Eaton FNA-4/10 Fuse - Time-delay Dual Element, CE Marked
Part Number: FNA-4/10
Quick Summary
The FNA-4/10 fuse is a time-delay, dual-element device that protects inductive and electronic circuits in control panels. Engineers often battle nuisance trips and downtime during startups and signal conditioning; this fuse tolerates short surges while preserving protection. CE Marked compliance supports European installations, while its Bussmann-series design ensures compatibility with standard electrical protection practices. Beyond compliance, this fuse delivers reliable overload protection, long-cycle endurance, and easy ferrule-end wiring for fast panel integration. With 0.4 A operating current and 250 V rating, it protects sensitive electronics without excessive voltage drop, aiding engineers in meeting safety and uptime targets. In practice, technicians appreciate its compact 1.5 inch depth and ferrule-to-ferrule connection for straightforward field installation.
Product Information
Extended Description
FNA-4/10 Eaton: Eaton Bussmann series FNA fuse, Time-delay fuse, Inductive load circuits, Electronic circuits, 0.4 A, Dual, Non-indicating, Ferrule end x ferrule end, 35 AIC at 250 Vac, 10 kAIC at 125 Vac, Silver-plated pin, Standard, 250 V
Product Name
Eaton Bussmann series FNA fuse
Catalog Number
FNA-4/10
UPC
051712713399
Product Length/Depth
1.5 in
Product Height
0.406 in
Product Width
0.406 in
Product Weight
1.5 lb
Warranty
Not Applicable
Compliances
CE Marked
Amperage Rating
0.4 A
Interrupt rating
10 kAIC at 125 Vac 35 AIC at 250 Vac
Voltage rating
250 V
Material
Silver-plated pin
Number of elements
Dual
Packaging type
Standard
Connection
Ferrule end x ferrule end
Fuse indicator
Non-indicating
Special features
Superior overload and cycling capabilities
FNA-4/10~FNA-4-10~FUSETRON DUAL ELEMENT
FNA-4/10~FNA-4-10~FUSETRON DUAL ELEMENT
Eaton Specification Sheet - FNA-4/10
Time-delay protection reduces nuisance trips for inductive loads and enables smoother motor starting, improving line uptime in automated panels. This translates to fewer unplanned outages and lower maintenance costs when equipment ramps up under load. By matching the FNA-4/10 to motor controllers and conveyor drives, engineers gain predictable protection without sacrificing performance. Dual-element construction enhances cycling reliability by providing both overload and short-duration fault tolerance. In practice, this means longer fuse life under frequent cycling and fewer replacements in high-cycle environments. This reliability reduces spare part inventories and stabilizes production throughput. Electrical ratings of 0.4 A and 250 V, with a 10 kAIC at 125 Vac and 35 AIC at 250 Vac, deliver fast, predictable fault clearing for sensitive electronics without sacrificing protection. The time-delay characteristic tolerates startup surges from inductive loads while staying within safe limits. This makes the FNA-4/10 suitable for control panels, drives, and electronic interfaces in automation systems. Ferrule-end connections with silver-plated pins simplify installation and ensure reliable contacts in harsh environments. The standard packaging and 1.5 inch body depth, with 0.406 inch width, fit common fuse holders, enabling quick field swaps. This ease of wiring reduces assembly time and lowers the risk of misconnection. CE Marked compliance aligns with European safety standards and helps meet regulatory requirements across sites. The Bussmann-series design offers proven compatibility with a broad ecosystem of fuses and circuit protection devices, simplifying spares and replacements. For procurement, the FNA-4/10 fits into defined spec sheets and engineering BOMs. Overall, the FNA-4/10 fuse combines precise protection, easy installation, and durable performance to help engineers achieve uptime targets and compliant installations.
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FAQs
To install the FNA-4/10, remove power, locate the appropriate fuse holder, insert the ferrule-end leads fully into the holder, and reseat. Confirm 0.4 A rating matches your circuit and ensure supply is within 250 V. The dual-element design and silver-plated pins provide reliable contact and cycling performance. Use standard packaging and secure wiring before re-energizing.
FNA-4/10 is rated 0.4 A at 250 V with a time-delay characteristic designed for inductive loads. It provides an interrupt rating of 10 kAIC at 125 Vac and 35 AIC at 250 Vac, ensuring rapid fault clearing while accommodating startup surges. This combination supports safe protection for controllers, drives, and electronic circuits in control panels.
Yes. The FNA-4/10 is purpose-built for inductive loads such as motors and solenoids, as well as sensitive electronic circuits in automation panels. Its time-delay feature prevents nuisance trips on startup while still delivering fast clearing on true faults. The ferrule-end connections and silver-plated pins simplify wiring in standard fuse holders, improving reliability in demanding manufacturing environments.
The FNA-4/10 is CE Marked, aligning with European safety standards and EMC requirements. This certification supports compliance in EU installations and other regions seeking CE conformity. While batch-specific variations can occur, Eaton Bussmann's FNA-series is designed for consistent performance under regulatory requirements, aiding rapid qualification for new assemblies.
Long-term reliability is supported by a dual-element design and superior overload cycling, reducing the need for frequent replacements in high-cycle environments. The 1.5 inch body and ferrule-end connections simplify field maintenance and spare-part planning, lowering downtime and repair time. Expect lower total cost of ownership through fewer nuisance trips and stable production throughput.