Eaton DH321NWK316 Heavy Duty Fusible Safety Switch-NEMA 4X
Part Number: DH321NWK316
Quick Summary
Eaton heavy duty fusible safety switch provides rugged power isolation for industrial control panels. Operators and maintenance teams often struggle with corrosion, moisture, and costly downtime in harsh environments. UL Listed, NEC 230.62 barrier compliance and a NEMA 4X 316 stainless steel enclosure ensure safety and long-term reliability in demanding settings. This solution integrates robust motor protection with a compact footprint, delivering reliable isolation while reducing maintenance costs and improving safety margins for your facility.
Product Information
Extended Description
DH321NWK316 Eaton: Eaton Heavy duty single-throw fused safety switch, Corrosion resistant, 30 A, NEMA 4X, Grade 316 stainless steel, Fusible with neutral, Three-pole, Four-wire, 240 V, Max Hp: 1.5, 3/ 3, 7.5/ 5 hp (1,3PH @Std/TD, 250 Vdc), #14-#2 Cu/Al
Product Name
Eaton heavy duty fusible safety switch
Catalog Number
DH321NWK316
UPC
782116489893
Product Length/Depth
10 in
Product Height
17.88 in
Product Width
8.13 in
Product Weight
22 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
Enclosure
NEMA 4X
Enclosure material
316 stainless 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
#14-2 AWG Cu/Al
Amperage Rating
30A
HP rating - max
1.5, 3/ 3, 7.5/ 5 hp (1,3PH @Std/TD, 250 Vdc)
NEMA rating
NEMA 4X (Stainless)
Voltage rating
240V
Product Category
Heavy Duty, Fusible with neutral
The enclosure is crafted from 316 stainless steel and rated NEMA 4X, which translates to superior corrosion resistance and lower maintenance in coastal or chemical environments, reducing total cost of ownership. The device is fusible with neutral using Class H fuses, providing precise fault isolation that minimizes downtime and protects upstream equipment, improving system reliability in three-phase processes. With a 30A amperage rating and a 240V voltage rating, it supports modest motor loads while enabling scalable protection as equipment upgrades occur. The three-pole, four-wire configuration supports balanced power distribution and straightforward wiring with #14-2 AWG Cu/Al conductors, simplifying field installation and future expansions. UL listing and NEC barrier compliance offer confidence in safety and code adherence during audits and inspections. The compact 10 in depth, 17.88 in height, and 8.13 in width fit standard panels without demanding enclosure real estate, while a 22 lb weight allows easier installation and relocation. A one-year warranty (or 18 months from shipment) minimizes risk and supports your maintenance planning. In practice, this switch integrates seamlessly with motor control centers and processing equipment, delivering dependable protection aligned with industry standards.
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FAQs
Installers should plan for a three-pole, four-wire configuration with #14-2 AWG Cu/Al conductors, 240V operation, and a 30A protection device. The enclosure is NEMA 4X and made from 316 stainless steel, enabling outdoor or washdown-ready installations. Ensure ULListed compatibility and NEC barrier compliance per the product specifications, and allocate space for a compact 10 in depth, 17.88 in height, and 8.13 in width footprint.
Yes. The switch uses a 316 stainless steel enclosure rated NEMA 4X, designed for corrosion resistance in harsh environments. This makes it well-suited for outdoor installations, chemical plants, and washdown areas where exposure to moisture and contaminants is a concern while maintaining safe, reliable operation.
The DH321NWK316 is UL Listed and complies with NEC 230.62 barrier requirements, supporting safe operation and code compliance. The NEMA 4X enclosure further reinforces protection against dust, water, and corrosion, helping facilities meet regulatory and safety standards during audits and inspections.
The unit is rated 30A with HP ratings of 1.5, 3/3, and 7.5/5 hp for respective 1- or 3-phase configurations at 250 Vdc. This makes it appropriate for smaller to mid-size motors and auxiliary loads in packaging lines, conveyors, pumps, and processing equipment where precise fused protection and reliable isolation are required.
The product carries Eaton’s standard warranty: one year from the date of installation or eighteen months from shipment, whichever occurs first. This aligns with typical industrial equipment warranties and supports planned maintenance and long-term ROI by reducing unexpected replacement costs.