Eaton STS368NP33-1B00 Shunt Trip Safety Switch - UL Listed
Part Number: STS368NP33-1B00
Quick Summary
Eaton STS368NP33-1B00 Shunt Trip Safety Switch provides heavy-duty circuit protection for industrial switchgear and control panels. Engineers often confront downtime caused by slow fault isolation and noncompliant hardware. This unit carries UL Listed and cUL Certified ratings and comes in a rugged NEMA 4 enclosure for demanding environments. With a 1200 A rating and a three-pole design, it delivers reliable disconnection when faults occur and includes 2NO/2NC auxiliary contacts with 480 V CPT and GF relay & sensors for flexible control, installation, and future expansion. In short, it reduces risk, improves safety, and supports compliant, scalable electrical protection in process and manufacturing facilities.
Product Information
Extended Description
STS368NP33-1B00 Eaton: Eaton Heavy Duty Shunt Trip Safety Switch, 1200 A, Three-pole, 600 Vac, 250 Vdc, NEMA 4, Fusible
Product Name
Eaton Heavy Duty Shunt Trip Safety Switch
Catalog Number
STS368NP33-1B00
UPC
786689314330
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 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 - STS368NP33-1B00
Feature → Business Impact → Application: The STS368NP33-1B00 delivers 1200 A, three-pole, fusible protection for high-current circuits, enabling rapid fault isolation and reduced downtime in switchgear installations used in heavy industries. This translates to safer equipment shutdown and minimized production losses in motor control centers and manufacturing lines. Application: Ideal for industrial process automation, power distribution panels, and large MCCs where dependable interruption is essential. Feature → Business Impact → Application: The 120 Vac coil voltage provides compatibility with standard control circuits, simplifying integration and reducing control wiring complexity. This supports faster panel retrofit projects and easier field maintenance in automation cabinets. Application: Retrofit and new-build control panels. Feature → Business Impact → Application: The combination of 600 Vac / 250 Vdc voltage ratings and fusible protection enables flexible protection schemes across AC and DC sections, improving compliance with safety standards and enabling selective coordination. Application: Mixed-pressure or mixed-volt circuits in processing plants. Feature → Business Impact → Application: The rugged NEMA 4 enclosure and substantial dimensions (23.15 in L, 72.5 in H, 47.23 in W) with a 405 lb weight provide robust outdoor and washdown performance, reducing enclosure-related maintenance. Application: Outdoor substations and harsh indoor environments. Feature → Business Impact → Application: Includes 2NO/2NC auxiliary contacts and compatibility with 480 V CPT and GF Relay & Sensors, enabling advanced signaling, diagnostics, and integration with modern control systems. Application: Smart maintenance and fault monitoring in automated lines. Feature → Business Impact → Application: UL Listed and cUL Certified status supports regulatory compliance and customer acceptance across North American facilities, minimizing project risk and speeding procurement. Application: Industries with strict safety certifications and procurement requirements.
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FAQs
For retrofit or new builds, plan for a three-pole fusible safety switch with a NEMA 4 enclosure. The unit measures 23.15 in L x 72.5 in H x 47.23 in W and weighs 405 lb, so account for lifting and mounting clearances. It includes 2NO/2NC auxiliary contacts and is UL Listed and cUL Certified, aiding seamless compliance.
Key specs include a 1200 A amperage rating, three-pole arrangement, 600 Vac / 250 Vdc voltage rating, 120 Vac coil voltage, and fusible protection. The enclosure is NEMA 4, designed for harsh environments, with a catalog note that confirms 2NO/2NC auxiliary contacts and integration with 480 V CPT and GF Relay & Sensors.
Yes. Its three-pole 1200 A design and fusible protection type make it suitable for high-current motor control centers, process automation panels, and switchgear assemblies. The 120 Vac coil voltage simplifies control circuit integration, while the 2NO/2NC auxiliary contacts enable local signaling and remote diagnostics essential for automated processes.
The STS368NP33-1B00 is UL Listed and cUL Certified, ensuring regulatory compliance in North American facilities. It is housed in a NEMA 4 enclosure, providing protection against dust, water, and harsh environmental conditions, making it suitable for indoor and outdoor installations where reliability matters.
The unit’s rugged construction and high-current capacity reduce downtime from protective failures and enable safer, faster isolation during faults. Built-in 2NO/2NC auxiliary contacts and compatibility with 480 V CPT and GF Relay & Sensors streamline wiring and diagnostics, lowering installation time and ongoing maintenance costs while improving protection reliability and safety compliance.