3JS 300-R

Package / Case:	2AG, 5mm x 15mm (Axial)
DC Cold Resistance:	1.5 Ohms
Size / Dimension:	0.217" Dia x 0.591" L (5.50mm x 15.00mm)
Color:	--
Operating Temperature:	-55°C ~ 125°C
Approvals:	CE, CSA, cURus
Melting I²t:	0.64
Breaking Capacity @ Rated Voltage:	100A AC, 150A DC
Mounting Type:	Through Hole
Series:	3JS
Response Time:	Slow
Voltage Rating - DC:	140V
Voltage Rating - AC:	350V
Current Rating:	300mA
Fuse Type:	Cartridge, Glass
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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Introduction

Fuses are devices used to prevent an appliance or piece of equipment from being damaged due to an overload or short circuit. They are an important part of any electrical system, as they can protect other components and keep them from being damaged due to a power surge. The 3JS 300-R is a type of fuse that is designed to be used in a variety of applications and settings, and it is important to understand its capabilities and its working principle.

Application Field

The 3JS 300-R fuse is most commonly used in applications such as industrial control systems, medical systems, lighting systems, and communication systems. It is a versatile device that is capable of handling a variety of different power levels. In industrial control systems, the 3JS 300-R is often used for power channeling and power distribution, providing protection for sensitive components. In medical systems, the 3JS 300-R is used to ensure that sensitive equipment is not damaged due to power surges. In lighting systems, it can be used to limit the amount of power that is available, as well as to provide protection for expensive lighting equipment. Finally, in communication systems, the 3JS 300-R can be used to help regulate the power that is being used, ensuring that communications are not disrupted due to power failure.

Working Principle

The 3JS 300-R is a self–acting fuse that is designed for use in several different types of electrical applications. The fuse is composed of a metal strip that is encased in a ceramic case, and it has two contact points on the end which connect to the circuit. The fuse is designed to blow when the current passing through it exceeds the ratings of the fuse. When the current exceeds the predetermined level, it causes the metal strip inside to heat up and expand, breaking the fuse and stopping the flow of electricity.The 3JS 300-R fuse has several different types of ratings, which are based on the amount of current that it is able to handle. The most common ratings used in industrial applications are 20A, 30A, 40A, 50A, 60A, 70A, and 100A. As a general rule, the higher the rating, the more current the fuse can handle before it blows. It is important to select the correct rating based on the application in order to ensure the maximum level of protection.

Conclusion

The 3JS 300-R is a versatile fuse that is designed for use in a wide range of electrical applications. With its wide range of ratings, it is capable of handle a variety of different power levels, allowing it to provide a high level of protection for sensitive components. Understanding the capabilities and working principle of the 3JS 300-R is important in order to select the correct rating for the given application and ensure that it is able to provide the desired level of protection.

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