Eaton FNA-4 Fuse - Time-Delay Dual-Element, CE Marked
Part Number: FNA-4
Quick Summary
The Eaton FNA-4 fuse provides time-delay protection for inductive and electronic circuits in industrial control panels. Nuisance startup trips and inrush surges can derail production, driving unplanned downtime and maintenance costs. CE marking confirms European safety compliance, and the device delivers high interrupt ratings—10 kAIC at 125 Vac and 200 kAIC at 250 Vac—for demanding loads. This combination supports reliable panel design, minimizes replacement cycles, and reduces total cost of ownership for OEMs and system integrators.
Product Information
Extended Description
FNA-4 Eaton: Eaton Bussmann series FNA fuse, Time-delay fuse, Inductive load circuits, Electronic circuits, 4 A, Dual, Non-indicating, Ferrule end x ferrule end, 10 kAIC at 125 Vac, 200 kAIC at 250 Vac, Silver-plated pin, Standard, 250 V
Product Name
Eaton Bussmann series FNA fuse
Catalog Number
FNA-4
UPC
051712713566
EAN
5027590060103
Product Length/Depth
0.35 in
Product Height
1.46 in
Product Width
0.35 in
Product Weight
0.1 lb
Warranty
Not Applicable
Compliances
CE Marked
Amperage Rating
4 A
Interrupt rating
10 kAIC at 125 Vac 200 kAIC 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
Bussmann series complete full line catalog no. 1007
Eaton Specification Sheet - FNA-4
FNA-4~FUSETRON DUAL-ELEMENT INDICATING
Datasheet - FNQ-30
Time-delay, dual-element design reduces nuisance trips by accommodating short inrush and startup surges, improving system uptime and protecting delicate electronics in industrial control panels. This translates to fewer interruptions in motor starters and PLC power rails, enabling more consistent production schedules and lower maintenance costs. The 4 A rating at 250 V provides precise protection for small to mid-size control circuits, preventing overcurrent while maximizing component life and energy efficiency. A high interrupt rating of 10 kAIC at 125 Vac and 200 kAIC at 250 Vac ensures safe fault interruption in demanding equipment such as drives and transformers, reducing the risk of equipment damage. Ferrule-end connections and silver-plated pins deliver robust, low-resistance terminations that resist vibration and corrosion, supporting reliable installations in harsh environments. The non-indicating fuse indicator minimizes false alarms in crowded control panels, while the standard packaging and compatibility with Eaton Bussmann catalogs streamline sourcing and replacements. Overall, the FNA-4 combines overload tolerance with cycling capability, offering a compact yet resilient solution for panel builders seeking predictable performance and lower lifecycle costs.
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FAQs
To install the FNA-4, use a standard fuse holder or terminal block designed for ferrule-end connections. The ferrule-end terminals mate securely with typical panel wiring, and the silver-plated pins provide low contact resistance for reliable operation. Ensure correct orientation and secure crimping, then verify circuit continuity before energizing the panel to prevent misconnection or overheating.
The FNA-4 is designed for inductive and electronic loads in 250 V systems. Its time-delay (dual-element) construction tolerates startup surges and brief overloads without nuisance tripping, making it ideal for motor starters, relays, and control circuits where inrush is common and uptime is critical.
Yes. The FNA-4 is CE Marked, indicating compliance with European safety standards. This makes it suitable for panels and equipment deployed in the European market. Always verify regional requirements for specific installations and ensure compatible enclosure and wiring practices align with CE expectations.
The FNA-4 provides a 10 kAIC interrupt rating at 125 Vac and 200 kAIC at 250 Vac. A high interrupt rating reduces the risk of catastrophic failure during short-circuit events, protecting downstream equipment and improving overall panel safety and reliability in demanding industrial environments.
Using the FNA-4 can lower total cost of ownership by reducing downtime from nuisance trips, extending fuse life through superior overload handling, and simplifying sourcing with standard Ferrule-end connections. In addition, its robust interrupt performance minimizes equipment damage risks, delivering predictable maintenance windows and improved system reliability.