Eaton DH321FDK Heavy Duty Fusible Safety Switch - UL Listed
Part Number: DH321FDK
Quick Summary
DH321FDK is an Eaton heavy duty fusible safety switch designed to interrupt power in industrial control panels and service entrances. For engineers and maintenance teams, nuisance fuse trips, hard-to-access enclosures, and unpredictable uptime are persistent pain points that slow production. This unit carries UL Listed certification, NEC 230.62 barrier compliance, and a NEMA 12/3R enclosure rating, underpinning rugged performance in dirty, humid, or dusty environments. With three-pole operation, #14-2 AWG Cu/Al wiring, and field-modifiable rainproof capability, it enables reliable protection while simplifying installation into existing electrical protection schemes. The integrated Class H fuse provision supports planned maintenance and spare parts strategy, delivering measurable improvements in safety and uptime across industrial applications, and aligning with plant safety programs to reduce arc flash risk.
Product Information
Extended Description
DH321FDK Eaton: Eaton Heavy duty single-throw fused safety switch, 30 A, NEMA 12/3R, Painted galvanized steel, Class H, Fusible without neutral, Three-pole, Three-wire, 240 V, Max Hp: 1.5, 3/ 7.5 hp (1,3PH Std/3PH TD), #14-#2 Cu/Al
Product Name
Eaton heavy duty fusible safety switch
Catalog Number
DH321FDK
UPC
782113205410
Product Length/Depth
20 in
Product Height
8.5 in
Product Width
9.5 in
Product Weight
22 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.
Compliances
NEC 230.62 (C) Compliant Barrier
Certifications
UL Listed
Catalog Notes
Suitable for service entrance use with a neutral or ground lug kit installed. 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
Three-pole
Number of wires
3
Type
Heavy duty fusible safety switch
Wire size
#14-2 AWG Cu/Al
Amperage Rating
30A
HP rating - max
1.5, 3/ 7.5 hp (1,3PH Std/3PH TD)
NEMA rating
NEMA 12/3R
Voltage rating
240V
Product Category
Heavy Duty, Fusible without neutral
The 30A, 240V three-pole design provides precise overcurrent protection, reducing nuisance trips and equipment wear while extending motor life and minimizing downtime in manufacturing lines. This translates to higher overall equipment effectiveness (OEE) and more predictable production schedules for industrial protection devices and panel protection applications. The enclosure is rated NEMA 12 and NEMA 3R and constructed from painted galvanized steel, delivering reliable weather and dust resistance for both outdoor and harsh indoor environments. Field-proven to accommodate a neutral or ground lug kit, it supports service entrances with flexible installation options, improving wiring efficiency and safety while reducing retrofit costs. With Class H fuse provision and fusible without neutral configuration, the device enables safe, straightforward maintenance and fast stock turns on spare parts. UL Listed and NEC barrier-compliant, it ensures regulatory alignment and risk reduction for facilities focused on safety and reliability. Its compact footprint (20 in depth and 9.5 x 8.5 in) plus a 22 lb weight simplifies installation in tight panel spaces without compromising protection.
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FAQs
DH321FDK is suitable for service entrance use when a neutral or ground lug kit is installed. It can be field-modified to meet NEMA 3R rainproof requirements by opening a factory drain hole. Ensure proper wiring with #14-2 Cu/Al and configure as a three-pole, three-wire setup to meet system protection needs and NEC requirements.
The device provides a 30A amperage rating at 240V with three-pole operation. It is a fusible switch configured without a neutral, using Class H fuses. It is designed for 3-wire, 3-pole circuits and supports #14-2 Cu/Al conductors, ideal for protecting motors and control circuits in industrial panels.
Yes. It features a NEMA 12, NEMA 3R rated enclosure and painted galvanized steel construction, offering protection against dust and moisture. It can be field modified for rainproof use as needed, making it suitable for outdoor or rugged indoor applications in accordance with NEC and safety standards.
The DH321FDK is UL Listed and NEC barrier compliant, ensuring electrical safety and code compliance. It is designed for service entrances and industrial protection schemes, aligning with standard procurement and QA requirements for safety-critical equipment.
By delivering reliable isolation with Class H fuses and a robust enclosure, the DH321FDK reduces unplanned downtime and wear on downstream equipment. Its field-modifiable rainproof capability and compatibility with neutral/ground lug kits streamline maintenance planning, spare parts strategy, and panel uptime, delivering tangible reliability and operational cost benefits.