Eaton DH326NPKLW Heavy Duty Fusible Safety Switch - NEMA 4
Part Number: DH326NPKLW
Quick Summary
Eaton DH326NPKLW heavy duty fusible safety switch provides reliable overcurrent protection for industrial machinery and distribution panels. Engineers and maintenance teams often struggle with ingress protection, wiring errors, and regulatory gaps during switch installations, which can lead to downtime and costly rework. This unit carries UL Listed certification and a NEMA 4 enclosure, plus NEC 230.62 barrier compliance to perform in harsh environments while supporting safe, compliant operation. With a 600 A rating at 240 V, four-wire capability, and a fusible path with neutral, it delivers robust protection with installation flexibility. For asset-intensive facilities, this translates to fewer interruptions, faster serviceability, and long-term protection of motors and feeders while aligning with procurement and safety objectives.
Product Information
Extended Description
DH326NPKLW Eaton: Eaton Heavy duty single-throw fused 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
DH326NPKLW
UPC
782114357293
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
75, 200 hp (3PH @Std, TD))
NEMA rating
NEMA 4
Voltage rating
240V
Product Category
Heavy Duty, Fusible with neutral
Feature: 600 A amperage rating with three-pole, four-wire configuration enables primary protection for large motors and feeders. Business Impact: Reduces the risk of nuisance trips and motor damage, enabling higher uptime and lower maintenance costs. Application: Ideal for industrial drive systems and distribution panels where 200 hp motor loads are common. Feature: Enhanced visible blade for quick status checks. Business Impact: Speeds troubleshooting and lock-out verification, decreasing maintenance time and exposure to risk. Application: Field start-ups and routine inspections in harsh environments. Feature: NEMA 4 enclosure with painted steel construction. Business Impact: Delivers weather resistance and ingress protection for indoor/outdoor installations, lowering enclosure-related failure rates. Application: Outdoor substations, equipment pads, and washdown areas. Feature: Fuse class provision Class H and neutral fusible configuration. Business Impact: Provides aligned protection for neutral conductors and clean fault isolation, reducing arc-flash exposure during maintenance. Application: Four-wire systems requiring neutral protection in heavy-duty switchgear. Feature: UL Listed certification and NEC 230.62 barrier compliance. Business Impact: Ensures regulatory conformity and easier safety audits, supporting procurement and risk management. Application: Facilities with strict electrical safety programs and commissioning requirements. Feature: Compact footprint with 12.75 in depth and 23 in width. Business Impact: Facilitates retrofit or new installs in tight electrical rooms, enabling flexible panel layouts. Application: Industrial control rooms and service bays where space is at a premium.
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FAQs
Prepare a compliant enclosure space with a NEMA 4 rating for outdoor or washdown areas. Route four wires with a neutral in the designated terminal block, verify Class H fuse compatibility, and follow NEC 230.62 barrier guidelines. Use the enhanced visible blade to confirm switch position during commissioning for a safe, compliant start-up.
The 600A rating accommodates heavy feeders and motors up to 200 hp in typical three-phase services, allowing appropriately sized conductors to minimize voltage drop and thermal stress. Ensure conductors meet ampacity requirements and use properly rated fuses to maintain protection without nuisance trips during peak loads.
Yes. The NEMA 4 enclosure and painted steel construction are designed for outdoor and harsh indoor environments, resisting ingress and weather effects while maintaining electrical integrity. For outdoor install, ensure proper mounting, drainage, and protection from direct exposure to severe weather to maximize longevity.
This switch is UL Listed and NEC 230.62 barrier compliant, with a NEMA 4 enclosure standard for weather resistance. These certifications support safer commissioning, regulatory compliance, and easier qualification during system audits and procurement reviews.
Expect reduced downtime due to the Enhanced Visible Blade for quick status checks, straightforward neutral fusible wiring for reliable fault isolation, and durable enclosure protection that lowers environmental wear. Combined with Eaton's warranty, these features contribute to longer service intervals and lower lifecycle costs.