Eaton DSD SR30320 SX178 DSD-SR selector switch - Hazardous
Part Number: DSD SR30320 SX178
Manufacturer
Eaton Crouse-Hinds
Part number
DSD SR30320 SX178
Quick Summary
DSD SR30320 SX178 is a rugged selector switch designed for hazardous-location control panels in industrial facilities. This device addresses maintenance and safety challenges by offering lockout for two-position operation and a handle that stays in either position, reducing inadvertent starts. It carries NEC/CEC compliance and hazardous-location ratings, including Class I, Division 1; Class II, Division 1; Class III, plus a NEMA 3, 5, 12 enclosure compatibility for tough environments. Designed for 600 Vac, 30 A three-pole circuits, it integrates smoothly with EDS/EFS back boxes to streamline panel upgrades. By combining robust certification with easy installation, it supports faster commissioning, safer shutdowns, and lower lifecycle costs for industrial automation projects.
Product Information
Extended Description
DSD SR30320 SX178 Eaton Crouse-Hinds: Eaton Crouse-Hinds series DSD-SR selector switch, 30A, Three-pole, 2, Lockout for two position switch, handle in either position, On/Off, 600 Vac, EDS/EFS back boxes
Product Name
Eaton Crouse-Hinds series DSD-SR selector switch
Catalog Number
DSD SR30320 SX178
Product Length/Depth
2.38 in
Product Height
5.875 in
Product Width
3.5 in
Product Weight
1.6 lb
UPC
662276028791
Area classification
Hazardous/Classified Locations
Standards type
NEC/CEC
NEC hazardous rating
Class I, Division 1 Class II, Division 1 Class III
NEMA Rating
3 5 12
Amperage Rating
30A
Voltage rating
600 Vac
Switch function
On/Off
Number Of Poles
Three-pole
Number Of Positions
2
Special features
Lockout for two position switch, handle in either position
Used with
EDS/EFS back boxes
DSD-SR Series Explosionproof HP Rated Selector Switch Sub-assembly catalog page
DSD-SR Explosionproof HP Rated Selector Switch Sub-assembly UL certification
DSD-SR Explosionproof HP Rated Selector Switch Sub-assembly UL certification
Eaton Specification Sheet - DSD SR30320 SX178
Feature: 30A, 600 Vac three-pole On/Off with lockout for two-position operation. Business Impact: Enables safe lockout protocols and prevents accidental restarts, reducing maintenance risk and injury. Application: Ideal for motor control and process panels in hazardous locations. In practice, this means quicker, safer maintenance windows and compliant, auditable shutdown procedures. Feature: NEC/CEC compliance with hazardous-location ratings (Class I, Division 1; Class II, Division 1; Class III) and NEMA 3, 5, 12 enclosure compatibility. Business Impact: Improves regulatory alignment and protects equipment in demanding environments, lowering non-compliance costs. Application: Oil & gas, chemical processing, mining, and similar plants. Feature: EDS/EFS back box compatibility for straightforward retrofits. Business Impact: Reduces installation time and wiring errors, accelerating project timelines. Application: Panel upgrades and new installations with Eaton back boxes. Feature: 600 Vac capacity and 30A rating for reliable control. Business Impact: Supports typical motor and control circuits with robust protection; Application: MCCs, pumps, conveyors in hazardous zones. Feature: 2-position handle retained in either position for safe maintenance cycles. Business Impact: Improves operator safety and simplifies lockout/tagout workflows. Application: Routine servicing and emergency shutdowns in hazardous environments. Feature: Cataloged design with clear traceability (DSD SR30320 SX178). Business Impact: Streamlines procurement, inventory management, and compatibility checks. Application: System design and commissioning in regulated facilities.
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FAQs
The DSD SR30320 SX178 is designed for Eaton EDS and EFS back boxes, enabling safe terminations and sealed mounting in hazardous locations. Its 3-pole, 2-position On/Off configuration with 600 Vac 30 A ratings matches common MCC and control-panel requirements, and the back-box compatibility supports quick retrofits and consistent enclosure integrity in Class I/II/III environments.
The lockout for the two-position switch ensures the circuit cannot be re-energized during maintenance, enhancing worker safety and compliance with lockout/tagout protocols. This feature is especially valuable in hazardous-location control panels where unintended starts pose significant risk during servicing or rehabilitation of equipment.
Yes. Rated at 600 Vac and 30 A with three-pole On/Off operation, the DSD SR30320 SX178 is well-suited for motor control in hazardous locations. Its design supports reliable switching for three-phase circuits and can be integrated into standard control panels that require robust protection in Class I/II/III environments.
This selector switch carries NEC/CEC compliance with hazardous-location ratings (Class I, Division 1; Class II, Division 1; Class III) and NEMA ratings 3, 5, 12. These certifications matter because they confirm suitability for explosive zones, ensure safe operation in demanding environments, and simplify regulatory approvals during audits and installations.
Upgrading to the DSD SR30320 SX178 provides safer operation through lockout capability, faster commissioning via EDS/EFS back box compatibility, and compliance with NEC/CEC and hazardous-area standards. The result is reduced downtime, fewer risk-related incidents, and lower long-term maintenance costs, delivering a favorable return on investment for oil, gas, chemical, and mining automation projects.