Eaton DH321NRK Heavy Duty Fusible Safety Switch - NEMA 3R
Part Number: DH321NRK
Quick Summary
Eaton DH321NRK is a heavy-duty fusible safety switch for three-phase motor control in industrial settings. It helps reduce downtime caused by fused contacts or unclear switch status during servicing. This unit carries UL Listed certification and a NEMA 3R enclosure, with a Class H fuse provision for reliable protection in 240 V systems. Designed for compatibility with standard wiring practices and common industrial control panels, it supports efficient installation and predictable maintenance, helping engineers manage spare parts and service intervals more effectively.
Product Information
Extended Description
DH321NRK Eaton: Eaton Enhanced visible blade single-throw safety switch, 30 A, NEMA 3R, Painted galvanized steel, Class H, Fusible with neutral, Three-pole, Four-wire, 240 V, Max Hp: 1.5, 3/ 3, 7.5/ 5 hp (1,3PH @Std/TD, 250 Vdc), #14-#2 Cu/Al
Product Name
Eaton heavy duty fusible safety switch
Catalog Number
DH321NRK
UPC
782113205373
Product Length/Depth
16.5 in
Product Height
16.27 in
Product Width
9.5 in
Product Weight
14.11 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 3R
Enclosure material
Painted galvanized steel
Fuse class provision
Class H
Fuse configuration
Fusible with neutral
Number Of Poles
Three-pole
Number of wires
4
Type
Heavy duty fusible safety switch
Wire size
#14-2 AWG Cu/Al
Amperage Rating
30A
HP rating - max
1.5, 3/ 3, 7.5/ 5 hp (1,3PH @Std/TD, 250 Vdc)
NEMA rating
NEMA 3R
Voltage rating
240V
Product Category
Heavy Duty, Fusible with neutral
The DH321NRK delivers a 30A amperage rating for robust motor protection in demanding environments, enabling safe isolation and consistent performance across industrial applications. In a three-pole, four-wire configuration, it supports standard motor circuits while enabling straightforward troubleshooting and service, reducing unplanned downtime. The NEMA 3R enclosure, crafted from painted galvanized steel, withstands outdoor and damp conditions, improving reliability in outdoor equipment or plant floors. Fusible with neutral wiring and Class H fuse provision give precise protection for both line and neutral conductors, supporting compliant, safer control of energy-intensive loads. Its compact footprint (16.5 in L x 16.27 in H x 9.5 in W) and weight of 14.11 lb simplify installation and retrofits in existing panels. UL Listed certification reinforces regulatory compliance while controlling total cost of ownership through long-term durability and readily available spare parts.
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FAQs
Yes. The DH321NRK is a three-pole, four-wire safety switch rated for 30A at 240V. It uses a fusible with neutral configuration, making it suitable for maintaining motor protection across standard 3-phase circuits in industrial environments, while remaining easy to source and service with common spare parts.
The unit uses a NEMA 3R enclosure constructed from painted galvanized steel, offering protection against rain and corrosion. For installation, ensure proper mounting clearance, earth grounding per code, and wiring with #14-2 AWG Cu/Al. Its dimensions (16.5 in L, 16.27 in H, 9.5 in W) and weight (14.11 lb) support straightforward retrofits.
This switch is UL Listed and designed with a NEMA 3R enclosure, and it provides a Class H fuse provision. UL Listing confirms electrical safety compliance, the NEMA 3R rating supports outdoor or damp environments, and the Class H fuse ensures appropriate protection levels for the connected load, helping meet regulatory and safety requirements for industrial installations.
HP ratings for the DH321NRK are 1.5, 3/3, and 7.5/5 hp (1,3PH @Std/TD, 250 Vdc), reflecting different operating configurations. The device is fusible with neutral, which enables safe control of both line and neutral conductors in 240V systems, making it suitable for a range of motor applications in conveyors, pumps, and processing equipment.
Eaton’s policy 25-000 provides a one-year warranty from installation or eighteen months from shipment, whichever occurs first. This safety switch helps reduce downtime through reliable isolation, supports quicker maintenance cycles with UL Listed and NEMA 3R protection, and can lower spare parts and service costs by using standard wiring practices and widely available components.