Eaton DH426FRK Heavy Duty Fusible Safety Switch - NEMA 3R
Part Number: DH426FRK
Quick Summary
Eaton DH426FRK heavy duty fusible safety switch provides reliable power control for industrial panels and motor circuits. Too-small protective devices or non-fusible switches can cause nuisance trips and costly downtime during peak production. UL Listed, NEMA 3R enclosure, and Class H fuse provisions ensure reliable protection in harsh environments and for outdoor installations. This unit supports 600 A ratings and 75 hp at 240 V, four-pole, four-wire configurations, delivering resilient protection and straightforward wiring for distribution panels and motor feeders. It also supports efficient installation with clearly labeled terminations and compatible conductor sizes, helping plants reduce maintenance and optimize protective coordination across three-phase systems.
Product Information
Extended Description
DH426FRK Eaton: Eaton Enhanced visible blade single-throw safety switch, 600 A, NEMA 3R, Class H, Four-pole, Four-wire, 240 V, Max Hp: 75 hp at 240 Vac Std. 3 Ph, 200 hp at 240 Vac TD 3 Ph, 600 V, (1)#2-(1)600 kcmil; and (1)#1/0-(1)750 kcmil Al
Product Name
Eaton heavy duty fusible safety switch
Catalog Number
DH426FRK
UPC
786685234830
Product Length/Depth
58 in
Product Height
12 in
Product Width
27.5 in
Product Weight
182 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
600A
HP rating - max
75 hp at 240 Vac Std. 3 Ph, 200 hp at 240 Vac TD 3 Ph
NEMA rating
NEMA 3R
Voltage - max
600 V
Voltage rating
240V
Product Category
Heavy Duty, Fusible without neutral
Commercial Distribution, Switching Devices, Volume 2, Tab 1
Eaton Specification Sheet - DH426FRK
Selling Policy 25-000 - Distribution and Control Products and Services
Feature → Business Impact → Application: The 600 A amperage rating with a four-pole, 240 V three-phase design delivers robust fault protection for large motors and feeders, reducing arc-flash risk and unplanned downtime in manufacturing facilities. This translates to improved overall equipment effectiveness (OEE) and safer maintenance windows for critical lines such as pumps, conveyors, and extruders. Feature → Business Impact → Application: NEMA 3R enclosure and painted galvanized steel construction provide outdoor and harsh-environment reliability, minimizing corrosion and weather-related failures in outdoor switchgear rooms and exterior equipment pads. Application: ideal for outdoor substations and exposed plant walls where weather resistance is essential. Feature → Business Impact → Application: Class H fuse provision simplifies protection coordination while delivering fast clearing at fault, lowering conductor insulation stress and extending equipment life. Application: feeders and motor circuits in process plants requiring predictable protection curves. Feature → Business Impact → Application: Fusible without neutral configuration streamlines wiring for standard 4-wire systems, reducing installation time and error-prone lug connections. Application: switchgear enclosures and motor control centers in high-production environments. Feature → Business Impact → Application: Compatibility with large feeders and jumpers using conductor sizes up to 600 kcmil copper or 750 kcmil aluminum supports scalable power distribution. Application: large drive systems and line feeders in heavy industries. The unit’s max horsepower ratings—75 hp at 240 Vac standard and 200 hp at 240 Vac TD—enable efficient motor protection across a wide range of load profiles, delivering dependable performance in daily operations. Warranty and support aligned with Eaton policy provide peace of mind for maintenance teams and procurement.
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FAQs
DH426FRK is a four-pole fusible safety switch designed for 240V three-phase service. Installers should wire four conductors (three phase plus neutral where required), verify Class H fuse compatibility, and use appropriately sized feeders up to 600A. The NEMA 3R enclosure supports indoor or outdoor mounting, aiding code compliance and service access.
Key specs include an amperage rating of 600A, a max HP rating of 75 hp at 240V standard, 200 hp at 240V for TD service, and a 600V maximum voltage. The enclosure is NEMA 3R, with UL Listing, and the fuse configuration is fusible without neutral, suitable for four-wire systems.
Yes. With a 600A rating and 75 hp at 240V, the DH426FRK provides robust motor feeder protection for heavy-duty drives. Its Class H fuse and four-pole design enable effective protection coordination, while the NEMA 3R enclosure supports outdoor or semi-outdoor installations common in manufacturing plants.
The DH426FRK is UL Listed, features a NEMA 3R enclosure, and uses Class H fuses for appropriate overcurrent protection. These certifications support compliance with industry safety standards and facilitate installation in both indoor and outdoor environments, meeting typical industrial protection requirements.
Eaton’s policy for this product references Selling Policy 25-000, offering one year from installation or eighteen months from shipment, whichever occurs first. This coverage supports maintenance planning and product reliability, with access to Eaton support for parts, documentation, and technical guidance.