Eaton DD328NWKW Fused Safety Switch - UL Listed
Part Number: DD328NWKW
Quick Summary
Eaton DD328NWKW fused safety switch is designed to deliver reliable, high-current protection for industrial motor circuits. The challenge engineers face is keeping large equipment safe from faults while maximizing uptime in harsh environments, where corrosion, dust, and moisture can compromise safety and availability. The unit features a NEMA 4X enclosure and 304 stainless steel construction, with UL Listed certification to meet rigorous electrical and safety standards. This combination supports dependable protection for demanding installations while simplifying compliance and maintenance. By pairing robust mechanical design with a clear wiring path and flexible fuse with neutral configuration, this switch delivers operational reliability and long-term cost efficiency for motor-control applications.
Product Information
Extended Description
DD328NWKW Eaton: Eaton Double door single-throw fused safety switch, 1200 A, NEMA 4X, 304 stainless steel, Class L, Fusible with neutral, Three-pole, Four-wire, 240 V, Max Hp: 500, 500 hp (3PH @480/600 V), (4)#1/0-(4)750 kcmil
Product Name
Eaton double door single-throw fused safety switch
Catalog Number
DD328NWKW
UPC
786679184493
Product Length/Depth
27.18 in
Product Height
43.11 in
Product Width
91.02 in
Product Weight
575 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
1200A
Fuse class provision
Class L
HP rating - max
500, 500 hp (3PH @480/600 V)
Voltage rating
240V
Product Category
Watertight
Special features
w/ window
Flex Center Customized Double Door Switch with Voltage Indicator and Safe-Test Point
Flex Center Customized Double Door Switch with Voltage Indicator and Safe-Test Point
Flex Center Customized Double Door Switch with Voltage Indicator and Safe-Test Point
Flex Center Customized Double Door Switch with Voltage Indicator and Safe-Test Point
Flex Center Customized Double Door Switch with Voltage Indicator and Safe-Test Point
Eaton Specification Sheet - DD328NWKW
High-current protection with 1200 A rating supports large motors and feeders, reducing fuse replacement frequency and enabling safe isolation during maintenance. The three-pole, four-wire configuration simplifies wiring, improves fault clearance, and enhances system reliability for complex motor-control schemes. Fusible with neutral plus Class L fuse delivers selective coordination, limiting fault energy and shortening downtime while protecting upstream equipment from damage in the event of a fault. The NEMA 4X enclosure and 304 stainless steel construction provide exceptional corrosion resistance and washdown durability, making the unit suitable for outdoor, wet, or harsh industrial environments and minimizing long-term maintenance costs. A 240 V supply and a max HP rating of 500 hp (3PH @480/600 V) enable seamless integration with common drive systems and large conveyors, pumps, or mixers. The built-in window feature allows quick status checks without opening the enclosure, reducing maintenance cycles and operator exposure. Overall, the DD328NWKW combines rugged protection with straightforward installation and long-term serviceability to support reliable plant availability and compliance.
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FAQs
For proper installation, mount the DD328NWKW on a stable surface suitable for a 575 lb unit, ensure a 240 V power supply, and wire per the three-pole, four-wire configuration with a neutral. Verify NEMA 4X sealing for outdoor or washdown applications, and reference the UL Listed requirements. Use appropriate wiring methods and fusing per Class L specifications to achieve correct coordination and protection.
The DD328NWKW is rated for up to 1200 A and a maximum of 500 hp for 3-phase systems at 480/600 V. It operates at 240 V and is designed for high-throughput motor-control environments. These ratings support large drives and conveyors, enabling a single switch to protect substantial motor loads while maintaining efficient fault isolation.
Yes. The enclosure is NEMA 4X and the construction uses 304 stainless steel, which provides excellent corrosion resistance and washdown durability. This makes the DD328NWKW appropriate for outdoor installations, food processing, water treatment, and other environments where exposure to moisture, dust, or cleaning agents is common.
The DD328NWKW carries UL Listed certification, confirming compliance with recognized safety standards for electrical equipment. The NEMA 4X enclosure and 304 stainless steel construction further support reliability in harsh environments. These certifications help simplify procurement, ensure regulatory alignment, and reduce project risk in industrial facilities.
The unit is covered by Eaton’s warranty policy, typically one year from installation or eighteen months from shipment, whichever occurs first. Routine maintenance includes inspecting enclosure integrity, checking fuse status, and confirming proper wiring. Because of its robust construction and corrosion-resistant enclosure, scheduled inspections can be spaced to optimize uptime while maintaining safety compliance.