Eaton DH663FDK Heavy Fusible Switch – UL Listed
Part Number: DH663FDK
Quick Summary
Eaton DH663FDK heavy fusible switch provides rugged motor protection for 3-phase equipment in demanding industrial environments. This solution helps prevent costly downtime by delivering precise overcurrent protection within a durable, dust- and vibration-tolerant enclosure. UL Listed certification and a NEMA 12/3R-rated housing support reliable performance in indoor and damp locations, while field-modifiability to NEMA 3R rainproof expands its versatility for outdoor installations. By combining six poles, Class H fuses, and a fusible without neutral configuration, it streamlines wiring and supports scalable motor control. This yields improved uptime, safer shutdowns, and a clear path to regulatory compliance with trusted Eaton components. secondary benefits include compatibility with 240/480/600 V systems and 75 HP maximum ratings.
Product Information
Extended Description
DH663FDK Eaton: Eaton Heavy duty single-throw fused safety switch, 100 A, NEMA 12/3R, Painted galvanized steel, Class H, Fusible without neutral, Six-pole, Six-wire, 600 V, Max Hp: 15-30, 25-60, 30-75 hp (3PH @240, 480, 600 V), 600 V, #14-#1/0 Cu/Al
Product Name
Eaton heavy duty fusible safety switch
Catalog Number
DH663FDK
UPC
782113370507
Product Length/Depth
10.22 in
Product Height
24.95 in
Product Width
15.1 in
Product Weight
40 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
Can be field modified to meetNEMA 3R rainproof requirements when a factory provided drain hole is opened
Enclosure
NEMA 12, NEMA 3R
Enclosure material
Painted galvanized steel
Fuse class provision
Class H
Fuse configuration
Fusible without neutral
Number Of Poles
Six-pole
Number of wires
6
Type
Heavy duty fusible safety switch
Amperage Rating
100A
HP rating - max
15-30, 25-60, 30-75 hp (3PH @240, 480, 600 V)
NEMA rating
NEMA 12/3R
Voltage - max
600 V
Voltage rating
600 V
Product Category
Heavy Duty 6-Pole Motor Circuit Safety Switch
Commercial Distribution, Switching Devices, Volume 2, Tab 1
Eaton Specification Sheet - DH663FDK
Selling Policy 25-000 - Distribution and Control Products and Services
Feature: 100A amperage rating and 600V maximum voltage. Business Impact: Protects large motor circuits while supporting a wide range of industrial applications, reducing the risk of electrical faults and equipment damage. Application: Suitable for six-pole, six-wire motor circuits in packaging lines and manufacturing conveyors. Feature: NEMA 12 / NEMA 3R enclosure with painted galvanized steel construction. Business Impact: Durable, corrosion-resistant housing that withstands dust, moisture, and mechanical stress, lowering maintenance costs. Application: Indoor and damp outdoor environments; drain-hole option enables field modification for rainproof operation. Feature: Class H fuse provision and fusible without neutral configuration. Business Impact: Enhanced short-circuit protection with selective coordination, minimizing nuisance outages and simplifying wiring topologies. Application: Heavy-duty motor control where a neutral is not required. Feature: Six-pole, six-wire design. Business Impact: Simplifies wiring schemes and enables clean, organized field installation, reducing commissioning time. Application: Large three-phase motors up to 75 HP at 600 V. Feature: HP rating flexibility (15–30, 25–60, 30–75 HP at 240/480/600 V). Business Impact: Supports phased upgrades and varying motor sizes without replacing the switch. Application: OEM equipment and retrofit projects requiring scalable motor protection. Feature: UL Listed certification. Business Impact: Verifies compliance with safety standards, accelerating procurement and installation approvals. Application: Industrial facilities requiring certified protection switches.
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FAQs
The DH663FDK supports a 100 A amperage rating with a maximum voltage of 600 V. It is designed for three-phase motors, offering HP ratings of 15–30, 25–60, and 30–75 HP at 240, 480, and 600 V respectively, enabling efficient protection across a range of motor sizes.
The unit uses a NEMA 12 / NEMA 3R enclosure on painted galvanized steel. It can be field modified to meet NEMA 3R rainproof requirements by opening a factory drain hole, expanding suitability for damp or outdoor installations without replacing the enclosure.
Yes, the DH663FDK is UL Listed, providing recognized safety compliance for electrical protection devices. CE or SIL certifications are not listed for this model, but the UL listing, NEMA enclosure ratings, and Class H fuse configuration support regulatory and industry practice in many regions.
The DH663FDK is a six-pole, six-wire heavy-duty fusible safety switch with a fusible configuration that does not require a neutral conductor. This configuration simplifies wiring for standard three-phase motor circuits and helps with organized field installation.
Warranty is Eaton Selling Policy 25-000, offering one year from installation or eighteen months from shipment, whichever occurs first. This provides a solid coverage window for field repairs, replacements, and support through Eaton’s distribution and service network.