Eaton DFJ-40 High Speed Fuse - UL Listed, 600 Vac
Part Number: DFJ-40
Quick Summary
DFJ-40 high speed fuse protects motor drives and control circuits in industrial automation. Nuisance trips and hard-to-read fault indicators can slow downtime, making quick fault isolation essential. It carries UL Listed and CSA Certified markings, plus CE Marked RoHS compliance, ensuring regulatory alignment for our customers. Designed as a Class J, clip-lock device with a melamine tube, it supports fast installation and reliable protection across panel-mounted systems. With a 40 A rating and voltages up to 600 Vac or 450 Vdc, the DFJ-40 helps reduce maintenance costs while maintaining safe, compliant electrical protection.
Product Information
Extended Description
DFJ-40 Eaton: Eaton Bussmann series DFJ high speed fuse, 600 Vac or less, 450 Vdc or less, 40A, 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-40
UPC
051712653343
Product Length/Depth
2 in
Product Height
1 in
Product Width
1 in
Product Weight
0.169 lb
Warranty
Not Applicable
Compliances
CE Marked RoHS Compliant
Certifications
UL Listed CSA Certified
Amperage Rating
40 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
Feature: 600 Vac / 450 Vdc compatibility with fast response. Business Impact: Enables rapid fault interruption in drives and power conversion equipment, reducing arc exposure and collateral damage. Application: Motor drives, variable frequency drives, and panel protection in harsh industrial environments. Feature: 40 A rating with 200 kAIC at 600 Vac (100 kAIC at 450 Vdc). Business Impact: Supports high inrush and fault currents while minimizing unplanned downtime and repair costs. Application: Heavy-load feeders, drive circuits, and protection across control panels where high fault current is a concern. Feature: Clip-lock connection, Class J form factor, melamine tube. Business Impact: Simplifies installation on standard fuse holders, enhances vibration resistance, and provides a compact footprint for crowded panels. Application: Retrofit projects and new installations in compact electrical panels. Feature: Compliance and markings (UL Listed, CSA Certified, CE RoHS). Business Impact: Streamlines procurement for regulated facilities and eases audit readiness with clear safety data. Application: Industrial facilities with strict regulatory requirements and sustainability targets. Feature: Non-indicating fuse design with reliable non-indicating operation. Business Impact: Reduces upfront indicator maintenance while encouraging proper control-system monitoring for timely fault notification. Application: Safe, cost-conscious protection in drive and control circuits where status indicators are managed by the system.
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FAQs
The DFJ-40 uses a clip-lock connection and is designed for Class J fuse bases, ensuring quick, tool-free installation in compatible holders. Its compact 2 in long, 1 in × 1 in footprint supports dense panel layouts while maintaining secure electrical contact and vibration resistance. For retrofit projects, verify holder compatibility and ensure clip-lock alignment with the existing bus and mounting rails.
The DFJ-40 provides 40 A continuous amperage with an interrupt rating of 200 kAIC at 600 Vac and 100 kAIC at 450 Vdc, with a voltage rating up to 600 Vac or 450 Vdc. This combination supports high inrush protection and fast fault interruption in motor drives and drive-powered panels, helping minimize arc damage and downtime.
Yes. The DFJ-40 is explicitly designed for motor drives, inverters, and panel protection in industrial automation. Its Class J construction, clip-lock mounting, and Melamine tube provide robust protection in drive circuits while meeting UL Listed, CSA Certified, and CE RoHS requirements, making it a dependable choice for MCCs and drive retrofits.
The DFJ-40 is UL Listed, CSA Certified, and CE RoHS Compliant. These certifications validate safety and environmental compliance, simplify procurement for regulated facilities, support regulatory audits, and enhance supplier qualification for energy, automation, and safety standards across facilities.
The non-indicating design reduces indicator maintenance costs, while the clip-lock and Class J form factor speed installation and servicing. Coupled with a robust 40 A / 600 Vac protection profile, it delivers reliable protection with predictable replacement cycles, potentially lowering total cost of ownership in drive and panel systems.