Eaton DH366FDK-GCL Heavy Duty Fusible Switch - UL Listed
Part Number: DH366FDK-GCL
Quick Summary
DH366FDK-GCL is a heavy-duty fusible switch designed for safe electrical isolation in mill-duty motor circuits. This unit helps engineering teams achieve reliable shutdowns even in dusty, harsh environments. UL Listed certification, NEC 230.62 barrier compliance, and a rugged NEMA 12/3R enclosure provide proven protection against dust and moisture while enabling field modifications for rainproof operation and service-entrance configurations. The three-pole, 600 V design supports high-horsepower motors with Class H fusing, reducing nuisance fuse trips and downtime. Combined with Eaton's durable construction and warranty support, it delivers predictable performance, simplified compliance documentation, and a scalable solution for future plant upgrades. The product integrates smoothly with Eaton’s broader protection ecosystem for safer, more efficient electrical distribution.
Product Information
Extended Description
DH366FDK-GCL Eaton: Eaton Heavy duty single-throw fused safety switch, Mill-duty, dust-tight, 600 A, NEMA 12/3R, Class H, Three-pole, Three-wire, 600 V, Max Hp: 200, 400, 500 hp (3PH @240,480,600 V), (1)#2-(1)600 kcmil; and (1)#1/0-(1)750 kcmil Cu/Al
Product Name
Eaton heavy duty fusible safety switch
Catalog Number
DH366FDK-GCL
UPC
782114889886
Product Length/Depth
12.75 in
Product Height
63 in
Product Width
23 in
Product Weight
160 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.
Compliances
NEC 230.62 (C) Compliant Barrier
Certifications
UL Listed
Catalog Notes
Suitable for service entrance use with a Neutral Kit installed. Can be field modified to meet NEMA 3R rainproof requirements when a factory provided drain hole is opened. Use outside poles of three-pole switch for two-pole applications.
Enclosure
NEMA 12, NEMA 3R
Enclosure material
Painted galvanized 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
600A
HP rating - max
200, 400, 500 hp (3PH @240,480,600 V)
NEMA rating
NEMA 12/3R
Voltage rating
600 V
Product Category
Heavy Duty, Mill-duty
Commercial Distribution, Switching Devices, Volume 2, Tab 1
Eaton Specification Sheet - DH366FDK-GCL
Selling Policy 25-000 - Distribution and Control Products and Services
Amperage and horsepower handling: The DH366FDK-GCL is rated at 600 A with max horsepower options of 200, 400, and 500 hp at 240, 480, and 600 V. Business impact includes the ability to drive large motors with robust protection, reducing nuisance trips and extending motor life in demanding applications like conveyors and pumps. This translates to fewer downtime events and improved overall equipment effectiveness in manufacturing lines. Enclosure and environmental resilience: Encased in painted galvanized steel with NEMA 12/3R ratings, the switch delivers dust-tight and weather-protected performance suitable for indoor and exterior installations. Application in dusty production floors and outdoor spaces becomes more reliable, lowering maintenance costs and safeguarding personnel. Fuse configuration and protection: Fusible without neutral with Class H fuse provision offers precise short-circuit protection and coordination for heavy loads. In practice, this supports safer shutdown sequences and easier coordination with upstream protection schemes, boosting compliance and fault isolation. Installation flexibility and service options: Three-pole, three-wire design at 600 V supports straightforward feeder layouts, and field modifications enable rainproof NEMA 3R operation when a factory drain hole is opened. A Neutral Kit option enables service-enterance use, simplifying integration into existing electrical infrastructure and reducing field install time. Size, weight, and compatibility: At 63 in height, 23 in width, and 12.75 in depth weighing 160 lb, this unit fits standard industrial footprints and aligns with Mill-duty control panels, minimizing enclosure redesigns and facilitating retrofits. Warranty and support: Backed by Eaton’s policy, the 25-000 warranty offers coverage for one year from installation or 18 months from shipment, reinforcing total-cost-of-ownership advantages for procurement and maintenance teams.
Get a Quick Quote for a Eaton DH366FDK-GCL
Chat with us on WhatsApp - fast responses guaranteed
Need to speak with someone? We'll call you back within 2 hours during business hours
Interested in Eaton DH366FDK-GCL?
Enquire Now
FAQs
The DH366FDK-GCL can be field modified to meet NEMA 3R rainproof requirements when a factory-provided drain hole is opened. For two-pole applications, use the outside poles of the three-pole switch. This approach preserves essential protection while simplifying wiring and panel integration, reducing retrofit costs and installation time.
Yes. The unit is UL Listed and NEC 230.62 barrier compliant, providing recognized safety certification and clear integration guidance for service entrances and protective barriers. This helps facilities meet regulatory requirements and maintain safe operating practices across motor-control centers.
This switch supports 600 A and up to 500 hp for three-phase motors at 240/480/600 V. It is designed for heavy-duty mill-duty applications, delivering reliable short-circuit protection and capable motor isolation for large equipment such as conveyors, pumps, and presses.
The enclosure is rated NEMA 12 and NEMA 3R, made of painted galvanized steel. This combination provides dust-tight protection and rainproof capability when modified in the field, enabling both indoor and outdoor installations without compromising insulation or safety.
Eaton’s Selling Policy 25-000 applies, offering a one-year warranty from installation or eighteen months from shipment, whichever occurs first. This policy supports long-term maintenance planning and reduces total cost of ownership while ensuring access to Eaton’s service and documentation for compliance.