Eaton DH321FDKJ Heavy Duty Fusible Safety Switch - UL Listed
Part Number: DH321FDKJ
Quick Summary
Eaton heavy duty fusible safety switch provides reliable electrical protection for industrial panels and motors. It helps reduce downtime and maintenance headaches by delivering safe fuse isolation and straightforward replacement in demanding environments. UL Listed with NEC barrier compliance and a rugged NEMA 12/3R enclosure, it meets harsh industrial standards and supports long service life. With a 30A rating at 240V and three-pole operation, it aligns with common motor loads while preserving wiring flexibility using #14-2 Cu/Al. This translates to faster commissioning, safer lockout/tagout procedures, and lower total cost of ownership for facilities investing in compliant protection.
Product Information
Extended Description
DH321FDKJ Eaton: Eaton Heavy duty single-throw fused safety switch, 30 A, NEMA 12/3R, Painted galvanized steel, Class J, 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
DH321FDKJ
UPC
782114632154
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
Enclosure
NEMA 12, NEMA 3R
Enclosure material
Painted galvanized steel
Fuse class provision
Class J
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
Three-pole, three-wire configuration provides a dedicated protection and isolation path for three-phase motors, simplifying control wiring and ensuring correct phasing. Business impact: reduces wiring errors and improves overall safety in motor control applications. Application: ideal for panel builders and machine integrators deploying 3-phase drives in manufacturing lines. NEMA 12/3R enclosure with painted galvanized steel offers robust protection against dust and moisture, extending service life in harsh environments. Business impact: minimizes corrosion risk and maintenance costs. Application: wash-down areas and dusty facilities where enclosure integrity matters. Fuse class provision with Class J fusing and fusible without neutral delivers selective protection and simplified field replacement. Business impact: lowers spare parts inventory and improves fault isolation. Application: standard motor circuits and equipment feeds in industrial plants. 240V operation with 30A rating supports common motor loads up to 7.5 HP in three-phase service, while 1.5 HP ratings for certain configurations provide flexible usage. Business impact: expands compatibility across a wide range of motors, reducing the need for additional equipment. Application: HVAC fans, conveyors, pumps, and processing machinery. UL Listed certification and NEC 230.62 barrier compliance reinforce regulatory adherence and workplace safety. Business impact: helps maintain compliance during audits and accelerates project sign-off. Application: electrical protection in utility rooms and control panels. The enclosure’s physical specs—20 in depth, 9.5 in width, 8.5 in height—along with a 22 lb weight support straightforward installation and mounting in standard enclosures. Business impact: faster installation, easier handling, and improved space planning on shop floors. Application: retrofit projects or new builds with constrained footprints. The combination of heavy-duty construction, Class J fusing, and three-wire design aligns with industry best practices for durable, maintainable protection without neutral in control circuits. Business impact: reduces total cost of ownership and enhances long-term reliability. Application: general purpose industrial protection across sectors such as material handling, packaging, and processing.
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FAQs
DH321FDKJ is a three-pole, three-wire unit rated for 30A at 240V and uses #14-2 AWG Cu/Al conductors. It fits standard industrial panels and motor control circuits that require fusible protection without a neutral. Its NEMA 12/3R enclosure supports installation in typical mechanical rooms and controls cabinets, reducing rework during retrofits.
Key specs include a 30A amperage rating, 240V voltage rating, and a HP range of 1.5 and up to 7.5 HP for three-phase (TD) configurations. It is a three-pole device with fusible without neutral and Class J fuse provision, designed for reliable continuous operation in industrial environments.
Yes. The DH321FDKJ provides dedicated motor protection with a three-pole, three-wire design, 240V operation, and a Class J fuse. The NEMA 12/3R enclosure protects against dust and moisture, making it well suited for conveyors, pumps, and other factory motors while enabling safe isolation during maintenance.
The switch is UL Listed and includes NEC 230.62 barrier compliance for safe electrical installations. Its NEMA 12/3R enclosure rating provides environmental protection suitable for industrial settings, and it supports robust safety practices in control panels and switchgear assemblies.
Eaton provides a one-year warranty from installation or eighteen months from shipment under policy 25-000, whichever occurs first. For repairs, replacements, and technical assistance, consult Eaton’s support resources or your authorized distributor to ensure timely service and guidance during commissioning and maintenance.