0001.2709.11

Response Time:	Slow
Size / Dimension:	0.205" Dia x 0.787" L (5.20mm x 20.00mm)
Color:	--
Operating Temperature:	-55°C ~ 125°C
Approvals:	CCC, cURus, VDE
Melting I²t:	33.7
Breaking Capacity @ Rated Voltage:	1.5kA
Mounting Type:	Holder
Package / Case:	5mm x 20mm
Series:	SMD-SPT
Voltage Rating - DC:	300V
Voltage Rating - AC:	250V
Current Rating:	3.15A
Fuse Type:	Cartridge, Ceramic
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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Introduction

Fuses are an integral part of electricity safety that protect both the electrical wiring system and electrical devices from damage due to overloads and short circuits. They provide protection by quickly interrupting the flow of electricity whenever an abnormal current is detected. Fuses have been the reliable protection workhorses of electrical systems for decades, and their application field and working principle need to be further investigated.

Application Field

Fuses come in a variety of shapes, sizes, and types. High voltage fuses, such as those found on the main entry electrical panel, are installed in heavy-duty metal electrical enclosures. Low voltage fuses, also known as circuit breakers, are typically found in a fuse box mounted on a wall. They are commonly used in everyday applications, such as lighting, air conditioning, dishwashers, and other types of small electrical appliances.Fuse technology has also been adopted for use in high-tech industries, such as semiconductor production. Semiconductor manufacturers use high-speed, high-precision fuses to protect complex micro circuits from damage caused by over-currents or other short circuits.In addition, fuse technology has been applied in automotive applications, where the high-speed operation of modern electronic components requires the use of miniature, high-precision fuses. Automotive electron components are typically protected by fuses that act as both over-current and high-voltage protection devices.

Working Principle

The working principle of fuses is based on the electrical circuit protection provided by an interruptible element – the fuse. When an overload or short circuit condition occurs, the flow of electricity is interrupted by the fuse before the entire circuit is damaged.The interruptible element in a fuse is a fine wire or metal strip that has a very low melting point. This element is connected between two electrical terminals and melts when an over-current situation occurs, interrupting the current flow. When the current flow is interrupted the circuit remains open and the danger of electrical damage is averted.The melting of the fuse is caused by the heat generated when the electrical current runs through it. This heat is generated because the resistance of the fuse material is much lower than that of the metal contacts it connects to in the electrical circuit. When the current that exceeds the fuse\'s amperage rating travels through the fuse, resistance results in the buildup of heat. This heat melts the fuse wire, interrupting the current flow and preventing further damage.

Conclusion

Fuses are an essential component of electrical safety, and their application field and working principle provide important information about the extent of their protection. Fuses have been used in a variety of applications, from consumer electronics to high-tech semiconductor production. And their working principle is based on the protection provided by their interruptible element – the fuse wire – that has a very low melting point and melts when an over-current situation occurs, interrupting the current flow and thus averting the danger of electrical damage.

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Part Number	Manufacturer	Price	Quantity	Description