Eaton DH366NPKLW Heavy Duty Fusible Safety Switch - UL Listed
Part Number: DH366NPKLW
Quick Summary
Eaton heavy duty fusible safety switch protects motor circuits in demanding industrial installations. Facilities struggle with downtime and compliance when switches fail to withstand outdoor exposure, vibration, or wet environments. This model delivers UL Listed protection, a NEMA 4 enclosure, and NEC 230.62 barrier compliance for reliable performance in harsh settings. By leveraging a 600 A rating, a three-pole four-wire configuration, and compatibility with up to 500 hp loads, it reduces spare parts costs and simplifies code compliance. This combination supports longer service life, predictable tripping, and easier maintenance planning for engineers. Designed for integration with existing switchgear and motor controls, it streamlines procurement and installation across manufacturing floors.
Product Information
Extended Description
DH366NPKLW Eaton: Eaton Heavy duty single-throw fused safety switch, Enhanced visible blades, 600 A, NEMA 4, 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
DH366NPKLW
UPC
782114357514
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 4
Enclosure material
Painted 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 4
Voltage rating
600 V
Product Category
Heavy Duty, Fusible with neutral
Feature: 600 A amperage rating. Business Impact: precise protection reduces downtime and extends motor life. Application: heavy-duty motor circuits serving pumps, conveyors, and large manufacturing equipment. Feature: HP rating up to 500 hp (3PH @240/480/600 V). Impact: enables protection for high-power drives without multiple devices. Application: large motors in material handling and process lines. Feature: NEMA 4 enclosure (painted steel). Impact: weather and washdown resistance lowers corrosion risk and maintenance. Application: outdoor substations, exterior switchgear, and outdoor MCCs. Feature: Fuse class provision Class H and fusible with neutral for three-pole four-wire setups. Impact: flexible wiring and safe fault isolation while meeting NEC requirements. Application: plant power distribution with neutrals and large feeders. Feature: Conductor compatibility up to Cu/Al ranges (as listed). Impact: simplifies wiring for diverse feeder configurations and reduces inventory complexity. Application: installations with mixed copper/aluminum feeders and neutrals. Feature: UL Listed and NEC 230.62 barrier compliance. Impact: accelerates approvals and ensures code-ready protection. Application: regulated facilities and projects with strict safety standards. Catalog notes: For 2-pole applications; use outside poles of 3-pole switch. Impact: clear installation guidance prevents improper configurations. Application: retrofits and expansions within existing 3-pole assemblies.
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FAQs
In a 3-pole assembly, the DH366NPKLW uses three live poles with a neutral (four-wire) configuration, delivering complete phase protection and neutral reference. For 2-pole applications, follow the catalog note to use the outside poles of a 3-pole switch, ensuring proper enclosure integrity and safe disconnection. Always verify NEC and local code requirements before integration.
The DH366NPKLW is UL Listed and features a NEMA 4 painted steel enclosure, suitable for indoor and outdoor environments. It also complies with NEC 230.62 barrier requirements, delivering code-compliant protection and safer operation in demanding industrial spaces.
Yes. The device is rated up to 500 hp for three-phase systems at 240, 480, and 600 V, enabling protection of large-motor installations such as pumps, conveyors, and heavy machinery without needing multiple protective devices.
The DH366NPKLW is a three-pole, four-wire fusible switch with neutral. It supports large Cu/Al feeders, including configurations up to 1/0–750 kcmil Cu/Al, matching typical industrial feeder runs. For 2-pole setups, use the outside poles of a 3-pole switch per catalog guidance.
With a robust Class H fuse provision, UL Listed certification, and a NEMA 4 enclosure, the switch delivers reliable protection with long service life and minimal downtime. Fewer nuisance trips, reduced spare parts, and easier code compliance translate to lower total cost of ownership in facilities with high-current motor loads.