Eaton DH225NPK Heavy Duty Fusible Safety Switch - NEMA 4
Part Number: DH225NPK
Quick Summary
The Eaton DH225NPK heavy duty fusible safety switch safely isolates and protects electrical feeders in industrial facilities. Operators often contend with nuisance fuse trips and downtime during maintenance, and this unit is engineered to minimize both. It carries UL Listed certification and a NEMA 4 enclosure, plus Class H fuse provisions for robust fault protection in challenging environments. Beyond safety, the design supports efficient installation, compatibility with large feeders, and reliable operation across industrial power distribution. With 400A protection, 240V operation, and 3‑wire capability, it addresses common plant needs for motor control, feeder reliability, and safety compliance. The result is faster project onboarding, fewer change orders, and clearer maintenance planning for industrial customers.
Product Information
Extended Description
DH225NPK Eaton: Eaton Heavy duty single-throw fused safety switch, Enhanced visible blade, 400 A, NEMA 4, 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 Cu/Al
Product Name
Eaton heavy duty fusible safety switch
Catalog Number
DH225NPK
UPC
782114371176
Product Length/Depth
57 in
Product Height
11 in
Product Width
27 in
Product Weight
123 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
3-Phase hp ratings shown are grounded B phase ratings; UL listed
Enclosure
NEMA 4
Enclosure material
Painted 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 4
Voltage rating
240V
Product Category
Heavy Duty, Fusible with neutral
Commercial Distribution, Switching Devices, Volume 2, Tab 1
Eaton Specification Sheet - DH225NPK
Selling Policy 25-000 - Distribution and Control Products and Services
Feature 400A amperage rating → Business Impact greater protection for high‑demand feeders and motors → Application suitable for industrial power distribution and motor control panels. Feature NEMA 4 painted steel enclosure → Business Impact enhanced reliability in dusty, wet, or washdown environments → Application indoor/outdoor installations with demanding exposure. Feature Fuse class provision Class H → Business Impact improved safety margins and easier fuse coordination → Application protects critical circuits with selectable protection. Feature Fuse configuration Fusible with neutral → Business Impact simplified wiring and compliant neutral integration → Application supports neutrals in two‑pole configurations in control cabinets. Feature Large conductor compatibility up to (#1/0–750 kcmil Cu/Al) → Business Impact reduces field splicing and labor costs → Application streamlines feeder connections to large main conductors. Feature Dimensions 57 in length, 11 in height, 27 in width → Business Impact fits standard switchgear footprints and eases panel layout → Application accelerates installation in existing spaces. Feature UL Listed and 400A/50 HP ratings → Business Impact delivers confidence in code compliance and performance → Application supports 3‑phase motor control up to 50 HP, reducing engineering time. Rugged enclosure suitable for washdown zones and outdoor installations → Business Impact extends service life and lowers maintenance costs → Application aligns with plant safety programs and long‑term reliability.
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FAQs
The DH225NPK is designed for both retrofit and new installations in industrial control panels using a 240V three-phase supply. It uses a two-pole design with a neutral and Class H fuse provision, housed in a NEMA 4 painted steel enclosure. Plan for proper lug sizing, panel clearance, and adherence to UL and local electrical codes during termination and torque settings.
For 3-phase motors up to 50 HP at standard fuse/time-delay and 250 Vdc, the DH225NPK delivers 400 A protection with a visible blade and fused switching. It supports 3-wire configurations and accepts large conductors (up to #1/0-750 kcmil Cu/Al). This reduces start-up surges, extends motor life, and simplifies panel coordination with upstream protection.
Yes. The unit is UL Listed and features a NEMA 4 enclosure with painted steel construction designed to withstand dust, moisture, and washdown in demanding environments. The fused switch also includes a neutral connection and Class H fuse provision for safety and fault isolation. This makes it suitable for factory floors, outdoor plants, and washdown zones.
Warranty is covered by Eaton Selling Policy 25-000, offering one year from installation or eighteen months from shipment, whichever occurs first. Additional support includes access to datasheets, installation guides, and technical datasheets. This policy ensures predictable replacement timelines, minimizes downtime, and supports compliant maintenance across equipment lifecycles.
It provides compatibility with standard low‑voltage distribution gear, featuring 400A amperage, two poles, neutral, and 3-wire operation. With a 57 in depth, 27 in width, and 11 in height enclosure, it fits common switchgear footprints while maintaining 240V service. UL listed, NEMA 4 rated, and ready for motor control circuits up to 50 HP, reducing engineering time.