Eaton DFJ-4 High Speed Fuse - UL Listed Class J
Part Number: DFJ-4
Quick Summary
The Eaton DFJ-4 high speed fuse protects electrical systems in industrial controls by delivering rapid overcurrent interruption. This helps prevent nuisance trips, arc damage, and collateral equipment wear that drive up downtime and maintenance costs. Featuring UL Listed, CSA Certified, and CE RoHS compliance, the DFJ-4 meets essential safety and regulatory expectations for modern control panels and machinery. For engineers balancing protection with uptime, this Class J fuse offers reliable coordination with Bussmann clip-lock installations, compact packaging, and documented performance. In practice, choosing DFJ-4 translates to safer startups, predictable fuse behavior, and streamlined procurement across electrical protection and circuit control applications.
Product Information
Extended Description
DFJ-4 Eaton: Eaton Bussmann series DFJ high speed fuse, 600 Vac or less, 450 Vdc or less, 4A, 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-4
UPC
051712653237
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
4 A
Interrupt rating
100 kAIC 450 Vdc 200 kAIC at 600 Vac
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-4
DFJ-4~DRIVE FUSE
Datasheet - FNQ-30
Feature → Business Impact → Application: The DFJ-4 delivers a precise 4 A amperage rating, enabling targeted protection of control circuits without nuisance clearing, reducing equipment wear and unnecessary shutdowns in PLC panels and drive systems. This translates to measurable uptime gains in manufacturing lines and safer a/c motor protection in conveyors and packaging equipment. Feature → Business Impact → Application: With a high interrupt rating of up to 200 kAIC at 600 Vac and 100 kAIC at 450 Vdc, the DFJ-4 minimizes arc energy and protects downstream components during fault events, supporting compliance with strict electrical protection standards in machine assemblies. Feature → Business Impact → Application: Rated for up to 600 Vac or less and 450 Vdc or less, the fuse offers broad compatibility with common industrial systems, enabling seamless integration into standard Bussmann protector suites for control cabinets. Feature → Business Impact → Application: Clip-lock connections provide quick, secure installation and reliable contact under dynamic loads, reducing field install time and maintenance calls in panel setups and motor control centers. Feature → Business Impact → Application: The melamine tube and Class J form factor deliver robust thermal and mechanical performance in harsh environments, improving lifecycle cost by extending service intervals in automation enclosures. Feature → Business Impact → Application: A non-indicating fuse reduces nuisance indicators in crowded panels, avoiding false alarms while allowing maintenance staff to rely on standard signaling methods and documented diagnostic procedures; this supports lean operations in OEM and end-user facilities.
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FAQs
DFJ-4 uses a clip-lock connection designed for quick, secure panel mounting. When wiring, follow standard Bussmann practices, ensure clean terminations, and orient the fuse per enclosure guidelines to maintain proper heat dissipation and clear visual access for inspection.
The DFJ-4 is rated for 4 A with an interrupt rating of up to 200 kAIC at 600 Vac and 100 kAIC at 450 Vdc. Voltage rating is 600 Vac or less and 450 Vdc or less, making it suitable for typical industrial control and drive circuits.
Yes. The DFJ-4’s Class J design, high-speed interruption, and clip-lock mounting make it ideal for motor drives, inverters, and PLC-based control panels where fast fault clearing and compact form factor are essential.
DFJ-4 is UL Listed, CSA Certified, and CE marked with RoHS compliance, ensuring alignment with global safety and regulatory requirements for electrical protection components.
The fuse reduces downtime by delivering fast fault interruption, lowers arc-related damage, and simplifies procurement with standard Bussmann accessories. Its non-indicating design minimizes panel clutter, while reliable performance supports longer service intervals in automation environments.