Eaton DD328FWKW Fused Safety Switch - UL Listed
Part Number: DD328FWKW
Quick Summary
The Eaton DD328FWKW fused safety switch provides isolation and protection for high-current, three-phase systems in industrial facilities. In demanding environments, downtime and corrosion risk threaten uptime and safety, so a rugged, reliable enclosure matters. This device features a UL Listed rating and a NEMA 4X watertight enclosure in 304 stainless steel, delivering corrosion resistance and dependable performance in washdown and harsh conditions. With three-pole operation, fusible without neutral configuration, and Class L fusing, it supports heavy motor loads up to 1200 A and 500 hp, while enabling straightforward maintenance through a window and accessible design. For engineers and procurement teams, this switch aligns with safety standards, reduces spare-part inventories, improves compliance, and supports long-term energy management goals.
Product Information
Extended Description
DD328FWKW Eaton: Eaton Double door single-throw fused safety switch, 1200 A, NEMA 4X, 304 stainless steel, Class L, Fusible without neutral, Three-pole, Three-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
DD328FWKW
UPC
786679184417
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 without neutral
Number Of Poles
Three-pole
Number of wires
3
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
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Eaton Specification Sheet - DD328FWKW
Feature 1: Amperage and power handling — 1200 A, 240 V, three-pole configuration with three wires, and a max of 500 hp. Business impact: accommodates large motors and high-inertia loads while maintaining protective isolation, reducing motor stalls and arc-flash exposure. Application: large conveyors, pumps, and processing equipment in heavy industries. Feature 2: Fuse configuration and class — Fusible without neutral with Class L protection. Business impact: extended fuse life, predictable fault clearing, and safer maintenance routines, translating to lower spare-part costs and downtime. Application: plant-wide motor control centers and critical feeders. Feature 3: Enclosure and materials — NEMA 4X rating in 304 stainless steel with a watertight, corrosion-resistant design. Business impact: exceptional durability in washdown and corrosive environments, lowering maintenance frequency. Application: food/beverage, chemical processing, and water treatment. Feature 4: Physical access and maintenance — heavy-duty double-door design with a window for fuse status inspection. Business impact: faster servicing, reduced downtime, and safer fuse verification. Application: field service and panel retrofit projects. Feature 5: Certifications and warranty — UL Listed with a one-year (install) or eighteen-month (ship) warranty. Business impact: regulatory confidence and predictable support timelines, enabling procurement planning and cost control.
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FAQs
For installation, plan for a substantial footprint given the 91.02 in width and 575 lb weight. Ensure proper mounting clearance for the double-door design and window access for fuse status checks. Use a compatible three-pole, three-wire configuration with fusible without neutral, and verify 240 V supply and protective devices are sized for up to 1200 A. Confirm enclosure is oriented for accessible maintenance and safe reach.
The device is rated for 1200 A at 240 V with a three-pole, three-wire configuration. It uses fusible without neutral protection and employs Class L fusing. The maximum motor horsepower supported is 500 hp (3PH @480/600 V). These ratings support high-demand industrial motors while maintaining a high level of protection and selectivity in power distribution.
Yes. The enclosure is NEMA 4X rated and constructed from 304 stainless steel, providing excellent corrosion resistance and water ingress protection. This makes the switch suitable for washdown areas in food processing, beverage, and chemical processing facilities, as well as other harsh environments where corrosion and moisture are concerns.
The DD328FWKW carries UL Listed certification, confirming compliance with recognized safety standards. The NEMA 4X enclosure and 304 stainless steel construction further support regulatory and environmental compliance for demanding applications. These certifications help simplify procurement audits, warranty eligibility, and installation validation in regulated industries.
Maintenance is streamlined by the window for fuse status inspection and a robust, durable enclosure that reduces corrosion-related upkeep. The Class L fuse and fusible-without-neutral configuration can extend fuse life and improve fault management, contributing to lower downtime and a faster return on investment in high-demand motor circuits.