FNM-9 Circuit Protection

Applications:	Motor Protection, Transformer Protection
Size / Dimension:	0.406" Dia x 1.500" L (10.30mm x 38.10mm)
Package / Case:	5AG, 10mm x 38.1mm
Mounting Type:	Holder
Breaking Capacity @ Rated Voltage:	200A
Operating Temperature:	--
Approvals:	CE, CSA, UL
Class:	--
Features:	--
Series:	FNM
Response Time:	Slow
Voltage Rating - AC:	250V
Current Rating:	9A
Fuse Type:	Cartridge
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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Introduction

The FNM-9 is a type of electrical specialty fuse that features an internal melting alloy element. This fuse is primarily used as a current-limiting device for direct current (DC) applications and can be used to ensure the safety of equipment and personnel against risk of injury due to high current and short circuit conditions. The FNM-9 is available in two sizes, 6.35 mm x 10.2 mm and 7.14 mm x 15.5 mm, and can handle a maximum current of 10 A and 25 A respectively.

Application Field

The FNM-9 is used to rapidly disconnect an electrical circuit when an overload or short circuit occurs. This can be done by using the internal alloy element that is designed to melt at a certain temperature in order to deactivate the circuit. The FNM-9 is widely used in various electronic and electrical applications such as power supplies, PCBs, automotive, computers and components, medical equipment, and UPS. The FNM-9 is also used in low voltage applications that require an accurate current limiting.

Working Principle

The FNM-9 works by swiftly interrupting a circuit when it detects an overload or short circuit condition. This is done by using the internal alloy element that melts away when the temperature rises above a predetermined threshold. This allows the circuit to break and prevents any damage to the equipment or personnel from the high current.The FNM-9 fuse is a resistive element, meaning that when a circuit is supplying a certain current, the fuse will resist the flow of current up to its rated current. When the current exceeds the rated current, the fuse quickly heats up and the temperature rises until the heat causes the internal alloy element to melt away, which in turn causes the fuse to deactivate the circuit.

Conclusion

The FNM-9 fuse is an electrical specialty fuse that is designed to disconnect an electrical circuit when an overload or short circuit condition is detected. This fuse features an internal melting alloy element that will quickly melt at a certain temperature to deactivate the circuit. The FNM-9 is available in two sizes and can handle a maximum current of 10 A and 25 A respectively. The FNM-9 is widely used in various electronic and electrical applications and in low voltage applications that require accurate current limiting.

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