Eaton DFJ-300 High Speed Fuse - 200 kAIC at 600 Vac
Part Number: DFJ-300
Quick Summary
The Eaton DFJ-300 high speed fuse is designed to provide fast overcurrent protection for motor drives, switchgear, and power distribution panels. End users often battle nuisance trips and costly downtime caused by protection devices that are slow to react or poorly matched to load profiles. The DFJ-300 carries CSA Certified and UL Listed marks, and is CE marked RoHS compliant, supporting regulatory compliance across global installations. With a Class J rating, clip-lock connection, and a melamine tube, it installs quickly, minimizes maintenance, and simplifies spare-part planning in industrial automation environments. This combination supports reliable protection in machine control panels and energy systems while remaining compatible with clip-lock terminations and standard Bussmann-series catalogs.
Product Information
Extended Description
DFJ-300 Eaton: Eaton Bussmann series DFJ high speed fuse, 600 Vac or less, 450 Vdc or less, 300A, 200 kAIC at 600 Vac, 100 kAIC 450 Vdc, Non Indicating, High speed fuse, Clip-lock, Class J, Melamine tube
Product Name
Eaton Bussmann series DFJ high speed fuse
Catalog Number
DFJ-300
UPC
051712653497
Product Length/Depth
7 in
Product Height
2 in
Product Width
2 in
Product Weight
1.52 lb
Warranty
Not Applicable
Compliances
CE Marked RoHS Compliant
Certifications
CSA Certified UL Listed
Amperage Rating
300 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
Connection
Clip-lock
Fuse indicator
Non Indicating
Bussmann series complete full line catalog no. 1007
Eaton Specification Sheet - DFJ-300
DFJ-300~DRIVE FUSE
Datasheet - FNQ-30
High-speed protection with 300 A rating provides fast fault isolation, reducing arc damage and downtime in motor drives, servo drives, and power electronics. This translates to improved equipment uptime and lower maintenance costs in automated production lines, while meeting stringent IEC/UL safety expectations. The DFJ-300 supports global deployments thanks to its UL Listed, CSA Certified, and CE RoHS compliant profile, easing procurement and regulatory audits. Its clip-lock, Class J construction enables quick, secure field installation and reliable long-term performance in crowded electrical cabinets, minimizing rework and training needs for maintenance staff. The melamine tube and standard packaging simplify stock management for OEMs and integrators, aligning with Bussmann-series inventories for streamlined sourcing. Non-indicating operation reduces visual fatigue during routine checks without sacrificing protection reliability. Overall, this fuse balances protection speed, installation ease, and regulatory compliance for demanding industrial environments.
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FAQs
For new panel installations, ensure the DFJ-300 is mounted on a flat, unobstructed surface that accommodates its 7 in length and 2 in width. Use the clip-lock connections for a quick, secure fit and verify proper orientation to avoid misalignment. Maintain clearance around the melamine tube to prevent heat buildup, and keep compatible Bussmann series parts on hand for fast spare replacement.
The 200 kAIC interrupt rating indicates the fuse can safely interrupt high fault currents without arcing or damage in 600 Vac systems, protecting motor drives and power electronics. This capability reduces equipment damage, minimizes downtime after a fault, and supports feeder protection in harsh industrial environments, making it a robust choice for high-load automation skids.
Yes, the DFJ-300 is rated for 450 Vdc or less in addition to 600 Vac or less. This enables protection for many DC bus applications, including some servo drives and battery-powered controls. When using DC, confirm that the fault current and system voltage align with the 300 A rating and the 100 kAIC (450 Vdc) capability for safe interruption.
DFJ-300 carries UL Listed, CSA Certified status, and CE Mark RoHS compliance, which simplifies cross-border procurement and supplier qualification. These certifications support regulatory acceptance in North America and Europe, reduce risk during audits, and help engineers meet industry standards for motor protection, machine safety, and environmental compliance. Having these marks streamlines procurement, reduces supplier qualification time, and supports global OEMs shipping to multiple regions.
Maintenance teams should store DFJ-300 spares in standard inventory and verify clip-lock terminals at replacement time. Because this model is non-indicating, confirm the load current and fault history from drive logs to avoid unnecessary replacements. When a fault occurs, replace with an identical DFJ-300 part, recheck torque on connections, and record the event for compliance.