Eaton DH221NRK Heavy Duty Fusible Safety Switch - NEMA 3R
Part Number: DH221NRK
Quick Summary
Eaton heavy duty fusible safety switch protects motors and circuits in industrial panels. Downtime and mis-wiring can derail critical production, so you need a reliable, easy-to-install protection device. Certified for safety and durability, it carries UL Listed and CSA Certified markings and features a rugged NEMA 3R enclosure for outdoors or harsh environments. Designed for 240V systems, it supports two-pole, three-wire configurations with a fusible neutral and aligns with Class H fuses for enhanced protection. The unit’s robust construction reduces maintenance costs while delivering predictable shutoff performance. This translates to improved uptime, easier compliance reporting, and long-term energy efficiency.
Product Information
Extended Description
DH221NRK Eaton: Eaton enhanced visible blade single-throw fused safety switch, 30 A, NEMA 3R, Painted galvanized steel, Class H, Fusible with 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)
Product Name
Eaton heavy duty fusible safety switch
Catalog Number
DH221NRK
UPC
782113205359
Product Length/Depth
16.5 in
Product Height
8.31 in
Product Width
9.12 in
Product Weight
13.6 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 CSA Certified
Catalog Notes
3-Phase hp ratings shown are grounded B phase ratings; UL listed
Enclosure
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 3R
Voltage rating
240V
Product Category
Heavy Duty, Fusible with neutral
UL Listed and CSA Certified status delivers immediate compliance assurance, reducing regulatory risk and simplifying audits. The DH221NRK uses a Class H fuse and a fusible with neutral configuration for precise overcurrent protection across 240V, 3-wire motor feeds. This combination supports safe, code-compliant operation in manufacturing, packaging, and material handling lines. NEMA 3R enclosure, painted galvanized steel, offers rugged outdoor durability and resistance to dust and moisture. It stands up to washdowns and exposure in outdoor yards, switch rooms, and dusty production floors. This reduces corrosion risk and extends service life while ensuring dependable protection even in tough environments. Two-pole, three-wire design with neutral simplifies wiring and minimizes misconnection during installation. Paired with a 30A rating, this arrangement delivers reliable motor safeguarding with predictable trip characteristics and accurate fault isolation. The fusible configuration supports selective coordination in multi-motor systems. Front-access installation and a compact footprint fit neatly into control cabinets and service bays. With dimensions of 16.5 in depth, 9.12 in width, and 8.31 in height, and a weight of 13.6 lb, it enables quicker assembly and easier field maintenance without sacrificing rigidity or safety. HP ratings cover a broad range: 1.5 hp for single-phase, 3 hp for standard 3-phase configurations, and up to 7.5 hp or 5 hp depending on phase arrangement at 250 Vdc. This versatility reduces the number of SKUs needed and streamlines spare parts management for mixed line operations. Warranty and service terms add long-term value: one year from installation or eighteen months from shipment, whichever comes first. Eaton’s global support network offers replacement parts, field wiring guidance, and preventative maintenance recommendations to sustain uptime and lower total cost of ownership.
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FAQs
For 240V 2-pole 3-wire installations, mount the DH221NRK in a NEMA 3R enclosure and ensure front-access wiring for quick service. Use a neutral connection where required by the fusible-with-neutral configuration, and verify proper overcurrent protection with Class H fuses. Leave appropriate clearance for heat dissipation and service access, and follow the included wiring diagram for correct phase and ground connections.
Key performance specs include a 30A amperage rating, 240V voltage rating, NEMA 3R enclosure, two-pole three-wire configuration with neutral, fusible with neutral, and Class H fuse provisions. The device supports HP ratings up to 1.5 hp (single-phase) and up to 3 hp/7.5 hp depending on phase configuration at 250 Vdc, enabling reliable motor protection across multiple applications.
Yes. The DH221NRK uses a NEMA 3R enclosure made of painted galvanized steel, designed for outdoor and harsh indoor environments. This construction provides dust and moisture resistance, reducing corrosion risk and extending service life in yards, loading docks, and exposed industrial spaces while maintaining safe operation.
The DH221NRK is UL Listed and CSA Certified, indicating conformity to recognized safety standards. These certifications help facilities meet regulatory requirements, simplify audits, and support safe electrical installations in line with national and regional codes for industrial protection devices.
The DH221NRK comes with Eaton’s warranty terms: one year from installation or eighteen months from shipment, whichever occurs first. Long-term value is augmented by reliable protection, low maintenance needs, availability of spare parts, and access to Eaton’s support network for troubleshooting, field wiring guidance, and replacements when needed.