Eaton DH665FWK Heavy Duty Fusible Safety Switch - UL Listed
Part Number: DH665FWK
Quick Summary
DH665FWK Eaton heavy duty fusible safety switch provides rugged motor circuit protection for six-pole circuits up to 600 V. This device helps prevent costly downtime by quickly isolating energized equipment during faults, simplifying maintenance workflows, and reducing arc-flash exposure. Key certifications—UL Listed and a NEMA 4X stainless enclosure—affirm safety and reliability, while the Class H fuses and six-pole design support robust control of large motors. For engineering and procurement teams, the 400 A rating and horsepower support (250 hp at 480 V, 350 hp at 600 V) enable scalable protection across a range of industrial applications. Its stainless steel, corrosion-resistant enclosure and compact footprint simplify installation in demanding environments.
Product Information
Extended Description
DH665FWK Eaton: Heavy Duty Safety Switch, Single-Throw, 400A, 600V, Six-pole, Six-wire, Fusible without neutral, NEMA 4X, Stainless steel, Class H fuses, 250 hp at 480 Vac TD 3 Ph, 350 hp at 600 Vac TD 3 Ph
Product Name
Eaton heavy duty fusible safety switch
Catalog Number
DH665FWK
UPC
786685235356
Product Length/Depth
11.2 in
Product Height
57.47 in
Product Width
22.66 in
Product Weight
0.01 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
Stainless steel
Fuse class provision
Class H fuses
Fuse configuration
Fusible without neutral
Number Of Poles
Six-pole
Number of wires
6
Type
Single-Throw
Amperage Rating
400A
HP rating - max
250 at 480 Vac TD 3 Ph, 350 at 600 Vac TD 3 Ph
NEMA rating
NEMA 4X (Stainless)
Voltage rating
600 V
Product Category
Heavy Duty 6-Pole Motor Circuit Safety Switch
Feature: Heavy-duty six-pole fusible switch with Class H fuses and fusible without neutral configuration. Business impact: Robust motor protection with fast fault isolation reduces downtime and protects drives, delivering predictable performance in demanding operations. Application: Ideal for large motors in manufacturing and processing facilities needing reliable overload protection and simplified maintenance. Feature: NEMA 4X stainless steel enclosure for washdown and harsh environments. Business impact: Enhanced durability lowers corrosion risk and service frequency, improving total cost of ownership. Application: Suitable for chemical, food & beverage, and outdoor installations where environmental exposure is a concern. Feature: High amperage and HP ratings (400 A; 250 hp at 480 V, 350 hp at 600 V). Business impact: Scales protection to large motors and drives, reducing equipment damage and improving uptime. Application: Heavy-duty motor control in industrial plants. Feature: Compact enclosure footprint with defined dimensions (11.2 in depth, 22.66 in width, 57.47 in height). Business impact: Eases panel design integration and installation planning, saving space and labor costs. Application: New builds and retrofits in constrained electrical rooms. Feature: UL Listed certification and six-wire configuration. Business impact: Simplifies compliance, procurement, and wiring consistency across sites. Application: Corporate standards-driven projects and regulated facilities.
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FAQs
DH665FWK installs in compatible low voltage power distribution panels rated for 600 V and six-pole motor control. Plan six-wire terminations, connect Class H fuses per manufacturer guidelines, and mount within the NEMA 4X enclosure. Ensure clear isolation, proper labeling, and adherence to UL Listed requirements; verify panel space and accessibility for maintenance.
Key ratings include 400 A amperage, 600 V voltage rating, six-pole configuration, six wires, and single-throw operation. HP capability is 250 hp at 480 V and 350 hp at 600 V under TD 3-phase conditions. It uses Class H fuses with fusible without neutral configuration, ensuring fast fault clearance and reliable motor protection.
Yes, its NEMA 4X stainless steel enclosure withstands washdown, moisture, and contaminants common in industrial plants. The six-pole, fusible design is ideal for large motors and drives, providing robust protection against overload and short circuits in manufacturing, processing, and energy-intensive applications. The UL Listed certification supports compliance in regulated facilities.
The DH665FWK is UL Listed and features a NEMA 4X stainless steel enclosure. It conforms to safety standards for heavy-duty motor control equipment and is designed for outdoor and harsh indoor environments. These certifications simplify procurement by meeting common industry and building code requirements.
Warranty is Eaton’s policy 25-000: one-year from installation or 18 months from shipment, whichever occurs first. The robust six-pole design and Class H fuses reduce downtime by quickly isolating faults, lowering maintenance costs and extending motor life. Expected ROI comes from improved reliability, simplified spares strategy, and predictable performance for large-machine installations.