Eaton DH225NWK316 Heavy Duty Fusible Switch - UL Listed NEMA 4X
Part Number: DH225NWK316
Quick Summary
Eaton heavy duty fusible safety switch is a robust power-disconnection solution designed for industrial environments and demanding process lines. This model delivers reliable protection and safe isolation of main power in 240 V, three-wire systems, reducing risk during maintenance and startup. UL Listed certification paired with a NEMA 4X stainless enclosure helps resist corrosion and washdown exposure, while NEC 230.62 barrier compliance supports safe panel integration. By combining rugged construction with precise fuse protection, it also minimizes unplanned downtime and maintenance costs. In addition to its corrosion resistance, this switch supports large conductors and high-current motor loads, making it a smart choice for industrial facilities seeking long-term reliability and value.
Product Information
Extended Description
DH225NWK316 Eaton: Eaton Custom single-throw fused safety switch, Corrosion resistant, enhanced visible blade, 400 A, NEMA 4X, Three-wire, 240 V, Max Hp: 50, 125, 50 hp (3PH @ Std fuse/time delay/250 Vdc), (2)#1/0-(2)300 kcmil or (1)#1/0-(1)750 kcmil Cu/Al
Product Name
Eaton heavy duty fusible safety switch
Catalog Number
DH225NWK316
UPC
782116489794
Product Length/Depth
65.5 in
Product Height
10.5 in
Product Width
25.5 in
Product Weight
120 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
400A
HP rating - max
50, 125, 50 hp (3PH @ Std fuse/time delay/250 Vdc)
NEMA rating
NEMA 4X (Stainless)
Voltage rating
240V
Product Category
Heavy Duty, Fusible with neutral
Feature → Business Impact → Application: Corrosion-resistant 304 stainless steel enclosure (NEMA 4X) reduces maintenance cycles and extends service life in harsh environments, lowering total cost of ownership for outdoor or washdown areas. This translates to greater uptime for packaging, metalworking, and chemical processing lines that require dependable power isolation. Feature → Business Impact → Application: Heavy-duty fusible with neutral and Class H fuse protection ensures safe disconnection during faults and predictable motor startup, improving crew safety and protecting downstream equipment in 240 V, 3PH systems such as pumps, conveyors, and fans. Feature → Business Impact → Application: 400 A amperage rating with two-pole, three-wire configuration supports large motor loads and high inrush scenarios, enabling compliant main-disconnect points for machining centers and process skids without oversized gear. Feature → Business Impact → Application: HP rating of 50, 125, 50 hp (3PH @ Std fuse/time delay/250 Vdc) provides flexible protection for varied motor applications, reducing panel clutter and simplifying engineering specs for OEMs and integrators. Feature → Business Impact → Application: Large conductor compatibility (up to 750 kcmil Cu/Al) and terminal options for (2)#1/0-(2)300 kcmil or (1)#1/0-(1)750 kcmil Cu/Al improve installation versatility and reduce field termination time in control houses and switchgear rooms. Feature → Business Impact → Application: UL Listed and NEC 230.62 barrier compliance give QA teams and electrical inspectors clear, auditable protection characteristics, expediting project approval in automotive, food & beverage, and water-treatment facilities. Feature → Business Impact → Application: Enclosure dimensions (65.5 in x 25.5 in x 10.5 in) and overall weight (120 lb) balance mounting footprint with serviceability, easing retrofit projects and new installs in constrained switchgear spaces.
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FAQs
The DH225NWK316 is a two-pole, three-wire fusible switch rated for 400 A at 240 V. For installation, ensure a compliant NEMA 4X stainless enclosure is mounted in a clean, accessible location with adequate clearance for heat dissipation. Plan for neutral connection, proper conductor sizing up to 750 kcmil Cu/Al, and space for future wiring terminations. The unit's NEC 230.62 barrier and UL Listed status support safe integration into industrial panels and switchgear assemblies.
This switch carries UL Listed certification and NEC 230.62 barrier compliance, with a NEMA 4X corrosion-resistant enclosure. These features simplify regulatory review, assist in passing electrical inspections, and align with safety programs in manufacturing, water treatment, and chemical processing facilities. The combination of corrosion resistance and compliance reduces risk during audits and reduces rework on site.
The model provides a max HP rating of 50, 125, 50 hp for 3-phase applications with standard fuse/time delay at 250 Vdc, enabling protection for medium to large motors common in conveyors, pumps, and fans. The 400 A amperage rating supports substantial motor currents, making it suitable for main-disconnect points in industrial drives and process equipment.
The switch is designed for three wires with two poles and can terminate conductor sizes up to 750 kcmil Cu/Al (or two 300 kcmil and two #1/0 per side, depending on terminal options). This flexibility supports large main feeders and high inrush motors, simplifying field terminations and reducing the need for hard-to-source adapters.
The DH225NWK316 uses a 304 stainless steel enclosure rated NEMA 4X, offering superior corrosion resistance and washdown compatibility. This makes it ideal for outdoor installations and harsh environments found in food processing, chemical, and metalworking facilities, helping maintain performance and reducing maintenance costs over time.