Eaton DD363FWKW Fused Safety Switch - UL Listed
Part Number: DD363FWKW
Quick Summary
Eaton fused safety switch DD363FWKW provides safe isolation for three-phase equipment in industrial plants. In busy facilities, downtime from failed disconnects and difficult fuse access drives up maintenance costs and safety risk. UL Listed, a NEMA 4X enclosure, and 304 stainless steel construction deliver dependable protection in washdown and outdoor environments. With a 100 A protection, 600 V rating, and a robust Class H fuse design, it supports reliable motor control while simplifying compliance. Designed for ease of installation and long-term service, it pairs with standard motor starters and MCCs to reduce wiring errors and total cost of ownership.
Product Information
Extended Description
DD363FWKW Eaton: Eaton Double door single-throw fused safety switch, 100 A, NEMA 4X, 304 stainless steel, Class H, Fusible without neutral, Three-pole, Three-wire, 600 V, Max Hp: 30, 40/ 60, 75 hp (1/3PH @480, 600 V), #14-#1/0
Product Name
Eaton double door single-throw fused safety switch
Catalog Number
DD363FWKW
UPC
786679173824
Product Length/Depth
39.19 in
Product Height
10.21 in
Product Width
12.33 in
Product Weight
50 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
Wire size
#14-1/0 AWG
Amperage Rating
100A
Fuse class provision
Class H
HP rating - max
30, 40/ 60, 75 hp (1/3PH @480, 600 V)
NEMA rating
NEMA 4X
Voltage rating
600 V
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 - DD363FWKW
Feature → Business Impact → Application. Fusible without neutral simplifies wiring for three-wire, three-pole circuits, reducing panel space and stock while enabling quick fuse replacement in motor-control centers and MCC panels. This translates to lower installation time and fewer wiring mistakes on rush projects. Amperage rating of 100 A supports mid-sized motor loads, enabling reliable protection for conveyors, pumps, and machine tools with minimal voltage drop and consistent performance. The 600 V rating expands compatibility with mixed voltage systems found in industrial facilities, enabling seamless integration with existing plant infrastructure and reducing equipment rework. The NEMA 4X enclosure, paired with 304 stainless steel construction, delivers corrosion resistance in washdown and outdoor environments, lowering maintenance cycles and extending service life in food processing, chemical processing, and outdoor utility applications. The three-pole, three-wire design provides straightforward wiring and safe, predictable disconnection, while the optional window feature allows fuse status checks without opening the enclosure, improving uptime and safety inspections. In addition, UL Listed certification and Class H fuse protection support regulatory compliance and proven reliability, reducing risk for OEMs and end users while delivering a favorable total cost of ownership. Warranty and Eaton support further minimize lifecycle risk and provide peace of mind for plant engineers during upgrades or retrofits.
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FAQs
Install on a level, sturdy surface with adequate clearance for door swing and service access. Use the 39.19 in depth, 12.33 in width, and 10.21 in height footprint as a guide for enclosure mounting. Wire with #14-1/0 AWG conductors into the three-pole, three-wire configuration and ensure fusible protection without neutral. Verify 600 V system compatibility, install LO/TO procedures, and utilize the window to monitor fuse status during maintenance.
The enclosure is NEMA 4X rated and constructed from 304 stainless steel, delivering excellent corrosion resistance in washdown, chemical, and outdoor settings. UL Listed certification further confirms electrical reliability. These features minimize maintenance needs, extend service life in challenging environments, and help maintain uptime in food processing, water treatment, and outdoor plant installations.
The switch supports up to 100 A and up to 600 V, with a maximum HP rating of 30, 40/60, 75 hp for 1/3-phase operation at 480–600 V. This makes it suitable for mid-size motors in conveyors, pumps, and machine tools, enabling effective overload and short-circuit protection while integrating with common MCC configurations.
Key certifications include UL Listed protection, NEMA 4X enclosure rating, and Class H fuse provisions. The device is designed for safe, code-compliant isolation of three-phase circuits up to 600 V, with a fusible configuration that supports quick replacement and reliable motor protection. Ensure application aligns with UL standards and local electrical codes when deploying in plant environments.
Benefits include reduced downtime thanks to an accessible window for fuse inspection, corrosion resistance from the 304 stainless enclosure, and long service life in demanding environments. The 100 A, 600 V rating supports a wide range of motor loads, lowering replacement costs, while UL compliance and a robust fuse design minimize safety-related risks and maintenance overhead over the life of the system.