FNA-15

Response Time:	Slow
Package / Case:	Cylindrical, Alarm Indicating
Mounting Type:	Holder
Breaking Capacity @ Rated Voltage:	10kA
Operating Temperature:	--
Approvals:	CE, CSA, UL
Class:	--
Features:	Indicating
Applications:	Electrical, Industrial
Series:	FNA
Voltage Rating - AC:	125V
Current Rating:	15A
Fuse Type:	Cartridge
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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Introduction

FNA-15 is an auto reset thermal current-limiting fuse specifically designed for overcurrent protection of electronic appliances in the automotive industry. It is a Miniature-sized "radial-leaded" thermally de-rated fuse featuring high breaking capacity due to its large physical size and is mainly used in circuit protection applications in automobiles and other electronic appliances.

Application Field of FNA-15

In applications such as automotive power distribution systems, FNA-15 provides reliable and secure protection against current overloads and short circuits. Its unique current control device design provides additional protection for current control circuits, such as breaker points, and additional protection for transformers and power supplies.The FNA-15 has been engineered to protect several different electronic devices, including: ECU\'s, LEDs, batteries, and power modules. This fuse is also designed to handle large inrush current and starts quickly when faced with an overload. Additionally, the FNA-15 can also inhibit against heat migration through its insulation wrap. For automotive power management systems, it provides dramatically increased circuit protection in all types of vehicles. Furthermore, the fuse is ideal for use with electronic devices in industrial appliances, machines, power tools, communications systems, energy generation systems, renewable energy systems, and other commercial applications in many industries.

Working Principle of FNA-15

The FNA-15 has a unique current control device design that uses a combination of a heating element and a temperature sensing element. The heating element and the temperature sensing element work together to regulate the amount of current that flows through the circuit.When the current that passes through the fuse exceeds its rated value, the heating element begins to heat up and the temperature sensing element detects the increased temperature. When both the elements detect the increase in temperature, the temperature sensing element triggers the thermal reset switch and the fuse is switched off, thus, preventing the current from passing through the circuit.Once the temperature is cooled down, the temperature sensing element triggers the thermal reset switch again and the fuse is switched back on, thus, allowing current to pass through the circuit. This process ensures that the current passing through the circuit remains within the safe limits.

Conclusion

The FNA-15 is specifically designed to provide overcurrent protection for automotive electronic devices, as well as industrial appliances. It is designed to protect against large inrush currents, short circuits, and heat migration. Its unique current control device design ensures that the current passing through the circuit remains within the safe limits.

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