Eaton DH366NDKLW Heavy Duty Fusible Switch - UL Listed
Part Number: DH366NDKLW
Quick Summary
Eaton heavy duty fusible safety switch DH366NDKLW protects motor circuits in industrial facilities. Many panel builders struggle with safe, code-compliant maintenance and reliable fault isolation in harsh environments. UL Listed, NEC 230.62 (C) compliant barrier, and a NEMA 12/3R enclosure provide strong protective standards for demanding installations. This 3-pole, four-wire design with Class H fusing and a neutral connection supports high amperage and diverse motor loads, delivering consistent performance in 600 V systems. By choosing this switch, engineers gain faster installation, higher reliability, and reduced long-term maintenance costs through robust protection and standardized wiring schemes.
Product Information
Extended Description
DH366NDKLW Eaton: Eaton Heavy duty single-throw fused safety switch, Enhanced visible blades, 600 A, NEMA 12/3R, Class H, 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
DH366NDKLW
UPC
782114196489
Product Length/Depth
12.75 in
Product Height
63 in
Product Width
23 in
Product Weight
203 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
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
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, Fusible with neutral
Feature → Business Impact → Application: 600 A and 600 V rating with 3-pole, four-wire configuration and neutral support enables reliable protection for large motors up to 200, 400, or 500 hp at standard industrial voltages; reduces nuisance tripping and improves uptime in high-load processes. This translates to fewer unplanned downtime events in manufacturing lines, pumps, and conveyors. Feature → Robust enclosure: NEMA 12 and NEMA 3R construction with painted galvanized steel offers corrosion resistance and weather-tolerant performance, enabling indoor and outdoor installation in damp or dusty environments. Application: outdoor substations, process plants, and mining facilities where protective enclosures are essential. Feature → UL Listed and NEC 230.62 barrier compliance ensures regulatory conformity and safer maintenance practices; reduces compliance risk and accelerates audits. Application: facilities requiring strict electrical codes. Feature → Class H fuse provision with neutral enables precise fault isolation and arc fault mitigation; supports safe servicing and lower total cost of ownership. Application: heavy-duty motor drives and large motors. Feature → Three-pole, four-wire design plus neutral ensures flexible wiring and compatibility with mixed-load systems; simplifies design and stock management. Application: retrofit projects and new panel builds. Feature → Compatible with 2-pole applications by using the outer poles of a 3-pole switch per catalog notes; offers installation flexibility and cost savings. Application: control panels with space constraints or staged protection schemes.
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FAQs
DH366NDKLW is designed for heavy motor protection in industrial environments. It supports up to 600 A and 600 V with a 3-pole, four-wire configuration and neutral, suitable for large motors up to 200, 400, and 500 hp on 3-phase systems. Ideal for manufacturing lines, pumps, conveyors, and process equipment where reliable fault isolation is critical.
This switch is UL Listed and complies with NEC 230.62 barrier requirements, ensuring code-compliant installation. The enclosure is rated for NEMA 12 and NEMA 3R, providing protection appropriate for indoor and outdoor use. The fuse class is Class H, aligning with industry standards for high-reliability motor protection.
DH366NDKLW is fusible with neutral and configured as a four-wire device. This arrangement enables independent neutral return paths for certain loads, simplifies control wiring, and supports 3P4W motor circuits while maintaining safe, isolated faults and straightforward panel wiring.
Plan for its dimensions and weight: 12.75 in depth, 23 in width, 63 in height, and 203 lb. Mount in a suitable enclosure with a compatible bus and conductor sizes; ensure 600 V insulation, proper grounding, and adherence to NEC requirements. If you’re retrofitting, note the catalog guidance for 2-pole configurations using outer poles of a 3-pole unit.
Eaton provides a warranty per policy 25-000: one year from installation or 18 months from shipment, whichever occurs first. This covers manufacturing defects and material reliability. For service, replacement parts, and technical assistance, contact Eaton support or your authorized distributor to ensure prompt, informed help.