Eaton DH366NDKW2 Heavy Duty Fusible Safety Switch - UL 98
Part Number: DH366NDKW2
Quick Summary
DH366NDKW2 heavy duty fusible safety switch provides reliable isolation for three-phase power systems in industrial facilities. When downtime and nuisance fuse changes bite into project schedules, this switch delivers rugged construction and simplified maintenance. UL 98 certification, NEC 230.62 barrier compliance, and a NEMA 12/3R enclosure ensure safe, code-compliant isolation across harsh environments. With a 600 A rating and 600 V capability, it scales to large panels, while the neutral conductor supports 4-wire systems. Designed for panel builders and maintenance teams, it supports compliant installation and long-term reliability, reducing lifecycle costs and improving uptime in manufacturing and processing environments.
Product Information
Extended Description
DH366NDKW2 Eaton: Eaton Heavy duty single-throw fused safety switch, Enhanced visible blades, 600 A, NEMA 12/3R, H fuses, Neutral, Three-pole, Four-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
DH366NDKW2
UPC
786679163375
Product Length/Depth
63 in
Product Height
14.25 in
Product Width
24 in
Product Weight
168 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 98
Catalog Notes
For 2-pole applications; use outside poles of 3-pole switch
Enclosure
NEMA 12, NEMA 3R
Enclosure material
Painted galvanized steel
Fuse class provision
Class H
Fuse configuration
Fusible with neutral
Number Of Poles
Three-pole
Number of wires
4
Type
Heavy duty fusible safety switch
Wire size
(1) #2 AWG-600 kcmil, (1) #1/0 AWG-750 kcmil
Amperage Rating
600A
HP rating - max
200, 400, 500 hp (3PH @240,480,600 V)
NEMA rating
NEMA 12/3R
Voltage - max
600 V
Voltage rating
600 V
Product Category
Heavy Duty, Fusible with neutral
Feature → Business Impact → Application: 600 A amperage rating enables reliable isolation of high-load industrial circuits, reducing the risk of arcing and unplanned downtime while supporting scalable HP ratings up to 200, 400, or 500 hp for three-phase systems. In practice, this means fewer nuisance trips and quicker maintenance cycles for large motor loads in manufacturing lines. Application: large industrial panels and motor control centers. Feature → Business Impact → Application: Fusible with neutral configuration adds a clear electrical path for safe switching and coordinated protection, enabling 4-wire connections that simplify control wiring and improve fault-clearing performance. Application: systems requiring neutral awareness, such as mixed-voltage drives. Feature → Business Impact → Application: NEMA 12/3R enclosure with painted galvanized steel provides robust enclosure integrity in dusty, humid, or corrosive plant environments, reducing enclosure-related downtime and extending service life. Application: processing plants, water treatment, and chemical facilities. Feature → Business Impact → Application: Class H fuse provision and heavy duty construction deliver dependable fuse operation and extended component life, lowering replacement costs and maintenance intervals. Application: HAC and large-machinery protection. Feature → Business Impact → Application: 63 in product length, 24 in width, and 14.25 in height along with 168 lb weight support straightforward installation in standard electrical rooms and conform to space-constrained layouts. Application: retrofits and new installations with tight footprints. Feature → Business Impact → Application: For 2-pole configurations, use outside poles of 3-pole switches per catalog notes, enabling flexible integration into existing panels without expensive rewiring. Application: panel modernization and expansion. Throughout, this device aligns with industry-standard protection devices in electrical protection and circuit control, offering reliable compliance with NEC 230.62 barriers and UL 98 certification while delivering measurable improvements in safety, uptime, and total cost of ownership.
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FAQs
Plan for a three-pole, four-wire enclosure with a NEMA 12/3R rating. The device is 63 inches long, 24 inches wide, and 14.25 inches high, weighing 168 lb, requiring mounting space and clearance for wiring. For 2-pole installations, follow the catalog note to use the outside poles of a 3-pole switch to simplify integration.
Yes. It is a three-pole, four-wire fusible safety switch rated for up to 600 A and 600 V. It supports maximum horsepower of 200, 400, or 500 hp for 3-phase applications at 240/480/600 V, enabling scalable protection for motor drives and large loads.
The unit carries UL 98 certification for safety, NEC 230.62 barrier compliance for safe installations, and a NEMA 12/3R enclosure designation, ensuring suitability for standard industrial environments and code conformance.
The switch uses Class H, fusible with neutral protection, designed for reliable fuse operation in heavy-duty service. Regular inspection of neutral connections and fuse elements, plus adherence to installation clearances, helps maintain performance and minimize downtime.
It offers enhanced safety with robust enclosure protection, reduces downtime through reliable high-current isolation, supports scalable motor protection, and helps lower lifecycle costs via longer fuse life and easier maintenance in harsh environments.