Eaton DH221NDK Heavy Duty Fusible Safety Switch - UL Listed
Part Number: DH221NDK
Quick Summary
Eaton DH221NDK heavy duty fusible safety switch provides safe isolation for industrial machinery and control panels in rugged environments. This robust device helps protect personnel and equipment while enabling quick fault isolation during maintenance. Many engineers struggle to protect critical circuits while minimizing downtime in field installations that demand compact footprints, weather resistance, and straightforward maintenance. The unit is UL Listed and NEC 230.62 (C) compliant, with a NEMA 12/3R enclosure and the option to field-modify for NEMA 3R rainproof operation. With 30 A, 240 V operation and selectable HP ratings up to 7.5 hp in three-phase configurations, it aligns with motor protection and panel integration needs while reducing wiring complexity and lifecycle costs.
Product Information
Extended Description
DH221NDK Eaton: Eaton Heavy duty single-throw fused safety switch, Enhanced visible blade, 30 A, NEMA 12/3R, Class H, neutral, Two-pole, Three-wire, 240 V, Max Hp: 1.5, 3 hp/3, 7.5 hp/5 hp (1,3PH @ Std fuse/time delay/250 Vdc), #14-#2 Cu/Al
Product Name
Eaton heavy duty fusible safety switch
Catalog Number
DH221NDK
UPC
782113205397
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
Can be field modified to meetNEMA 3R rainproof requirements when a factory provided drain hole is opened. 3-phase hp ratings shown are grounded B phase ratings; UL listed.
Enclosure
NEMA 12, NEMA 3R
Enclosure material
Painted galvanized steel
Fuse class provision
Class H
Fuse configuration
Fusible with neutral
Number Of Poles
Two-pole
Number of wires
3
Type
Heavy duty fusible safety switch
Amperage Rating
30A
HP rating - max
1.5, 3 hp/3, 7.5 hp/5 hp (1,3PH @ Std fuse/time delay/250 Vdc)
NEMA rating
NEMA 12/3R
Voltage rating
240V
Product Category
Heavy Duty, Fusible with neutral
Feature: Heavy duty fusible switch with Class H fuse configuration. Business Impact: Provides robust overcurrent protection with precise coordination for motor circuits, reducing nuisance trips and improving uptime. Application: Ideal for motor starters and control panels in manufacturing environments where reliability is essential. Feature: NEMA 12/3R enclosure with painted galvanized steel construction. Business Impact: Delivers durable enclosure performance in indoor and outdoor spaces, resisting dust, water spray, and corrosion in demanding plants. Application: Suitable for panel-mounted installations and outdoor equipment enclosures where weather resistance matters. Feature: Neutral included with two-pole, three-wire configuration. Business Impact: Simplifies wiring, reduces component count, and speeds installation while maintaining proper circuit balance. Application: Common in conveyors, presses, and processing lines with shared neutral loads. Feature: 240 V operating voltage and 30 A rating with defined HP ranges. Business Impact: Enables direct motor protection with scalable horsepower options (up to 7.5 hp in 3P configurations), supporting standard plant motor loads and energy efficiency goals. Application: Fits standard motors in machine tools and material handling equipment. Feature: UL Listed and NEC barrier compliance. Business Impact: Supports regulatory compliance and safer panel assemblies, minimizing audit risk and warranty concerns. Application: Essential for code-compliant installations in industrial facilities. Feature: Field-modifiable for NEMA 3R rainproof capability. Business Impact: Extends usable life outdoors or in damp locations without replacing the switch, lowering total cost of ownership. Application: Outdoor conveyors and exposed machinery where rain or washdown is possible, with minimal downtime to modify.
Get a Quick Quote for a Eaton DH221NDK
Chat with us on WhatsApp - fast responses guaranteed
Need to speak with someone? We'll call you back within 2 hours during business hours
Interested in Eaton DH221NDK?
Enquire Now
FAQs
The DH221NDK uses a two-pole, three-wire configuration inside a NEMA 12/3R enclosure with dimensions of 20 in L, 9.5 in W, and 8.5 in H. It can be installed in standard electrical cabinets or on equipment frames and supports field modification to meet NEMA 3R rainproof requirements by opening the provided drain hole, enabling outdoor or damp-area use.
The DH221NDK provides a 30 A amperage rating at 240 V. HP ratings vary by configuration: 1.5 hp for certain single-phase setups, and 3 hp/3 hp, 7.5 hp/5 hp for select three-phase arrangements with standard fuse and time-delay characteristics at 250 V DC. This makes it suitable for a range of motor sizes in industrial applications.
Yes, with caveats. The standard enclosure is NEMA 12, but it can be field modified to meet NEMA 3R rainproof requirements when a drain hole is opened. This makes the DH221NDK suitable for outdoor or damp facilities, provided the field modification is performed per the catalog notes and installation practices are followed for weather exposure and safety.
The device is UL Listed and NEC 230.62 (C) compliant, with a field-modifiable path to rainproof operation via NEMA 3R adaptation. This combination supports regulatory conformity in most industrial facilities and provides confidence in safety and reliability during routine inspections and audits.
The product carries Eaton’s warranty policy 25-000, offering one year from installation or eighteen months from shipment, whichever occurs first. Combined with durable galvanized steel construction and a robust fuse-based protection strategy, this configuration minimizes maintenance costs and extends service life, delivering strong total cost of ownership benefits.