Eaton DFJ-20 High Speed Fuse - 600 Vac / 450 Vdc, UL Listed
Part Number: DFJ-20
Quick Summary
The Eaton DFJ-20 high speed fuse protects industrial drive circuits by rapidly interrupting faults. This compact Class J fuse helps prevent motor and control-system damage while reducing downtime. It minimizes nuisance trips and costly production stoppages common in fast-acting protection schemes for conveyors, presses, and robotics. The DFJ-20 is UL Listed, CSA Certified, and CE Marked RoHS Compliant, aligning with stringent safety and environmental requirements for modern manufacturing. With a 20 A rating and ratings of up to 600 Vac or 450 Vdc, it provides reliable protection in demanding power environments. Its melamine tube construction and non-indicating design simplify installation and maintenance, supporting safer, maintenance-friendly protection schemes for engineers and procurement teams.
Product Information
Extended Description
DFJ-20 Eaton: Eaton Bussmann series DFJ high speed fuse, 600 Vac or less, 450 Vdc or less, 20A, 200 kAIC at 600 Vac, 100 kAIC 450 Vdc, Non Indicating, High speed fuse, Class J, Melamine tube
Product Name
Eaton Bussmann series DFJ high speed fuse
Catalog Number
DFJ-20
UPC
051712653305
Product Length/Depth
0.74 in
Product Height
2.27 in
Product Width
0.74 in
Product Weight
0.9 lb
Warranty
Not Applicable
Compliances
CE Marked RoHS Compliant
Certifications
UL Listed CSA Certified
Amperage Rating
20 A
Interrupt rating
200 kAIC at 600 Vac 100 kAIC 450 Vdc
Voltage rating
600 Vac or less, 450 Vdc or less
Material
Melamine tube
Packaging type
Standard
Class
Class J
Fuse indicator
Non Indicating
Bussmann series complete full line catalog no. 1007
Eaton Specification Sheet - DFJ-20
DFJ-20~DRIVE FUSE
Datasheet - FNQ-30
High-speed protection delivering rapid fault interruption reduces incident energy and safeguards downstream equipment such as drives, motors, and control panels, resulting in measurable uptime gains and lower repair costs. This translates to improved line efficiency and reduced unplanned downtime in demanding manufacturing environments where every millisecond matters. The DFJ-20’s 20 A amperage rating, 600 Vac or 450 Vdc voltage capability, and 200 kAIC/100 kAIC interrupt ratings empower engineers to select a protective device that matches high- current motor drives and fast-acting control circuits, minimizing fuse nuisance and improving system reliability. The Class J construction with a melamine tube offers robust thermal stability and mechanical integrity in panel mounting, simplifying replacement during routine maintenance and reducing field service time. The non-indicating design reduces panel complexity and cost, while standard packaging supports straightforward procurement and stock management for maintenance teams. Compatibility with the Bussmann DFJ family ensures easy substitution in existing panels and consistent protection across legacy equipment, easing design-in and future upgrades. Compliance with CE, RoHS, UL, and CSA standards further reduces regulatory risk during audits and new builds, reinforcing a safety-first approach for industrial automation projects. In practice, users commonly pair the DFJ-20 with motor drives and conveyor controls in automation lines where compact form factor and reliable fast-acting protection are essential for safe, efficient operations.
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FAQs
The DFJ-20 is designed with a compact footprint (0.74 in length and width, 2.27 in height) to fit standard industrial control panels. It uses a Melamine tube construction and a non-indicating design to simplify panel layout and maintenance. For installation, ensure compatible chassis or fuse holders in the Bussmann DFJ family and observe proper clearance for heat dissipation in enclosed panels. Replacement is straightforward due to its standard form factor and UL/CSA-listed construction, reducing commissioning time in new builds and retrofits.
The DFJ-20 is rated for 20 A with a voltage rating of 600 Vac or less and 450 Vdc or less. It provides an interrupt rating of 200 kAIC at 600 Vac and 100 kAIC at 450 Vdc, enabling robust protection for heavy-duty motors and drives. This combination supports reliable short-circuit interruption in demanding industrial environments, while remaining compatible with common industrial power supplies and control circuitry.
Yes. The DFJ-20 supports fast fault interruption essential for motor drives, robotics, and conveyors. Its 20 A rating and high interrupt levels protect costly equipment from rapid overcurrent events, reducing arc energy and downstream damage. The Class J fuse’s compact size and Melamine tube construction suit tight control panels and harsh industrial environments, making it a practical choice for new installations and panel refurbishments.
The DFJ-20 is UL Listed, CSA Certified, and CE Marked with RoHS compliance. These certifications confirm safety, environmental responsibility, and regulatory compliance for international deployments. Maintaining these certifications simplifies audits and supports compliance-driven procurement, especially in industries with strict regulatory requirements such as food processing, packaging, and automotive manufacturing.
The DFJ-20’s non-indicating design reduces failure points and lowers maintenance overhead since no indicator contact points require replacement. Standard packaging and compatibility with the Bussmann DFJ family simplify stocking and procurement, reducing lead times. Long-term reliability, UL/CSA/CE compliance, and a robust melamine tube contribute to lower downtime and fewer field failures, delivering favorable total cost of ownership in high-demand automation environments.