Eaton DH661FDKW Heavy Duty Fusible Safety Switch - UL Listed
Part Number: DH661FDKW
Quick Summary
Eaton DH661FDKW is a heavy duty fusible safety switch for reliable motor protection in industrial applications. It helps minimize downtime by delivering rapid disconnection and clear status through an enhanced visible blade. UL Listed certification supports safety compliance, while the NEMA 12/3R enclosure provides protection against dust, splash, and harsh environments. With a six-pole, six-wire design and cartridge fuse configuration, it scales from small to large motor circuits and simplifies field wiring. This combination reduces maintenance cost, improves safety, and aligns with industrial procurement standards, making it a practical choice for panel builders, integrators, and maintenance teams seeking durable, serviceable protection in demanding settings.
Product Information
Extended Description
DH661FDKW Eaton: Eaton Enhanced visible blade single-throw safety switch, Enhanced visible blade, 6 blade, 30 A, NEMA 12/3R, Cartridge, Six-pole, Six-wire, 600 V, Max Hp: 3-7.5, 5-15, 7.5-20 hp (3PH @240, 480, 600 V), 600 V, #14-#2 Cu/Al
Product Name
Eaton heavy duty fusible safety switch
Catalog Number
DH661FDKW
UPC
786680181160
Product Length/Depth
29 in
Product Height
9 in
Product Width
17.5 in
Product Weight
28 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
Heavy Duty Safety Switch (HDSS), w/ Enhanced Visible Blade
Enclosure
NEMA 12, NEMA 3R
Enclosure material
Painted galvanized steel
Fuse class provision
Cartridge
Fuse configuration
Fusible without neutral
Number Of Poles
Six-pole
Number of wires
6
Type
Heavy duty fusible safety switch
Amperage Rating
30A
HP rating - max
3-7.5, 5-15, 7.5-20 hp (3PH @240, 480, 600 V)
NEMA rating
NEMA 12/3R
Voltage - max
600 V
Voltage rating
600 V
Application
Heavy commercial and industrial
Series
K
Feature → Business Impact → Application: The enhanced visible blade provides quick status verification, enabling faster troubleshooting and reduced maintenance downtime in manufacturing lines and distribution centers. This translates to measurable reliability gains and safer disconnections during servicing. Feature → Business Impact → Application: Six-pole, six-wire configuration supports complex motor circuits while maintaining clear wiring layouts and straightforward field installation for panel builders and machine builders. Feature → Business Impact → Application: Cartridge fuse provision simplifies fuse replacement, lowering maintenance time and inventory complexity, ideal for OEMs and service teams managing multiple devices in process plants. Feature → Business Impact → Application: NEMA 12/3R enclosure and painted galvanized steel housing deliver robust protection against dust, moisture, and some chemical exposure, enabling installation in demanding environments without compromising safety. Feature → Business Impact → Application: 600 V maximum rating with 30 A amperage aligns with common industrial motor control requirements, ensuring compatibility with a broad range of drives, starters, and MCCs. Feature → Business Impact → Application: UL Listed certification provides compliance assurance for safety programs, procurement specifications, and regulatory reviews, supporting faster project approvals and installation readiness.
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FAQs
The DH661FDKW is designed for heavy commercial and industrial environments, featuring a six-pole, six-wire configuration in a NEMA 12/3R enclosure. It supports 30A, up to 600 V, and uses cartridge fuses, making it suitable for motor control centers, safety interlocks, and process lines where robust, field-serviceable protection is required.
Wire connections follow the six-wire, six-pole arrangement, with cartridge fuses providing protection for each circuit. The device is fusible without neutral, and the enclosure accommodates NEMA 12/3R environmental protection. Ensure proper grounding and follow manufacturer wiring diagrams in the Eaton spec sheet to maintain safe, code-compliant operation.
Yes, the DH661FDKW is UL Listed. This certification indicates the product has been tested for safety and meets recognized standards, supporting safer operation, easier vendor qualification, and faster approval in safety and compliance audits within industrial facilities.
Yes. The HP rating max is specified as 3-7.5, 5-15, 7.5-20 hp for 3-phase systems at 240, 480, and 600 V, making it suitable for a wide range of motor sizes within industrial equipment and machinery, provided the system voltage and current align with the 600 V and 30 A ratings.
The DH661FDKW uses a NEMA 12, 3R enclosure made of painted galvanized steel, delivering dust and splash protection suitable for indoor and semi-outdoor installations in demanding environments. This enclosure, combined with UL Listing, supports safer operation and easier maintenance in motor control and utility applications.