Eaton DH421FGK Heavy Duty Fusible Safety Switch - UL Listed
Part Number: DH421FGK
Quick Summary
The Eaton DH421FGK heavy duty fusible safety switch provides reliable protection for industrial control circuits in demanding manufacturing environments. Many engineers contend with unplanned downtime and safety risk during circuit isolation; this unit delivers reliable isolation and code-compliant protection. Key validations include UL Listed certification and a NEMA 1 enclosure, enabling safe indoor installation and longevity in harsh settings. Designed as a four-pole, four-wire device with a 30 A rating and 240 V nominal (600 V max), it supports easy integration into existing panels while reducing overall lifecycle costs.
Product Information
Extended Description
DH421FGK Eaton: Eaton Heavy duty single-throw fused safety switch, 30 A, NEMA 1, Painted steel, Class H, Fusible without neutral, Four-pole, Four-wire, 240 V, Max Hp: 3, 3/ 10, 7.5/ 5 hp (1,3PH @Std/TD/250 Vdc), 600 V, #14-#2 Cu/Al
Product Name
Eaton heavy duty fusible safety switch
Catalog Number
DH421FGK
UPC
782113205380
Product Length/Depth
22.5 in
Product Height
8.5 in
Product Width
13.5 in
Product Weight
18 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 1
Enclosure material
Painted 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
30A
HP rating - max
3, 3/ 10, 7.5/ 5 hp (1,3PH @Std/TD/250 Vdc)
NEMA rating
NEMA 1
Voltage - max
600 V
Voltage rating
240V
Product Category
Heavy Duty, Fusible without neutral
Four-pole, four-wire configuration with Class H fuse provision provides complete isolation for all poles, reducing the risk of adjacent circuits energizing during maintenance. The business impact is safer lockout-tagout procedures and faster service turnarounds, especially on multi-motor systems. In practice, it supports motor control circuits and general industrial equipment in 240 V distribution panels, enabling reliable protection without complicating wiring.\n\nEnclosure: NEMA 1 with painted steel delivers indoor protection against dust and incidental impacts, boosting durability in factory environments. The result is reduced maintenance costs and longer service life for enclosures in busy production floors. It’s well suited for panel-mounted disconnects on conveyors, pumps, and processing lines where rugged, code-compliant protection is needed.\n\nUL Listed certification ensures compliance with electrical safety standards for industrial disconnects, while a 30 A rating matches common motor loads and control circuits. The impact is safe, predictable performance without oversizing components, translating to lower upfront costs and simpler approvals with spec sheets. Applications span 240 V distribution on 1-3 phase lines, with HP ratings up to 3 hp standard and 7.5/5 hp in other configurations per the datasheet.\n\nCompact footprint and a 18 lb weight with dimensions of 22.5 in length, 13.5 in width, and 8.5 in height simplify mounting in standard electrical rooms and on equipment frames. The installation advantages include straightforward retrofits, quicker panel integration, and minimal dedicated space requirements for existing lines. This makes the DH421FGK a practical upgrade for legacy lines seeking safer isolation and consistent performance.\n\nWarranty and support: Eaton covers the DH421FGK under the Selling Policy 25-000, offering one year from installation or eighteen months from shipment, whichever occurs first, ensuring access to replacement parts and service.
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FAQs
The DH421FGK uses a four-pole, four-wire configuration with fusible protection (Class H) and is designed for indoor panels. It supports 240 V nominal operation with a maximum of 600 V, accommodating standard motor control circuits and four-wire distribution mounted in NEMA 1 enclosures.
Key ratings include a 30 A amperage rating, 240 V nominal voltage, 600 V maximum voltage, and a UL Listed certification. It features a NEMA 1 indoor enclosure and a four-pole, four-wire arrangement suitable for motor control and industrial disconnects.
The unit measures 22.5 inches in length, 13.5 inches in width, and 8.5 inches in height, with a weight of approximately 18 lb. These dimensions fit standard electrical rooms and panel spaces, enabling straightforward retrofits.
Eaton provides a warranty under Selling Policy 25-000, offering one year from installation or eighteen months from shipment, whichever occurs first. This covers parts and service related to manufacturing defects, aiding long-term maintenance planning.
Ideal for indoor motor control and equipment disconnects in manufacturing lines, conveyors, pumps, and processing equipment. It delivers code-compliant isolation with a rugged NEMA 1 enclosure, enabling safer maintenance and quicker downtime recovery in busy facilities.