Eaton DH221NWK316 Heavy Duty Fusible Switch - NEMA 4X
Part Number: DH221NWK316
Quick Summary
The Eaton DH221NWK316 Heavy Duty Fusible Safety Switch is designed for reliable isolation of power in demanding industrial environments. This corrosion-resistant, stainless steel enclosure protects personnel and equipment from accidental energization while enabling quick maintenance. It is UL Listed and built to withstand washdown and outdoor applications with a NEMA 4X rating. The unit features a Class H fuse provision, neutral, and two-pole, three-wire configuration, supporting 240 V systems. With #14-#2 copper or aluminum wiring compatibility, it delivers practical flexibility for motor control centers and safety interlock projects. Its compact 20 in length and 9.5 x 8.5 in footprint helps optimize panel space, lowering installation costs in mid- to large-scale facilities.
Product Information
Extended Description
DH221NWK316 Eaton: Eaton Custom single-throw fused safety switch, Corrosion resistant, enhanced visible blade, 30 A, NEMA 4X, Class H, neutral, Two-pole, Three-wire, 240 V, Max Hp: 1.5, 3 hp/3, 7.5 hp/5 hp (1,3PH @ Std fuse/time delay/250 Vdc), #14-#2 Cu/Al
Product Name
Eaton heavy duty fusible safety switch
Catalog Number
DH221NWK316
UPC
782116489756
Product Length/Depth
20 in
Product Height
8.5 in
Product Width
9.5 in
Product Weight
20 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
304 stainless steel
Fuse class provision
Class H
Fuse configuration
Fusible with neutral
Number Of Poles
Two-pole
Number of wires
3
Type
Heavy duty fusible safety switch
Amperage Rating
30A
HP rating - max
1.5, 3 hp/3, 7.5 hp/5 hp (1,3PH @ Std fuse/time delay/250 Vdc)
NEMA rating
NEMA 4X (Stainless)
Voltage rating
240V
Product Category
Heavy Duty, Fusible with neutral
Commercial Distribution, Switching Devices, Volume 2, Tab 1
Eaton Specification Sheet - DH221NWK316
Selling Policy 25-000 - Distribution and Control Products and Services
Feature: NEMA 4X stainless steel enclosure provides superior corrosion resistance in harsh environments — Business Impact: reduces maintenance downtime and extends equipment life; Application: outdoor, washdown, chemical or coastal facilities. The DH221NWK316 is compatible with #14-#2 Cu/Al conductors and supports 240 V, two-pole, three-wire configurations — Business Impact: simplifies wiring and procurement while ensuring reliable power isolation; Application: plant floors and control panels. Feature: Class H fuse provision with neutral — Business Impact: enables precise motor control protection and fault isolation; Application: variable HP loads up to 7.5 hp across multiple phases. Feature: 30 A amperage rating and HP range up to 1.5, 3 hp (1,3PH @ Std fuse/time delay/250 Vdc) — Business Impact: scalable protection for common industrial drives; Application: medium-duty motors and conveyors. Feature: UL Listed and NEC barrier compliant — Business Impact: simplifies compliance audits and installation approvals; Application: regulated facilities and safety-critical lines. Feature: Compact dimensions and weight (20 in x 9.5 in x 8.5 in, 20 lb) — Business Impact: saves valuable enclosure space and supports modular integration; Application: retrofit projects and space-constrained switchgear rooms.
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FAQs
The DH221NWK316 is wired as a two-pole switch with a neutral. Connect the line conductors to the appropriate line terminals and the neutral conductor to the neutral terminal. Use #14-#2 Cu/Al conductors as rated, verify the enclosure is sealed for NEMA 4X service, and install fuses per the Class H specification. Ensure proper torque and labeling per Eaton guidelines and NEC requirements.
This model is rated for 30 A at 240 V, with HP limits of 1.5 hp and 3 hp (3-phase at standard fuse/time delay for 250 VDC) and up to 7.5 hp / 5 hp under appropriate configurations. It is a two-pole, three-wire device with neutral, suitable for mid-range motor loads in diverse industrial applications.
Yes. It uses a 304 stainless steel enclosure rated NEMA 4X, providing excellent corrosion resistance for washdown, chemical, and outdoor installations. This makes it well-suited for facilities requiring robust protection against moisture, salts, and cleaners, while maintaining safety isolation and reliability.
The DH221NWK316 is UL Listed and features NEC 230.62 (C) compliant barrier, supporting safe and compliant power isolation. These certifications help streamline inspections, ensure safety standards are met, and facilitate procurement within regulated industries such as manufacturing, food & beverage, and water treatment.
Eaton offers the Selling Policy 25-000 warranty: one year from installation or eighteen months from shipment, whichever occurs first. This supports maintenance planning for safety switches, including spare parts and service guidance from Eaton-authorized channels, helping maximize uptime and protect capital investment.