Crouse-Hinds DSD933 Explosion-...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$404.91
$402.46
Eaton Crouse-Hinds DSD933 Explosion-Proof Snap Switch Cover & Device Sub-Assembly - 20 A, 120/277 V, 1-Pole, Copper-Free Aluminum

Crouse-Hinds DSD933 Explosion-Proof Snap Switch Cover & Device Sub-Assembly - 20A, 120/277V, Single-Pole, Class I Division 1

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Model: DSD933

In Stock (leaves warehouse same day if ordered before 3pm ET)

$404.91
$402.46
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Crouse-Hinds DSD933 Explosion-Proof Snap Switch Cover & Device Sub-Assembly

Professional hazardous location switching solution with Class I Division 1 certification

The Crouse-Hinds DSD933 Explosion-Proof Snap Switch Cover & Device Sub-Assembly delivers reliable switching control for hazardous and classified locations. This single-pole unit features a robust 20A rating at 120/277V and meets stringent Class I Division 1 requirements. Constructed with durable Feraloy iron alloy material and NEMA 3 rating, this explosion-proof switch assembly provides dependable performance in demanding industrial environments where safety and compliance are critical.

Professional Features & Benefits

  • 20A Amperage Rating: Handles substantial electrical loads with reliable switching capacity for industrial applications
  • 120/277V Dual Voltage: Compatible with standard commercial and industrial voltage systems for versatile installation flexibility
  • Class I Division 1 Certification: Meets the highest hazardous location safety standards for explosive atmosphere protection
  • Feraloy Iron Alloy Construction: Provides exceptional durability and corrosion resistance in harsh industrial environments
  • NEMA 3 Rating: Offers protection against weather, windblown dust, and external ice formation for outdoor applications
  • Single-Pole Configuration: Delivers precise control for dedicated circuit switching with simplified wiring requirements
  • NEC/CEC Standards Compliance: Ensures installation meets North American electrical code requirements for professional installations

Technical Specifications

  • Amperage Rating: 20A
  • Area Classification: Hazardous/Classified Locations
  • Configuration: 1-pole
  • Nec Hazardous Rating: Class I, Division 1
  • Nema Rating: 3
  • Number Of Poles: Single-pole
  • Product Height: 6.7 in
  • Product Length Depth: 5.3 in
  • Product Material: Feraloy iron alloy
  • Product Weight: 2.5 lb
  • Product Width: 4.6 in
  • Standards Type: NEC/CEC
  • Voltage Rating: 120/277 Vac

Professional Applications

  • Petrochemical Processing Facilities
  • Oil and Gas Production Sites
  • Chemical Manufacturing Plants
  • Paint and Solvent Storage Areas
  • Grain Handling and Processing
  • Pharmaceutical Manufacturing
  • Hazardous Material Storage Facilities

Why Choose Crouse-Hinds Quality?

Crouse-Hinds explosion-proof switching solutions provide uncompromising safety and reliability in the most demanding hazardous environments. With Class I Division 1 certification, NEMA 3 weather protection, and durable Feraloy iron alloy construction, this switch assembly delivers the professional-grade performance required for critical industrial applications where safety cannot be compromised.

Manufacturer Resources

Product Specs

Amperage Rating:
20A
Area Classification:
Hazardous/Classified Locations
Configuration:
1-Pole
Nec Hazardous Rating:
Class I, Division 1
Nema Rating:
3
Number Of Poles:
Single-pole
Product Height:
6.7 in
Product Length Depth:
5.3 in
Product Material:
Feraloy iron alloy
Product Weight:
2.5 lb
Product Width:
4.6 in
Standards Type:
NEC/CEC
Voltage Rating:
120/277 Vac
Department:
Electrical
Product Type:
Hazardous Location Switch
Product Subgroup:
Switches
Product Group:
Wiring Devices

Crouse-Hinds DSD933 – Frequently Asked Questions

1) Is the Crouse-Hinds DSD933 a complete switch, or do I still need an enclosure body?
The DSD933 is a cover and device sub-assembly, meaning it is the snap switch and its cover together, not a finished enclosure. It mounts onto a hazardous-location device body of the matching Crouse-Hinds line, so plan on a body and the conduit hubs for the run as separate line items. Electrically the assembly itself is complete: single-pole, 20A, 120/277 Vac.
2) Can the DSD933 explosion-proof snap switch be used in a Class I Division 1 area?
Yes. The DSD933 carries a Class I, Division 1 hazardous rating, so it is suited to areas where flammable gas or vapor is present under normal operating conditions, such as process areas in petrochemical, chemical, and solvent-handling facilities. It is built to NEC/CEC standards for North American installations. If your area is classified Division 2 only, this switch still applies, since a Division 1 device is acceptable in a Division 2 location.
3) Will a 20A explosion-proof snap switch handle my 277V lighting circuit?
Yes, within its ratings: 20A at 120/277 Vac, which covers a standard 277V branch lighting circuit as well as 120V control and receptacle circuits. It is a single-pole device, so it switches one ungrounded conductor. For a 480V load, or for switching both legs of a 208/240V circuit, this is the wrong device and you need a two-pole or higher-voltage rated unit.
4) Do I need an explosion-proof switch like this, or is a standard weatherproof switch acceptable?
That is decided by the area classification, not by preference. In a location classified Class I, Division 1, the switch has to be rated for it, because a standard snap switch arcs at the contacts and that arc is the ignition source the classification exists to contain. The DSD933 is rated Class I, Division 1 and built to NEC/CEC requirements. Outside a classified area, a general-purpose or weatherproof switch is the correct and far simpler choice, and the heavy iron-alloy assembly buys you nothing.
5) Can this Crouse-Hinds explosion-proof switch be mounted outdoors?
NEMA 3 is the enclosure rating, so the assembly is built for outdoor service against rain, windblown dust, and external ice formation. That covers exterior process areas, tank farms, and loading racks. NEMA 3 is not a washdown or hosedown rating, so if the location gets pressure-washed regularly, specify a device rated for direct water jets instead.
6) How much room do I need to allow for the DSD933 switch assembly?
Allow for a footprint of 6.7 inches high, 4.6 inches wide, and 5.3 inches deep. The depth is what usually catches people out on a crowded rack or inside a guardrail, since the operating lever and cover sit well off the mounting surface. Weight is 2.5 lb, light enough to hang on a strut or a conduit-supported body without extra bracing.
7) Is the DSD933 switch body corrosion resistant enough for a coastal or chemical plant?
Feraloy iron alloy is the construction material, an iron alloy Crouse-Hinds uses on hazardous-location fittings for its strength and corrosion resistance, and it takes the plant's protective finish system. Combined with the NEMA 3 rating it is intended for exposed industrial service. In severely corrosive process areas, plants often standardize on the aluminum-bodied equivalents instead, so match whatever the rest of your conduit system is built from to avoid dissimilar metal problems at the hubs.
How fast can I get the Crouse-Hinds DSD933 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Crouse-Hinds DSD933 come with a warranty?
Absolutely. The Crouse-Hinds DSD933 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Crouse-Hinds DSD933?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Crouse-Hinds DSD933 from ZenSupply?
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