Eaton DH225NPKW Fusible Safety Switch - UL Listed
Part Number: DH225NPKW
Quick Summary
Eaton DH225NPKW fusible safety switch provides heavy-duty electrical protection for industrial control panels. In demanding environments, operators need reliable isolation and safe maintenance to minimize downtime and risk. This unit carries UL Listed safety certification and a NEMA 3R enclosure, delivering code-compliant performance and outdoor durability for exposed installations. Designed for heavy commercial and industrial use, it fits standard control panels and switchgear while supporting large conductor sizes. By combining fast isolation with robust protective features, it helps facilities improve uptime, protect motors and feeders, and simplify service routines during routine maintenance or fault conditions. Designed for compatibility with Eaton HDSS and similar legacy disconnections, it supports fast retrofits.
Product Information
Extended Description
DH225NPKW Eaton: Eaton Heavy duty single-throw fused safety switch, 400 A, NEMA 3R, Fusible with neutral, Two-pole, 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 Al
Product Name
Eaton heavy duty fusible safety switch
Catalog Number
DH225NPKW
UPC
786680181580
Product Length/Depth
45.5 in
Product Height
10.25 in
Product Width
24.38 in
Product Weight
124 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
Heavy Duty Safety Switch (HDSS). Window & Visible Blade
Enclosure
NEMA 3R
Enclosure material
Painted galvanized 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 3R
Voltage - max
600 V
Voltage rating
240V
Application
Heavy commercial and industrial
Series
K
400 A amperage rating with 240 V operation enables a single, clear disconnect for heavy motor loads. This reduces panel crowding, simplifies protective coordination, and lowers lifecycle costs by allowing a single device to protect feeders and motors. It's well suited for industrial environments where large horsepower motors require dependable fault isolation and fast maintenance. Fusible with neutral configuration provides selective protection and wiring compatibility with standard fuses. The Class H fuse provision supports reliable, time-delay protection for motors, helping prevent nuisance trips while still meeting protection requirements. This combination improves downtime, energy management, and compliance in process lines and conveyors. Enclosure rating is NEMA 3R and painted galvanized steel delivers outdoor and humid environment protection, reducing corrosion risk and maintenance. The window and visible blade on the HDSS design allow technicians to verify status without opening the enclosure, speeding lockout-tagout and maintenance. These design features improve installation confidence and worker safety on busy industrial floors. Conductor sizing supports substantial Al conductors up to (2)#1/0-(2)300 kcmil or (1)#1/0-(1)750 kcmil per phase, enabling flexible feeder design and easy upgrades. This reduces the need for cable changes during expansion and simplifies field termination. The two-pole, three-wire configuration keeps wiring neat and NEC-compliant in demanding installations. Eaton backs the DH225NPKW with UL Listed safety certification and a strong warranty window of one year from installation or eighteen months from shipment. Its rugged construction, windowed status indicator, and proven protection features translate to higher uptime, safer operation, and faster commissioning for control panels in manufacturing, water treatment, or facilities management settings. Designed for compatibility with Eaton HDSS and similar legacy disconnections, it supports fast retrofits.
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FAQs
Key installation considerations include the 400 A rating at 240 V, two-pole operation with neutral, and the NEMA 3R outdoor-rated enclosure. The unit accommodates large conductors (up to (2)#1/0-(2)300 kcmil or (1)#1/0-(1)750 kcmil Al), while the window and visible blade allow quick status checks. Plan for proper pad or panel clearance and ensure wiring schedules align with NEC requirements.
The DH225NPKW is UL Listed, providing essential electrical safety certification for code compliance. Its NEMA 3R enclosure supports outdoor or harsh environments, and the fusible with neutral configuration offers selective protection aligned with standard fusing practices. The design also supports straightforward maintenance with a windowed status indicator for safe operation.
Best applications include heavy commercial and industrial panels, motor feeders, and outdoor installations requiring robust overcurrent protection at 240 V. With a 400 A rating and HP capability up to 50/125/50 for three-phase loads, it’s well-suited for large motors, conveyors, pumps, and other high-demand equipment in manufacturing, processing, and utilities settings.
For long ROI, stock Class H fuses compatible with the fusible configuration, replacement window components, and standard bolt-on connections for large conductors are key. The unit’s UL Listed status, durable NEMA 3R enclosure, and straightforward maintenance access help minimize downtime. The warranty term supports service planning, with coverage extending from shipment or installation per policy 25-000.
Compared with non-fusible switches, the DH225NPKW provides built-in overcurrent protection via fusible design, enabling faster fault isolation and better coordination with downstream protective devices. This can reduce arc energy and downtime, improving energy management and system reliability in demanding industrial workstreams while maintaining safe and compliant operation in control panels.