Eaton DH365FWK Heavy Duty Fusible Safety Switch - NEMA 4X
Part Number: DH365FWK
Quick Summary
The Eaton DH365FWK heavy duty fusible safety switch provides rugged overcurrent protection for industrial power distribution. A common pain point is difficult fault isolation and lengthy downtime in harsh facilities. UL Listed certification and a NEMA 4X stainless enclosure offer trusted reliability in demanding environments; the Class H fuse and three-pole design support scalable protection. Designed for service entrances and motor loads, it integrates with lug kits for flexible installation. With 400 A capacity and 600 V rating and compatibility with large Cu/Al conductor sizes, it aligns with modern industrial control architectures. This combination delivers reliability, reduced maintenance, and straightforward procurement for electrical protection and circuit control.
Product Information
Extended Description
DH365FWK Eaton: Eaton Enhanced visible blade single-throw safety switch, 400 A, NEMA 4X, 304 stainless steel, Class H, Three-pole, Three-wire, 600 V, Max Hp: 250, 350 hp (3PH @480/600 V), (2)#1/0-(2)300 kcmil; or (1)#1/0-(1)750 kcmil Cu/Al
Product Name
Eaton heavy duty fusible safety switch
Catalog Number
DH365FWK
UPC
782114357378
Product Length/Depth
57 in
Product Height
11 in
Product Width
27 in
Product Weight
133 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
Catalog Notes
Suitable for service entrance use with a neutral or ground lug kit installed
Enclosure
NEMA 4X
Enclosure material
304 stainless steel
Fuse class provision
Class H
Fuse configuration
Fusible without neutral
Number Of Poles
Three-pole
Number of wires
3
Type
Heavy duty fusible safety switch
Amperage Rating
400A
HP rating - max
250, 350 hp (3PH @480/600 V)
NEMA rating
NEMA 4X (Stainless)
Voltage rating
600 V
Product Category
Heavy Duty, Fusible without neutral
Commercial Distribution, Switching Devices, Volume 2, Tab 1
Eaton Specification Sheet - DH365FWK
Selling Policy 25-000 - Distribution and Control Products and Services
The 400A amperage rating with a 600 V maximum voltage rating provides robust protection for motor loads and feeders. This capability translates into reliable, code-compliant switching for high-demand lines in manufacturing and processing facilities. The NEMA 4X enclosure is constructed from 304 stainless steel for superior corrosion resistance. That resilience reduces maintenance downtime in outdoor, washdown, or harsh industrial environments while maintaining safe access. Class H fusing and a fusible without neutral configuration support selective protection and straightforward wiring. Three-pole, three-wire design keeps installation tidy and enables clean coordination with downstream protection devices. UL Listed certification confirms compliance with recognized safety standards for industrial protection equipment. Catalog notes indicate suitability for service entrance use when a neutral or ground lug kit is installed, expanding installation options. With a 57 inch depth, 27 inch width, and 11 inch height, the unit fits standard electrical enclosures and spaces. Weight of 133 lb and a rugged enclosure support easier handling during installation and service.
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FAQs
For proper installation, plan around the 57 in depth, 27 in width, and 11 in height, and ensure adequate clearance for maintenance. It supports service entrances with a neutral or ground lug kit and uses a three-pole, fusible configuration suitable for 600 V systems. Verify conductor sizes from 2/0 to 750 kcmil Cu/Al, and secure the enclosure to a suitable surface per local codes.
Key specifications include a 400 A amperage rating, a 600 V voltage rating, and a maximum horsepower rating of 250 to 350 hp for three-phase loads at 480/600 V. It uses Class H fuses, is fusible without a neutral, and features three poles with three wires. The device is UL Listed and designed for NEMA 4X environments.
Yes. The DH365FWK uses a NEMA 4X enclosure crafted from 304 stainless steel, offering excellent corrosion resistance for outdoor and washdown environments. This makes it well-suited for service entrances where exposure to moisture, dust, and chemicals is a concern, while maintaining safe switching and fault isolation.
The DH365FWK is UL Listed, confirming compliance with recognized safety standards for industrial protection equipment. It is also specified for service entrance use with the option of a neutral or ground lug kit installed, which expands installation flexibility. These certifications support regulatory compliance in utility connections and industrial facilities.
The 304 stainless steel NEMA 4X enclosure minimizes corrosion-related maintenance in harsh environments, reducing downtime and replacement costs. With a robust 400 A, 600 V design and long service life, facilities can achieve lower lifecycle costs and greater equipment availability, improving overall return on investment for critical power protection.