Eaton DD326NWKW Fused Safety Switch - UL Listed
Part Number: DD326NWKW
Quick Summary
The DD326NWKW fused safety switch delivers reliable 600 A protection for high-demand industrial panels. It addresses the challenge of safeguarding critical loads while keeping maintenance costs predictable. UL Listed and NEMA 4X rated, with a 304 stainless steel enclosure, it thrives in washdown and harsh environments. The three-pole, four-wire, 240 V configuration supports integration into existing power architectures, and the fusible-with-neutral design simplifies wiring and service. The enclosure accepts large feeders—up to #2 and 750 kcmil conductors—reducing field terminations and improving reliability. The optional window aids commissioning and inspections, reducing downtime during startup and maintenance. This combination supports compliance with industry standards, ensuring long-term reliability. Together, these features deliver safety, long-term reliability, and a lower total cost of ownership for industrial facilities.
Product Information
Extended Description
DD326NWKW Eaton: Eaton Double door single-throw fused safety switch, 600 A, NEMA 4X, Fusible with neutral, Three-pole, Four-wire, 240 V, Max Hp: 400, 500 hp (3PH @480/600 V), (1)#2(1)#2-(1)600, and (1)750 kcmil
Product Name
Eaton double door single-throw fused safety switch
Catalog Number
DD326NWKW
UPC
786679183977
Product Length/Depth
19.31 in
Product Height
25.32 in
Product Width
77.96 in
Product Weight
265 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 configuration
Fusible with neutral
Number Of Poles
Three-pole
Number of wires
4
Type
Heavy duty double door safety switch
Amperage Rating
600A
Fuse class provision
Class H
HP rating - max
400, 500 hp (3PH @480/600 V)
Voltage rating
240V
Product Category
Watertight
Special features
w/ window
ARMS Enclosed Circuit Breaker
ARMS Enclosed Circuit Breaker
ARMS Enclosed Circuit Breaker
ARMS Enclosed Circuit Breaker
ARMS Enclosed Circuit Breaker
Eaton Specification Sheet - DD326NWKW
Selling Policy 25-000 - Distribution and Control Products and Services
Feature 600 A amperage rating with fusible neutral → Business Impact Robust main protection reduces arc-flash exposure and minimizes downtime during fuse changes. Application Suitable for machine centers, processing lines, and large conveyors in manufacturing environments. Feature NEMA 4X stainless steel enclosure → Business Impact Superior corrosion resistance and washdown capability lower maintenance costs and extend service life. Application Ideal for food & beverage, water/wastewater, and chemical processing facilities requiring durable enclosures. Feature Three-pole, four-wire 240 V with Class H fuse → Business Impact Flexible protection for motors and drives, enabling reliable startup and control across standard industrial voltages. Application Suitable for motor control centers and drive-fed machines. Feature Wiring options supporting up to #2 through 750 kcmil conductors → Business Impact Reduces field terminations and simplifies panel wiring, speeding installation and future upgrades. Application Heavy feeder applications and large-power installations. Feature Window for visual inspection and commissioning → Business Impact Faster startup and easier ongoing maintenance with quick status checks. Application Ideal for plants requiring rapid validation during commissioning and routine checks. Feature UL Listed certification and 304 stainless steel enclosure → Business Impact Ensures regulatory compliance and durable performance in harsh environments, improving Total Cost of Ownership. Application Broad industrial deployment with formal certification coverage.
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FAQs
Install the DD326NWKW as a main disconnect for 600 A circuits in a three-pole, four-wire, 240 V system. Ensure proper mounting clearance around the NEMA 4X enclosure and follow local codes for washdown areas. Use the neutral fusible configuration as specified by Eaton, and reference the official specification sheet for lug sizes, torque specs, and wiring diagrams to prevent overheating and ensure safe commissioning.
Yes. The enclosure is NEMA 4X and constructed from 304 stainless steel, making it resistant to water, dust, and many corrosive atmospheres. This design supports washdown services and harsh industrial settings, helping to minimize corrosion-related maintenance and extend service intervals.
The DD326NWKW supports up to 400, 500 hp for 3-phase motors at 480/600 V and uses a Class H fuse provision for robust motor protection. This combination provides reliable switching for high-power drives while meeting common industry fuse standards and protection requirements.
The unit is designed for four-wire configurations with large conductor options, including (1) #2, (1) #2–600 kcmil, and (1) 750 kcmil conductors. This wiring flexibility reduces terminations and simplifies field connections for high-current feeders and motor circuits.
Official documentation is available from Eaton: the Specification Sheet for DD326NWKW at https://www.eaton.com/us/en-us/skuPage.DD326NWKW.pdf, and the Selling Policy 25-000 warranty terms at https://www.eaton.com/content/dam/eaton/company/partnering-with-eaton/selling-policies/sp03000001e.pdf. The product carries Eaton’s warranty policy: 1 year from installation or 18 months from shipment, whichever comes first.