Eaton DH425FRK Fusible Safety Switch - UL Listed
Part Number: DH425FRK
Quick Summary
Eaton DH425FRK Fusible Safety Switch provides reliable 400 A disconnect for motor and panel protection. When upgrading plant power or expanding lines, downtime and safety risk can spike; this unit combines rugged construction with straightforward field wiring to minimize both. It carries UL Listed certification and a NEMA 3R enclosure, plus Class H fuses for dependable protection in exposed or outdoor environments. Designed for four-pole, four-wire configurations, it supports large conductor ranges while helping reduce total cost of ownership through durable performance and low-maintenance operation. This makes it a practical choice for industrial protection systems and motor control panels where reliability matters most.
Product Information
Extended Description
DH425FRK Eaton: Eaton Enhanced visible blade single-throw safety switch, 400 A, NEMA 3R, Class H, Four-pole, Four-wire, 240 V, Max Hp: 50, 50/ 125/50 hp (1,3PH @Std/3PH @TD/250 Vdc), 600 V, (2)#1/0-(2)300 kcmil; or (1)#1/0-(1)750 kcmil Al
Product Name
Eaton heavy duty fusible safety switch
Catalog Number
DH425FRK
UPC
786685234823
Product Length/Depth
45.5 in
Product Height
10.25 in
Product Width
24.38 in
Product Weight
141 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
Enclosure
NEMA 3R
Enclosure material
Painted galvanized steel
Fuse class provision
Class H
Fuse configuration
Fusible without neutral
Number Of Poles
Four-pole
Number of wires
4
Type
Heavy duty fusible safety switch
Amperage Rating
400A
HP rating - max
50, 50/ 125/50 hp (1,3PH @Std/3PH @TD/250 Vdc)
NEMA rating
NEMA 3R
Voltage - max
600 V
Voltage rating
240V
Product Category
Heavy Duty, Fusible without neutral
Feature → Business Impact → Application: 400 A amperage rating with Class H fuse provides robust short-circuit and overload protection, reducing equipment damage and downtime while enabling safe startup of large motors in manufacturing lines. Use in heavy-duty motor circuits up to 50 HP (std 1Ø, TD 3Ø @ 250 Vdc, 50/125/50 HP) to protect feeders and drives without compromising performance. Feature → Enclosure: NEMA 3R painted galvanized steel enclosure offers weather-resistant protection for outdoor installations and harsh environments, minimizing enclosure corrosion and maintenance costs while ensuring continued operation in plant yards and exposed switchgear areas. Feature → Configuration: Four-pole, four-wire design with fusible without neutral simplifies interconnection in 3Ø and single-phase applications, aiding straightforward panel integration and reducing wiring errors during installation. Feature → Conductor Capacity: Accepts large conductors (2/0 to 300 kcmil (Al/Cu) or 1/0 to 750 kcmil Al) enabling flexible feeder design and future upgrades without replacing the switch. Feature → Dimensions and Weight: At 45.5 in L × 24.38 in W × 10.25 in H and 141 lb, it fits standard footprint areas and aligns with typical mounting layouts in industrial control rooms and outdoor enclosures. Feature → Standards and Warranty: UL Listed certification with a one-year warranty (or 18 months from shipment) reinforces compliance, support, and long-term value for procurement and maintenance teams.
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FAQs
The DH425FRK is ideal for industrial motor protection and feeder protection in harsh environments. It supports four-pole, four-wire configurations up to 400 A and is specified for motors up to 50 HP (1Ø Std, 3Ø TD/250Vdc). Its NEMA 3R enclosure makes it suitable for outdoor switchgear, panel boards, and outdoor motor control centers, delivering dependable disconnection and protection when reliability matters most.
Class H fuses in the DH425FRK provide fast, dependable protection for high-current circuits while allowing selective coordination with downstream devices. The fusible design helps limit fault energy, reducing damage to motors and controllers. This results in shorter downtime, easier fault isolation, and improved safety during maintenance and startup in heavy-duty machinery lines.
Yes. The DH425FRK features a NEMA 3R enclosure with painted galvanized steel construction, designed for outdoor and semi-exposed environments. This enclosure rating provides adequate protection against precipitation and environmental contaminants, allowing reliable operation in loading docks, outdoor substations, and open control panels without compromising safety or performance.
The unit accommodates large conductor sizes, including (2) #1/0 to (2) 300 kcmil copper/aluminum or (1) #1/0 to (1) 750 kcmil aluminum. This wide range supports high current feeds and future capacity upgrades, enabling flexible installation strategies for 3Ø and mixed-voltage motor circuits in industrial facilities.
Eaton provides a one-year warranty from installation or eighteen months from shipment, whichever comes first, as per policy 25-000. In addition to the warranty, the product is UL Listed and backed by Eaton’s service network and datasheets, including the DH425FRK specification sheet and catalog references for ongoing maintenance, spares, and updates to safety requirements.