Eaton DD365NDKW Double Door Safety Switch - UL Listed
Part Number: DD365NDKW
Quick Summary
The Eaton DD365NDKW fused safety switch isolates power for 3‑phase electrical systems in manufacturing and processing lines. It addresses the challenge of safe de-energization under heavy loads and neutrals coordination in 4‑wire, 600 V systems. UL Listed safety certification supports compliance while the enclosure offers dust-tight NEMA 12 and weather-resistant NEMA 3R protection. Designed for industrial protection, this heavy-duty switch integrates with standard control panels to improve uptime and reduce maintenance costs. Its three-pole, four-wire design with neutral and fusible links aligns with common industrial code requirements, enabling straightforward installation. In practice, engineers value the combination of high amperage capability up to 400 A and HP ratings up to 350 hp at 480/600 V for motor protection.
Product Information
Extended Description
DD365NDKW Eaton: Eaton Double door single-throw fused safety switch, 400 A, NEMA 12/3R, Class H, Fusible with neutral, Three-pole, Four-wire, 600 V, Max Hp: 250, 350 hp (3PH @480/600 V), (2)#1/0(1)#1/0-(2)300 kcmil-#1/0, or (1)175 kcmil-#1/0
Product Name
Eaton double door single-throw fused safety switch
Catalog Number
DD365NDKW
UPC
786679184622
Product Length/Depth
16.41 in
Product Height
24.32 in
Product Width
72.46 in
Product Weight
219 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 12, NEMA 3R
Enclosure material
Painted galvanized steel
Fuse configuration
Fusible with neutral
Number Of Poles
Three-pole
Number of wires
4
Type
Heavy duty double door safety switch
Amperage Rating
400A
Fuse class provision
Class H
HP rating - max
250, 350 hp (3PH @480/600 V)
Voltage rating
600 V
Product Category
Dust tight
Special features
w/ window
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Eaton Specification Sheet - DD365NDKW
Feature: 400A amperage rating with max horsepower up to 350 hp (3PH @480/600 V). Business Impact: Supports heavy motors directly, reducing the need for additional protective devices and simplifying wiring. Application: Suitable for large motor feeds in manufacturing lines and processing equipment. Feature: NEMA 12 and NEMA 3R enclosures with painted galvanized steel. Business Impact: Provides reliable dust, moisture, and weather resistance, lowering maintenance costs in harsh environments. Application: Plant floors, outdoor facilities, and wash-down areas where protection matters. Feature: Fusible with neutral and Class H fuse provision. Business Impact: Helps achieve selective coordination and safe fault clearing, improving operator safety and system reliability. Application: Motor control centers and distribution panels with neutral requirements. Feature: Three-pole, four-wire configuration. Business Impact: Standardizes integration with common 3PH power distribution and facilitates neutral return paths. Application: Industrial control panels and main switchgear in mixed-use facilities. Feature: 600 V voltage rating and 219 lb weight. Business Impact: Compatible with typical industrial voltage levels while maintaining robust mechanical design for reliable service life. Application: Heavy-duty industrial installations requiring durable, compliant protection. Feature: Window access for fuse status and UL-listed certification. Business Impact: Quick status checks reduce downtime and simplify routine maintenance. Application: Maintenance routines and safety audits in high-demand environments.
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FAQs
The DD365NDKW is a three-pole, four-wire fused safety switch designed for 600 V three-phase systems. Mounting should align with standard electrical enclosures, using the NEMA 12/3R-rated cabinet for dust and weather resistance. Wire connections should implement neutral where required, with Class H fuses sized to protect the motor load, and ensure standard torque specifications for bolts and lugs are followed during installation.
The device supports up to 350 hp for motors connected at 480/600 V in a three-phase configuration, with a 400 A amperage rating. It is designed for 600 V operation and is compatible with heavy-duty industrial motors found in packaging, metal fabrication, and material handling applications.
Yes, the DD365NDKW carries UL Listed certification and uses a NEMA 12, NEMA 3R enclosure. This combination provides dust-tight and weather-resistant protection, making it suitable for both indoor dusty environments and partially outdoor installations where moisture resistance is needed.
Warranty is Eaton Selling Policy 25-000, covering one year from installation or eighteen months from shipment, whichever occurs first. For maintenance, use the window to monitor fuse status, inspect neutral connections, and verify fuse integrity. Routine checks help prevent unexpected faults and support sustained performance in high-demand environments.
The unit’s three-pole, four-wire configuration with neutral aligns with standard industrial control schemes. Its fusible with neutral design and Class H fuses support selective coordination, reducing fault impact and improving safety clearances. The enclosure’s NEMA ratings and UL Listing simplify compliance, while the inline window aids status checks during commissioning and maintenance.