Eaton DD366FWKW-00V2 Fused Safety Switch - NEMA 4X
Part Number: DD366FWKW-00V2
Quick Summary
Eaton DD366FWKW-00V2 fused safety switch provides safe isolation for three-phase industrial motors and equipment. In demanding plants, uptime is critical, and a rugged disconnect must withstand washdown, corrosion, and frequent maintenance without compromising safety. This unit carries UL Listed certification and features a NEMA 4X, 304 stainless steel enclosure, ensuring reliable performance in harsh environments. With a 600 A rating and a Class H fuse, it supports high-horsepower motors while keeping service intervals predictable. Using this switch translates to reduced wiring complexity, faster lockout/tagout, and a clear status view via the load-side voltage indicator.
Product Information
Extended Description
DD366FWKW-00V2 Eaton: Eaton Double door single-throw fused safety switch, Voltage indicator load side, 600 A, NEMA 4X, Class H, Fusible without neutral, Three-pole, Three-wire, 600 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
DD366FWKW-00V2
UPC
786679184738
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 without neutral
Number Of Poles
Three-pole
Number of wires
3
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
600 V
Product Category
Watertight
Special features
V indicator load side, 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 - DD366FWKW-00V2
Feature: 600 A amperage rating with a three-pole, three-wire configuration and fusible without neutral. Business Impact: Enables safe, high-current motor isolation and reduces wiring complexity in large industrial circuits. Application: Main disconnects for heavy-duty motor drives in manufacturing lines and material handling. Feature: HP rating up to 400–500 hp at 480/600 V. Business Impact: Supports high-horsepower motors without oversizing protection devices, improving panel space efficiency. Application: Conveyor belts, pumps, and presses in demanding plants. Feature: Voltage indicator on the load side with a window. Business Impact: Provides quick, at-a-glance status during maintenance, reducing downtime and risk of accidental energization. Application: Field service checks and routine line clearances. Feature: NEMA 4X enclosure in 304 stainless steel. Business Impact: Delivers corrosion resistance and washdown capability, extending life in harsh or outdoor environments. Application: Food & beverage, chemical processing, and outdoor installations. Feature: Fuse configuration Fusible without neutral with Class H protection. Business Impact: Delivers selective protection for three-phase circuits while simplifying wiring and maintenance decisions. Application: Heavy-duty motor circuits requiring reliable isolation and fast fault clearing. Feature: UL Listed certification and robust construction. Business Impact: Supports regulatory compliance and asset reliability, enhancing maintenance planning and uptime. Application: Industrial facilities with strict safety standards and service contracts. Feature: Warranty and service policy. Business Impact: Provides lifecycle assurance, reducing total cost of ownership through predictable support. Application: Asset management programs and long-term plant reliability.
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FAQs
The DD366FWKW-00V2 is a three-pole, three-wire disconnect configured with fusible without neutral. It is designed to protect three-phase motor circuits and supports high-current applications up to 600 A. Follow manufacturer wiring diagrams and select appropriately rated conductors to ensure a safe, code-compliant installation and reliable fault clearing.
Yes. The switch uses a NEMA 4X enclosure made from 304 stainless steel, providing corrosion resistance and washdown capability. This makes it well-suited for harsh industrial environments, including chemical processing, food and beverage processing, and outdoor installations where moisture and contaminants are present.
The unit supports up to 600 A with a maximum HP rating of 400–500 hp for three-phase systems at 480/600 V. This combination makes it an effective main disconnect for large motors in manufacturing lines, conveyors, pumps, and other heavy-duty equipment requiring robust protection and reliable isolation.
Regular maintenance includes visual inspection of the enclosure and seals, verification that the voltage indicator on the load side is visible, and periodic fuse replacement with Class H fuses as specified. Confirm UL Listed compliance remains intact and perform lockout/tagout procedures during any maintenance to minimize downtime and ensure operator safety.
Key benefits include robust high-current protection, rapid fault clearing with Class H fuses, and a dedicated voltage indicator for quick status checks. The stainless NEMA 4X enclosure extends life in challenging environments, reducing replacement costs while increasing uptime and overall return on investment through safer, faster maintenance and lower unscheduled downtime.