Eaton DH321NWK Heavy Duty Fusible Safety Switch - NEMA 4X
Part Number: DH321NWK
Quick Summary
Eaton heavy duty fusible safety switch isolates 3-phase motor circuits in harsh industrial environments. Downtime and corrosion risk slow plants; this unit has a corrosion resistant 304 stainless enclosure that minimizes rust and maintenance. It carries UL Listed certification and NEMA 4X rating, ensuring safe operation in moist or dusty environments, even outdoors. For electrical protection and circuit control workloads, this switch lowers installation time and extends service life, delivering total cost of ownership benefits. Rated 30A, 240V with three poles and four wires, it supports standard 1-3 horsepower motor loads. The fusible design with neutral provides quick disconnection and protection that aligns with modern codes.
Product Information
Extended Description
DH321NWK Eaton: Eaton Enhanced visible blade single-throw safety switch, Corrosion resistant, 30 A, NEMA 4X, 304 stainless steel, Class H, Neutral, Three-pole, Four-wire, 240 V, Max Hp: 1.5, 3/ 3, 7.5/ 5 hp (1,3PH @Std/TD, 250 Vdc), #14-#2 Cu/Al
Product Name
Eaton heavy duty fusible safety switch
Catalog Number
DH321NWK
UPC
782113205441
Product Length/Depth
10.22 in
Product Height
19.08 in
Product Width
7.73 in
Product Weight
22 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
UL Listed
Enclosure
NEMA 4X
Enclosure material
304 stainless steel
Fuse class provision
Class H
Fuse configuration
Fusible with neutral
Number Of Poles
Three-pole
Number of wires
4
Type
Heavy duty fusible safety switch
Wire size
#14-2 AWG Cu/Al
Amperage Rating
30A
HP rating - max
1.5, 3/ 3, 7.5/ 5 hp (1,3PH @Std/TD, 250 Vdc)
NEMA rating
NEMA 4X (Stainless)
Voltage rating
240V
Product Category
Heavy Duty, Fusible with neutral
The 304 stainless steel enclosure provides exceptional corrosion resistance for washdown and outdoor installations, reducing maintenance cycles and extending service life in harsh environments. This translates to lower total cost of ownership and higher equipment availability in food and beverage facilities, water treatment plants, and outdoor switchgear. The NEMA 4X rating protects critical components from dust, water ingress, and chemical exposure, enabling compliant operation in challenging locations while maintaining ease of maintenance and serviceability. Fusible with neutral configuration adds a selective protection strategy, ensuring quick isolation during fault events and safeguarding downstream equipment from unnecessary outages, which translates to improved plant uptime and safer shutdown procedures. Compatibly wired for #14-2 AWG Cu/Al conductors, the unit supports straightforward installation and integration into existing motor control circuits without costly rewiring. The Class H fuse provision enhances protection against electrical overloads while supporting documented downtime reduction and safer maintenance practices. This device is designed for three-pole, four-wire systems, delivering reliable control for 240V motor feeds with predictable performance and simple field servicing. With UL Listed certification and a robust stainless enclosure, OEMs and end users gain confidence that installations meet applicable safety and reliability standards while minimizing compliance risk. The robust construction aligns with industrial safety expectations, enabling long-term operation within demanding production environments and reducing parts replacement frequency.
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FAQs
DH321NWK is designed for 3-phase motor circuits with a three-pole, four-wire configuration and a 240V rating. Its NEMA 4X stainless steel enclosure provides corrosion resistance and ingress protection suitable for dusty, wet, outdoor, and washdown environments. The unit supports standard motor loads up to 1.5 to 7.5 HP (depending on configuration and voltage), enabling reliable control with minimal maintenance in challenging facilities.
The DH321NWK is UL Listed and features a NEMA 4X (stainless) enclosure. UL Listed certification confirms conformance to safety standards for electrical equipment, while NEMA 4X ensures protection against corrosion, windblown dust and rain, and washdowns. These certifications support compliance with industry codes in process plants, water treatment facilities, and outdoor installations, reducing procurement risk and facilitating installer acceptance.
Yes, the DH321NWK is designed for #14 to #2 AWG Cu/Al conductors. It provides a four-wire connection with neutral, suitable for standard 240V three-phase circuits. This compatibility simplifies field wiring, reduces the need for special conductors, and supports flexible integration into existing motor control panels without custom cabling.
The unit is specified with a product length/depth of 10.22 inches, a height of 19.08 inches, and a width of 7.73 inches, with an approximate weight of 22 pounds. When planning mountings, ensure adequate clearance for wiring, door operation, and service access, and account for ventilation in hot environments. The stainless enclosure is compatible with standard panel mounting practices used in industrial facilities.
Eaton offers a warranty of one year from the date of installation or eighteen months from the date of shipment, whichever occurs first. This policy supports spare parts availability and service support, helping owners plan maintenance budgets. For critical installations, consider coordinating with Eaton's support channels to optimize replacement timelines and ensure continued protection of motor circuits.