Eaton JJN-40 Fuse - Class T, 20 kAIC at 160 Vdc
Part Number: JJN-40
Quick Summary
The Eaton JJN-40 fuse is a current-limiting device designed for VFD line protection in industrial drives. It helps engineers avoid nuisance tripping and damage from fault currents during motor starting and dynamic braking. The product carries CE and RoHS compliance with Class T protection, and delivers robust interrupt ratings. With a 40 A rating and proven performance in European and North American panels, it supports reliable drive protection and regulatory compliance. This is ideal for OEMs and maintenance teams seeking fast installation and predictable lifecycle costs for motor-control applications. Designed for panel installers, its ferrule-end connections simplify wiring and reduces field error. In demanding environments, the fuse supports 300 Vac and 160 Vdc ratings to accommodate mixed utility environments.
Product Information
Extended Description
JJN-40 Eaton: Eaton Bussmann series JJN fuse, Current-limiting, VFD line protection, 40 A, Class T, Non-indicating, Ferrule end x ferrule end, 20 kAIC at 160 Vdc, 200 kAIC at 300 V, Standard, 10, 300 V, 160 Vdc
Product Name
Eaton Bussmann series JJN fuse
Catalog Number
JJN-40
UPC
051712627405
Product Length/Depth
0.88 in
Product Height
0.56 in
Product Width
0.56 in
Product Weight
0.2 lb
Warranty
Not Applicable
Compliances
CE Marked RoHS Compliant
Amperage Rating
40 A
Interrupt rating
20 kAIC at 160 Vdc 200 kAIC at 300 Vac
Voltage rating
300 Vac, 160 Vdc
Packaging type
Standard
Class
Class T
Connection
Ferrule end x ferrule end
Fuse indicator
Non-indicating
Quantity
10
Low Voltage Branch Circuit Fuse Chapter
Low Voltage Branch Circuit Fuse Chapter
RoHS Search Tool
Bussmann series Fuseology
JJN-100~TRON FAST ACTING FUSE CLASS T
Feature: Current-limiting protection minimizes fault energy and protects drive electronics during fault or startup transients. Business impact: This reduces hardware damage, extends inverter life, and lowers downtime costs in high-speed manufacturing lines. Application: Ideal for VFD line protection in motor drives and automation panels where fast fault interruption is critical. Feature: 40 A amperage rating with Class T characteristics provides predictable protection without nuisance trips under normal loads. Business impact: Keeps production running while maintaining safe disconnects, enabling lean maintenance cycles. Application: Suitable for line-side protection in DC bus and AC input paths of servo drives. Feature: High interrupt ratings of 20 kAIC at 160 Vdc and 200 kAIC at 300 Vac offer headroom for fault currents in panels and feeders. Business impact: Reduces the risk of cascading failures and improves protection coordination with upstream breakers. Application: Process automation, packaging lines, and machine controls with high inrush loads. Feature: Ferrule-end x ferrule-end termination ensures secure, vibration-resistant wiring and straightforward field installation. Business impact: Faster panel assembly, fewer retightening issues, and lower maintenance overhead. Application: OEM manufacturing cells and retrofit projects demanding reliability and ease of service. Feature: CE Marking and RoHS compliance simplify regulatory acceptance across European and other markets; standard packaging supports stocking and BOM planning. Business impact: Streamlined procurement, improved audit readiness, and predictable lifecycle costs. Application: Global manufacturing environments with strict compliance needs.
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FAQs
Install the JJN-40 with ferrule-end terminations into properly rated fuse holders. Verify the 40 A rating matches the panelās drive or inverter input requirements, and ensure secure crimp connections to minimize resistance and vibration effects. Follow manufacturer torque guidelines and keep within the 300 Vac / 160 Vdc voltage ratings for safe operation.
The JJN-40 combines current-limiting action with Class T protection, delivering fast fault interruption while preventing nuisance trips under normal load. Its 40 A rating is matched to motor drives and inverter inputs, and the ferrule-end connections simplify assembly in control panels.
Yes. The JJN-40 fuse is CE marked and RoHS compliant, aligning with European regulatory requirements. This helps manufacturers meet compliance during design reviews, audits, and regional deployments without needing additional substitutions.
The JJN-40 is rated for 300 Vac and 160 Vdc, with interrupt ratings of 20 kAIC at 160 Vdc and 200 kAIC at 300 Vac. These specifications support protection in high-inrush and fault conditions typical of motor drives and automation panels.
Using the JJN-40 can reduce downtime by limiting fault energy and preventing cascade failures, while simplifying panel assembly with ferrule ends. The combination of robust protection, regulatory compliance, and standard packaging (10-pack) supports faster commissioning, easier stocking, and lower lifecycle costs for OEMs and maintenance teams.