Eaton DH326NPKW Heavy Duty Fusible Safety Switch - UL Listed, NEMA 4
Part Number: DH326NPKW
Quick Summary
The Eaton DH326NPKW heavy duty fusible safety switch protects 600A, 240V industrial circuits in demanding equipment rooms. In busy facilities, downtime and maintenance risks spike when isolation and fault protection aren’t reliable. UL Listed certification, a rugged NEMA 4 enclosure, and fusible-with-neutral provisions reinforce safety and compliance in harsh environments. The unit’s 3-pole, four-wire design supports straightforward integration into control panels and motor feeders. By delivering robust protection with clear maintenance pathways, this switch helps unlock longer equipment life, reduced spare parts inventory, and predictable performance in manufacturing, water treatment, and material handling applications.
Product Information
Extended Description
DH326NPKW Eaton: Eaton Enhanced visible blade single-throw safety switch, Enhanced visible blade, 600 A, NEMA 4, Painted steel, Neutral, Three-pole, Four-wire, 240 V, Max Hp: 75, 200 hp (3PH @Std, TD)), (1)#2-(1)600 kcmil and (1)#1/0-(1)750 kcmil Cu/Al
Product Name
Eaton heavy duty fusible safety switch
Catalog Number
DH326NPKW
UPC
782114357316
Product Length/Depth
14.25 in
Product Height
63 in
Product Width
24 in
Product Weight
163 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
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
75, 200 hp (3PH @Std, TD))
NEMA rating
NEMA 4
Voltage rating
240V
Product Category
Heavy Duty, Fusible with neutral
Feature → Business Impact → Application: The DH326NPKW delivers a 600A amperage rating in a three-pole, four-wire configuration with fusible protection and a neutral. This enables precise fault isolation for large motors and feeders, reducing unplanned downtime and preventing collateral damage in critical lines. Application-wise, it’s ideal for motor control centers, substations, and heavy-duty process lines where reliable disconnection is non-negotiable. Feature → Business Impact → Application: The NEMA 4 enclosure, painted steel construction, and weather/washdown resistance translate to durable performance in outdoor or damp environments. This reduces enclosure-related failures and maintenance costs while expanding deployment options to outdoor substations and parking lot feeders. Feature → Business Impact → Application: Fusible with neutral support and Class H fuse provisions improve protection coordination and swap-out speed during maintenance. This minimizes service interruptions and improves safety during fuse replacements in high-load circuits found on conveyors and presses. Feature → Business Impact → Application: Terminal capacity accommodates large feeds—up to #2 to 600 kcmil and #1/0 to 750 kcmil Cu/Al—allowing flexible wiring and simplified installation. This lowers labor costs, simplifies upgrades, and supports future load growth in industrial plants. Feature → Business Impact → Application: The unit’s substantial footprint (63 in high, 24 in wide, 14.25 in deep) and 163 lb weight provide a stable, vibration-resistant installation in crowded switchgear rooms. This reduces misalignment risks and enables secure mounting in new or retrofit projects for heavy-duty protection. Feature → Business Impact → Application: Eaton’s warranty (one year from installation or eighteen months from shipment) adds long-term value and service confidence, while UL Listed status reinforces compliance across industrial panels and meets safety procurement criteria in regulated environments. This is particularly valuable for capital projects and maintenance contracts in manufacturing, mining, and processing facilities.
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FAQs
The DH326NPKW supports a three-pole, four-wire configuration with a neutral, enabling safe isolation of large motor feeders and control circuits. It accepts heavy conductors and is designed for straightforward field wiring, with clear terminal access for #2 to 600 kcmil and #1/0 to 750 kcmil Cu/Al. Always observe the catalog note that for 2-pole applications, use the outside poles of a 3-pole switch.
Key specifications include a 600A amperage rating, 240V voltage rating, and a maximum HP of 75 HP (standard) or up to 200 HP in 3-phase TD configurations. It is a fusible switch with neutral (4-wire), Class H fuse provision, and UL Listed certification, making it suitable for heavy-duty industrial loads and motor protection in demanding environments.
Yes. The unit features a NEMA 4 rated enclosure with painted steel construction, designed to resist moisture, dust, and washdowns. This makes it appropriate for outdoor installations and harsh indoor environments where reliable protection of switchgear is required, reducing maintenance downtime and extending service life.
Maintenance considerations include timely fuse replacement using Class H fusible elements and periodic inspection of connections, enclosure seals, and mechanical latching. The device is UL Listed, with a 1-year warranty from installation or 18 months from shipment. Its robust construction and clear catalog notes help streamline preventive maintenance and spare-part planning.
Verify the 3-pole, 4-wire design with neutral, 240V rating, and 600A capacity against your system requirements. Check the enclosure size (63 in high, 24 in wide, 14.25 in deep) and the terminal capacities (up to 600 kcmil copper/aluminum) to ensure wiring compatibility. Also confirm the need for 2-pole configurations using the outside poles per catalog notes.