Eaton DH325NPKV Heavy Duty Fusible Safety Switch - NEMA 4
Part Number: DH325NPKV
Quick Summary
Eaton DH325NPKV heavy duty fusible safety switch provides reliable isolation for 3‑phase industrial equipment. In the field, nuisance fuse changes and panel access slow projects and raise maintenance costs. UL Listed certification, NEMA 4 enclosure, and Class H fuse protection ensure rugged, code-compliant operation in damp or dusty environments. Designed for four-wire, three-pole installations, this switch supports NEC compliance while delivering predictable performance. By combining robust connectivity with straightforward installation, it minimizes downtime and lifetime costs, making it a practical choice for OEMs, integrators, and maintenance teams seeking dependable protection without complexity. The result is a safer, more reliable panel that technicians trust for fast, repeatable service.
Product Information
Extended Description
DH325NPKV Eaton: Eaton Heavy duty single-throw fused safety switch, Enhanced visible blade, 400 A, NEMA 4, Class H, Neutral, Four-wire, Three-pole, 240 V, Max Hp: 50, 125/ 50 hp (3PH @Std, TD/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
DH325NPKV
UPC
786685972657
Product Length/Depth
57 in
Product Height
11 in
Product Width
27 in
Product Weight
125 lb
Compliances
NEC 230.62 (C) Compliant Barrier
Certifications
UL Listed
Catalog Notes
Heavy Duty Safety Switch (HDSS)
Enclosure
NEMA 4
Enclosure material
Painted 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
Amperage Rating
400A
HP rating - max
50, 125/ 50 hp (3PH @Std, TD/250 Vdc)
NEMA rating
NEMA 4
Voltage rating
240V
Feature: The DH325NPKV provides 400A at 240V in a four-wire, three-pole configuration with a neutral. Business Impact: This setup minimizes fault energy, simplifies wiring, and enhances arc flash protection, translating into safer operation and lower commissioning risk. Application: Ideal for large motors, pumps, and conveyors in demanding manufacturing environments where uptime and protection are paramount. Feature: Enhanced visible blade enables quick visual confirmation of switch position. Business Impact: Reduces maintenance time, improves lockout/tagout safety, and accelerates fault diagnosis. Application: On-site panel changes, equipment testing, and routine servicing across industrial facilities. Feature: NEMA 4 enclosure in painted steel delivers rugged, weather- and ingress-resistant protection. Business Impact: Supports washdowns and dusty environments, extending service intervals and reducing enclosure-related failures. Application: Outdoor or harsh-floor installations such as automotive, food & beverage, and general assembly lines. Feature: Class H fuse provision with neutral and four-wire, three-pole configuration. Business Impact: Provides reliable short-circuit protection for large conductor runs, while enabling flexible insulation and grounding schemes. Application: Power distribution to high-load machinery with large conductor sizes in metal enclosures. Feature: Conductor terminal capacity accommodates large Cu/Al sizes (two #1/0 to two 300 kcmil or one #1/0 to one 750 kcmil). Business Impact: Reduces the need for splices and multiple termination kits, cutting installation time and material costs. Application: Motor starters, drives, and process equipment feeding heavy feeders in control panels.
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FAQs
The DH325NPKV is designed for four-wire, three-pole applications feeding large motors and process equipment. Its 400A at 240V rating supports heavy-duty motor control, while the NEMA 4 enclosure provides protection in wash-down and dusty environments. This makes it ideal for packaging lines, conveyors, pumps, and other critical factory circuits requiring reliable isolation and safety.
The enhanced visible blade allows technicians to verify switch position at a glance, reducing the risk of accidental energization during maintenance. This visibility speeds lockout/tagout verification and lowers human-error potential during servicing, especially in busy panels or during routine testing on large-capacity circuits.
Yes, the DH325NPKV is UL Listed. It complies with NEC 230.62 barrier requirements and is designed for safe operation in damp or dusty environments thanks to its NEMA 4 enclosure. This combination supports safer installations, easier compliance auditing, and reliable performance in industrial control panels.
The switch supports large conductor sizes suitable for heavy feeders: two #1/0 to two 300 kcmil copper or aluminum, or one #1/0 to one 750 kcmil Cu/Al. This accommodates robust power distribution without frequent terminations, reducing splicing and increasing terminal reliability on high-load circuits.
ROI comes from minimized downtime, reduced maintenance cycles, and safer operation due to the enhanced visible blade and reliable 400A protection. The sturdy NEMA 4 enclosure withstands harsh environments, lowering enclosure-related failures, and the UL Listed rating simplifies compliance, all contributing to lower total cost of ownership over the switch’s service life.