Eaton DH663FWK Heavy Duty Fusible Safety Switch - NEMA 4X
Part Number: DH663FWK
Quick Summary
Eaton DH663FWK Heavy Duty Fusible Safety Switch provides rugged motor circuit protection for industrial equipment. Facilities often struggle with durable enclosures, reliable fusing, and uptime in harsh washdowns and dusty environments. UL Listed certification and a NEMA 4X stainless enclosure deliver compliance and longevity, while the Class H fuse configuration supports safe, selective protection. With its six-pole, six-wire design and high horsepower ratings, it also reduces wiring complexity and supports efficient motor control across TD 3-phase systems, delivering measurable improvements in reliability and maintenance planning for demanding applications.
Product Information
Extended Description
DH663FWK Eaton: Heavy Duty, Motor Circuit Safety Switch, Single-Throw, 100A, 600V, Six-pole, Six-wire, Fusible without neutral, NEMA 4X, Stainless steel, Class H fuses, 30 hp at 240 Vac TD 3 Ph, 60 hp at 480 Vac TD 3 Ph, 75 hp at 600 Vac TD 3 Ph
Product Name
Eaton heavy duty fusible safety switch
Catalog Number
DH663FWK
UPC
786685235349
Product Length/Depth
10.22 in
Product Height
24.95 in
Product Width
10.76 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
100A
HP rating - max
30 at 240 Vac TD 3 Ph, 60 at 480 Vac TD 3 Ph, 75 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 → Business Impact → Application: The DH663FWK uses a six-pole, six-wire configuration rated for 100 A at 600 V, enabling robust motor circuit protection for medium to large motors. This translates into reduced fault propagation and longer motor life in continuous-operation lines such as conveyors and pumps in manufacturing plants. Application: motor control centers and packaged systems in food & beverage, chemical, and water treatment facilities. Feature → Business Impact → Application: The NEMA 4X stainless steel enclosure provides exceptional corrosion and washdown resistance, lowering maintenance costs and extending service life in harsh environments. Application: outdoor installations, coastal facilities, and sanitation-driven industries. Feature → Business Impact → Application: Fusible without neutral wiring simplifies installation while maintaining safety, enabling quicker commissioning and easier future fuse changes. Application: new builds and retrofit projects across TD 3Ph motor circuits. Feature → Business Impact → Application: Class H fuses paired with precise horsepower ratings (30 HP @ 240 VAC TD 3Ph, 60 HP @ 480 VAC TD 3Ph, 75 HP @ 600 VAC TD 3Ph) deliver selective protection and fast fault isolation, reducing unplanned downtime. Application: high-demand pump and fan systems in process industries. Feature → Business Impact → Application: UL Listed certification and compact dimensions support regulatory compliance and easier integration into existing switchgear footprints. Application: panel builders and maintenance teams seeking verified protection with simplified sourcing. Warranty and support: The product ships with Eaton’s standard warranty policy (25-000), offering one year from installation or eighteen months from shipment, whichever occurs first. Application: ongoing service planning and asset management.
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FAQs
The DH663FWK is designed for motor circuit protection in industrial environments where reliability and enclosure protection matter. It delivers 100 A at up to 600 V with a six-pole, six-wire configuration and fusible protection via Class H fuses within a NEMA 4X stainless enclosure. Typical uses include conveyors, pumps, fans, and centralized motor control panels in washdown or outdoor locations.
Key specifications include a 100 A amperage rating, 600 V voltage rating, six poles and wires, fusible without neutral configuration, Class H fuses, and horsepower ratings of 30 HP at 240 VAC TD 3Ph, 60 HP at 480 VAC TD 3Ph, and 75 HP at 600 VAC TD 3Ph. It also features a UL Listed status and a NEMA 4X stainless enclosure.
Yes, the DH663FWK is UL Listed and designed with a NEMA 4X enclosure in stainless steel. This combination provides verified electrical safety compliance and superior protection against corrosion and washdown environments, making it suitable for demanding industrial facilities and outdoor installations.
The six-pole, six-wire configuration simplifies wiring for motor circuits and supports straightforward integration into existing switchgear. It enables reliable isolation and protection for multi-line motor loads, reducing commissioning time and maintenance complexity while enabling easier troubleshooting in complex drive and pump systems.
The DH663FWK is covered by Eaton’s standard warranty policy 25-000, offering one year from the date of installation or eighteen months from shipment, whichever occurs first. This provides a defined window for performance verification and streamlined access to Eaton support and replacement parts.