote actuation. These specifications enable safe integration with high-current loads and mixed-voltage control circuits, while providing compatibility with common PLCs and emergency-stop networks used in manufacturing and process environments.
Yes. The enclosure ratings NEMA 12 and NEMA 3R provide dust/ moisture protection suitable for indoor manufacturing floors and certain outdoor or semi-exposed locations. This makes the device adaptable for equipment rooms, protected outdoor stations, and panels that require robust environmental resilience without additional enclosure modifications.
The AFGF relay is designed to operate with the shunt trip function and supports reliable remote tripping. Regular inspection should verify electrical contacts, wiring integrity, and coil continuity, especially after fault events. Maintain clean terminations and confirm that protective devices upstream remain coordinated to minimize nuisance trips and maximize service life of downstream equipment.
The device is UL Listed and cUL Certified, which supports safety approvals and global procurement. Its NEMA 12 and NEMA 3R enclosure ratings provide environmental protection, while the shunt trip with a 120 Vac coil aligns with standard industrial control practices. These certifications simplify audits, commissioning, and integration in regulated manufacturing environments.