Eaton DH424FDK Heavy Duty Fusible Safety Switch - UL Listed NEMA 12/3R
Part Number: DH424FDK
Quick Summary
Eaton DH424FDK heavy duty fusible safety switch provides a safe disconnect for 200 A industrial circuits. This design minimizes downtime and protects personnel by using a rugged NEMA 12/3R enclosure with UL Listed safety features, sealing against dust and moisture. It resists field corrosion and simplifies maintenance through a painted galvanized steel enclosure and field modify-to-rainproof capability via drain hole options. The unit supports 240 V operations with a 200 A rating and flexible four-pole, four-wire configurations for motor and process loads. UL Listing and Class H fuse provisions help ensure regulatory compliance while a straightforward installation supports fast commissioning and low total cost of ownership.
Product Information
Extended Description
DH424FDK Eaton: Eaton Enhanced visible blade single-throw safety switch, 200 A, NEMA 12/3R, Class H, Four-pole, Four-wire, 240 V, Max Hp: 30, 25/ 50, 60/ 40 hp (1,3PH @Std/TD/250 Vdc), 600 V, #6-300 kcmil Cu/Al
Product Name
Eaton heavy duty fusible safety switch
Catalog Number
DH424FDK
UPC
782113206769
Product Length/Depth
37.5 in
Product Height
11.5 in
Product Width
19 in
Product Weight
58 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
Can be field modified to meetNEMA 3R rainproof requirements when a factory provided drain hole is opened
Enclosure
NEMA 12, 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
200A
HP rating - max
30, 25/ 50, 60/ 40 hp (1,3PH @Std/TD/250 Vdc)
NEMA rating
NEMA 12/3R
Voltage - max
600 V
Voltage rating
240V
Product Category
Heavy Duty, Fusible without neutral
Feature → Business Impact → Application: The 200 A rating with a four-pole four-wire configuration delivers a true disconnect for three-phase motors, isolating line and load safely, reducing arc exposure and improving personnel safety. Applied in control panels and manufacturing lines where 200 A feeds are common, this enables reliable protection without nuisance tripping. Feature → Business Impact → Application: Class H fuse provision enhances fault isolation and protects downstream devices, lowering maintenance costs and downtime in high-startup-load environments such as pumps and drives. Used in industrial power distributions that demand robust short-circuit protection with predictable coordination. Feature → Business Impact → Application: Fusible without neutral configuration simplifies wiring in three-phase systems, reducing panel complexity and improving fault-clearance speed for motor starters in material handling and packaging lines. Feature → Business Impact → Application: NEMA 12, NEMA 3R enclosure versatility provides good resistance to dust, moisture, and field rainproofing when a drain hole is opened in the factory, enabling field customization for outdoor-rated installations. Feature → Business Impact → Application: Copper/aluminum conductor compatibility (#6-300 kcmil) and voltage ranges up to 600 V maximize wiring flexibility across equipment fleets, supporting easy integration with existing motor control centers and feeders. Feature → Business Impact → Application: UL Listed certification and Eaton data supports compliance, simplifies procurement specs, and accelerates commissioning in regulated environments like food & beverage, durable goods, and automotive assembly.
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FAQs
DH424FDK uses a four-pole, four-wire configuration designed for three-phase circuits. It accepts Cu/Al conductors from #6 to 300 kcmil and operates at 240 V with a 600 V max rating. For installation, align line and load terminals per the datasheet, ensure rated fuses (Class H) are installed, and verify enclosure type (NEMA 12/3R) matches environmental requirements. This setup is ideal for industrial control panels and motor feeders in manufacturing lines.
HP ratings are 30 for standard 1PH circuits and vary to 25/50, 60/40 hp depending on the drive and voltage. Voltage rating is 240 V nominal with a 600 V maximum, supporting 4-wire, four-pole configurations. These specs suit motor drives and equipment with high starting torque, enabling safe isolation and protection across common industrial motor loads.
The DH424FDK features a NEMA 12 enclosure with field-modifiable options to meet NEMA 3R rainproof requirements when a drain hole is opened. While factory-rated for indoor or covered areas, you can extend protection in outdoor or damp environments by configuring the drain and enclosure solution per Eaton guidelines, ensuring safe operation in harsher sites.
This safety switch is UL Listed, indicating compliance with recognized safety standards for electrical equipment. The Class H fuse provision assists with proper short-circuit protection, and the field-modifiable rainproof option supports regulatory compliance in varied environments. These certifications support safer installations and easier procurement alongside existing safety programs.
Eaton provides a warranty under policy 25-000: one year from installation or eighteen months from shipment, whichever occurs first. For ongoing support, consult Eaton’s technical resources and datasheets, available for field maintenance planning. Regular inspection of enclosure, fuse status, and wiring integrity helps sustain reliability and minimizes unplanned downtime in critical production lines.