Eaton STS366UD11 Shunt Trip Safety Switch - UL Listed
Part Number: STS366UD11
Quick Summary
The Eaton STS366UD11 shunt trip safety switch provides reliable, automatic shutdown for motor control centers and switchgear in industrial settings. Engineers often struggle with timely fault signaling and safe isolation, risking downtime and safety noncompliance. This unit carries cUL Certified and UL Listed approvals, with NEMA 12 and NEMA 3R enclosures to suit indoor and outdoor environments. With a 600 A rating, 24 Vac coil, and non-fusible protection, it delivers robust electrical protection while enabling safer maintenance and reduced lifecycle costs in industrial protection & control applications.
Product Information
Extended Description
STS366UD11 Eaton: Eaton shunt trip safety switch, 600 A, Three-pole, 600 Vac, 250 Vdc, Alarm switch, 24 Vac, 1 NO-1 NC, NEMA 12, NEMA 3R, Non-Fusible, 600 V
Product Name
Eaton shunt trip safety switch
Catalog Number
STS366UD11
UPC
786685829210
Product Length/Depth
12.43 in
Product Height
62.97 in
Product Width
28.29 in
Product Weight
140 lb
Warranty
Eaton Selling Policy 25-000, one (1) year from the date of installation of the Product or eighteen (18) months from the date of shipment of the Product, whichever occurs first.
Certifications
cUL Certified UL Listed
Auxiliary contacts
Alarm switch
Enclosure
NEMA 12, NEMA 3R
Number Of Poles
Three-pole
Type
Shunt trip safety switch
Amperage Rating
600A
Coil voltage
24 Vac
Protection
Non-Fusible
Voltage rating
600 Vac, 250 Vdc
Contact configuration
1 NO-1 NC
Switching Devices Flex Center
Switching Devices Flex Center
Switching Devices Flex Center
Eaton Specification Sheet - STS366UD11
The 600 A, three-pole configuration with a 24 Vac coil delivers robust fault isolation; this reduces arc flash exposure and protects motor control centers, making it ideal for industrial MCC protection and switchgear reliability. The 1 NO-1 NC auxiliary contact enables clear signaling to PLCs and alarm systems, allowing early fault notification and interlock integration that shortens response times. NEMA 12 and NEMA 3R enclosure ratings expand installation options across indoor and outdoor environments, supporting harsh manufacturing floors and process areas without compromising protection. The overall footprint—12.43 in long, 28.29 in wide, and 62.97 in tall with a 140 lb weight—facilitates retrofit and new installations in space-constrained panels while maintaining ease of service access. The UL Listed and cUL Certified approvals simplify regulatory compliance and procurement, backed by Eaton’s established warranty policy for ongoing support and reduced total cost of ownership.
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FAQs
Yes. The STS366UD11 is designed for NEMA 12 and NEMA 3R enclosures, enabling indoor and outdoor installations while maintaining protection against dust, moisture, and other environmental factors.
Key specs include a 600 A amperage rating, three-pole configuration, 24 Vac coil, 600 Vac/250 Vdc voltage ratings, and non-fusible protection with a 1 NO-1 NC contact arrangement.
It is ideal for motor control centers (MCCs) and switchgear in industrial facilities, where rapid, reliable shutdown is required to protect equipment and personnel during fault or safety events.
The product is cUL Certified and UL Listed, providing compliance with common electrical safety standards for industrial equipment.
Plan for space to accommodate the 12.43 in length, 28.29 in width, and 62.97 in height footprint, plus an installation environment that supports NEMA-rated protection; account for a 140 lb weight and access to a 24 Vac control circuit.