Eaton Crouse-Hinds DSD SR30121 Selector Switch - Hazardous/Classified Locations
Part Number: DSD SR30121
Manufacturer
Eaton Crouse-Hinds
Part number
DSD SR30121
Quick Summary
Eaton Crouse-Hinds selector switch DSD SR30121 provides rugged control for industrial equipment in hazardous locations. Engineers often face reliability and compliance challenges when wiring control devices in explosive environments. This unit delivers NEC/CEC compliance with Class I Division 1 ratings, UL listings, and NEMA protection. By pairing with EDS/EFS back boxes, it simplifies installation, reduces wiring complexity, and supports scalable control architectures—delivering lower lifecycle costs and enhanced equipment uptime for process, mining, and chemical facilities.
Product Information
Extended Description
DSD SR30121 Eaton Crouse-Hinds: Eaton Crouse-Hinds series DSD-SR selector switch, 30A, Single-pole, 2, Double-throw without off, 600 Vac, EDS/EFS back boxes
Product Name
Eaton Crouse-Hinds series DSD-SR selector switch
Catalog Number
DSD SR30121
Product Length/Depth
2.38 in
Product Height
5.875 in
Product Width
3.5 in
Product Weight
1 lb
UPC
662276028777
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
Double-throw without off
Number Of Poles
Single-pole
Number Of Positions
2
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 SR30121
Feature: 30A current rating at 600 Vac supports direct control of medium-sized motors and pumps, reducing the need for extra contactors. Business Impact: minimizes panel footprint, wiring, and energy losses, improving overall efficiency. Application: conveyors, pumps, and fans in hazardous environments where space and reliability matter. Feature: Single-pole, 2-position double-throw without off simplifies control logic. Business Impact: lowers misoperation risk and accelerates panel wiring. Application: straightforward motor start/stop sequencing in process lines and safety interlocks. Feature: Compatibility with EDS/EFS back boxes. Business Impact: faster field installation, tighter enclosure integrity, and easier code-compliant wiring. Application: hazardous-location control panels in oil, gas, and chemical plants. Feature: NEC/CEC compliance, UL listings, and NEMA ratings (3, 5, 12). Business Impact: regulatory assurance, safer operations, and reduced inspection overhead. Application: equipment operating in toxic atmospheres or dust environments with stringent enclosure requirements. Feature: Robust explosion-proof housing and proven durability. Business Impact: longer service life, lower replacement costs, and higher uptime. Application: harsh facilities such as refining, mining, and pharmaceuticals where reliability is mission-critical.
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FAQs
The DSD SR30121 is designed to be used with EDS/EFS back boxes, enabling a secure, code-compliant installation in Class I, Division 1 environments. This compatibility simplifies panel mounting, protects wiring, and reduces install time in hazardous facilities.
Key specs include a 30A amperage rating, 600 Vac voltage rating, single-pole configuration, and a 2-position double-throw (without off) arrangement. These ratings support reliable switching of motors and pumps while meeting NEC/CEC requirements for hazardous locations.
Yes. The selector switch carries NEC hazardous ratings Class I Division 1, along with UL listings and NEMA protection ratings, making it appropriate for hazardous/classified locations in industries such as oil, gas, and chemical processing.
The DSD SR30121 supports NEC/CEC standards, UL certifications, and NEMA ratings of 3, 5, and 12. Its construction is aimed at hazardous-location compliance, helping facilities meet regulatory requirements during commissioning and inspections.
With explosion-proof housing, UL/NEC compliance, and compatibility with EDS/EFS back boxes, the unit reduces wiring complexity and downtime. This translates to lower maintenance costs, fewer component replacements, and improved equipment uptime, contributing to a favorable return on investment in demanding industrial environments.