Eaton shunt trip safety switch STS367NP31 - UL Listed
Part Number: STS367NP31
Quick Summary
Eaton shunt trip safety switch STS367NP31 provides rapid trip control for motor protection in industrial switchgear. Engineers often struggle with coordinating upstream protection, reliable signaling, and maintaining panel uptime during live operations. It carries cUL Certified and UL Listed marks and features a NEMA 4 painted-steel enclosure for rugged indoor/outdoor use. Designed for broad compatibility and straightforward installation, it helps reduce commissioning time, simplify compliance, and improve safety margins. With an 800 A rating and three-pole construction, it supports robust protection across 600 Vac and 250 Vdc systems, making it a dependable choice for demanding facilities.
Product Information
Extended Description
STS367NP31 Eaton: Eaton shunt trip safety switch, 800 A, Three-pole, 600 Vac, 250 Vdc, Alarm switch, 120 Vac, 1 NO 1 NC, NEMA 4, Painted steel, Fusible, 600 V
Product Name
Eaton shunt trip safety switch
Catalog Number
STS367NP31
UPC
786685829883
Product Length/Depth
12.43 in
Product Height
71.72 in
Product Width
29.54 in
Product Weight
170 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
Enclosure
NEMA 4
Enclosure material
Painted steel
Number Of Poles
Three-pole
Type
Shunt trip safety switch
Amperage Rating
800A
Coil voltage
120 Vac
Protection
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 - STS367NP31
Shunt trip remote-trip capability with a 120 Vac coil enables immediate isolation whenever the control circuit commands a trip. This improves safety by reducing exposure time to electrical faults and supports compliant shutdown sequences in critical equipment. It is ideal for motor control centers and switchgear requiring rapid remote protection and interlock signaling. Robust current handling: 800 A, three-pole construction handles high fault currents without compromising panel integrity. This reduces conductor stress and equipment wear, extending switchgear life and lowering maintenance costs. It’s well-suited for large-distribution panels and high-demand manufacturing lines. Environmental durability: a NEMA 4 enclosure in painted steel withstands washdown, dust, and moisture exposure. This minimizes downtime from environmental ingress and reduces corrosion-related failures in harsh facilities. It’s ideal for outdoor substations, wash-down areas, and rugged indoor environments. Electrical compatibility: rated 600 Vac and 250 Vdc, with fusible protection and a 1 NO 1 NC alarm-enabled contact configuration. This ensures cross-compatibility across multiple control voltages and provides signaling for automation systems. It’s beneficial for panel assemblies with mixed-voltage control schemes and remote alarm relays. Compliance and lifecycle support: cUL Certified and UL Listed, backed by a one-year warranty from installation or 18 months from shipment. This combination reinforces safety compliance, predictable maintenance planning, and total cost of ownership. Installation efficiency: three-pole design and standard mounting simplify integration with existing equipment and control architectures, enabling quicker commissioning and consistent performance across Eaton-compatible panels.
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FAQs
Plan for a three-pole, NEMA 4 enclosure installation with enough clearances for the 170 lb unit. Ensure control wiring in the 120 Vac coil circuit is rated for the same voltage and that the 1 NO 1 NC signaling contacts are wired to the alarm/auxiliary circuits as required by your panel design.
Yes. The device is designed for 600 Vac mains and 250 Vdc auxiliary circuits, with a 120 Vac coil that accepts standard control voltages. The 800 A three-pole configuration supports high-current protection across these voltages.
It uses a 1 NO 1 NC contact arrangement and includes an alarm switch for signaling. This combination supports remote system monitoring and coordinated shutdown sequences in automated control logic.
The product is cUL Certified and UL Listed, and it comes with a NEMA 4 enclosure in painted steel. These features ensure regulatory compliance and reliable performance in dusty, wet, or washdown environments.
With 800 A capacity, rugged NEMA 4 housing, and remote-trip capability, it reduces downtime, enhances safety, and supports compliant, fast isolation of faults across demanding facilities.