FNA-1-1/4

Applications:	Electrical, Industrial
Size / Dimension:	0.406" Dia x 1.500" L (10.31mm x 38.10mm)
Package / Case:	Cylindrical, Alarm Indicating, 5AG, 10x38.1mm
Mounting Type:	Holder
Breaking Capacity @ Rated Voltage:	200A
Operating Temperature:	--
Approvals:	CE, CSA, UL
Class:	--
Features:	Indicating
Series:	FNA
Response Time:	Slow
Voltage Rating - AC:	250V
Current Rating:	1.25A
Fuse Type:	Cartridge
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

Introduction

The FNA-1-1/4 is an especially designed specialty fuse that is widely used in many industrial and commercial applications. Developed by the National Electrical Manufacturers Association (NEMA), the fuse helps protect electrical circuits against overcurrents generated by excess current flow or surges. FNA-1-1/4 fuses are generally available in single-pole and dual-pole configurations, also known as single- and double-throw applications.

Design and Construction

The FNA-1-1/4 is designed to provide safe electrical protection to circuits by constantly monitoring and regulating current with a fast response time. The fuse features a lightweight and compact design that is encapsulated in a ceramic tube to help keep the fuse components from being affected by environmental elements. Inside the tube, the FNA-1-1/4 is outfitted with two contact strips and a specialized lead-free fuse link. The fuse link is constructed out of a copper alloy with fiber- strand threads coated in a silicon-based, flame-retardant material. All of the components inside the tube are then capped with a plastic cover.

Working Principle

When current exceeds the overload level of the FNA-1-1/4, the copper alloy strands within the fuse link will heat up and begin to expand. When this happens, the contact strips are designed to open and the current is disconnected, preventing damage to the circuit. The special flame-retardant material helps extinguish any arcs that may have formed during the breakdown process. The FNA-1-1/4 is designed to allow inrush current while still providing the protection necessary in the event of an overload.

Application Field

The FNA-1-1/4 is ideally used in all applications that require a specialized fuse for overcurrent protection. Due to its compact and lightweight design, the fuse is used in a variety of industrial and commercial applications such as motor control centers, machinery, computers, and other electrical apparatus. It is also used in distribution and switchboard panels, HVAC equipment, air conditioning systems, and in electrical equipment subjected to high voltage transients.

Conclusion

The FNA-1-1/4 is an advanced specialty fuse designed to provide overcurrent protection for all kinds of electrical applications. Its fast response time and special flame-retardant material make it ideal for industrial and commercial applications. All of these features make the FNA-1-1/4 a perfect choice for any electrical system where overcurrent protection is needed.

The specific data is subject to PDF, and the above content is for reference