3JS 4-R TR

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Fuses are the most widely used devices for circuit protection applications. In a circuit, a fuse serves as a sacrificial component that helps to protect other components from damage due to over-current or over-voltage conditions. A fuse is essentially a low resistance conductor which is designed to open or “blow” when too much current passes through it. When this happens, the fuse creates a break in the circuit, which prevents any further current from flowing.

3JS-4R-TR (three-junction-surface-mount-resistor-thermistor) is a unique type of surface mount fuse that combines the advantages of a thin film resistor and a thermistor for circuit protection. The 3JS-4R-TR is designed to provide high current protection, while allowing the circuit to maintain its performance and reliability. The fuse consists of three layers of resistive material: a base layer, an intermediate layer, and a top layer. The base layer is a thin film resistor that provides the low resistance path for currents up to 6 amps. The intermediate layer is a thermistor that provides higher current protection and prevents short circuits due to an excessive current. The top layer is a fuse cutout, which prevents any further current when the temperature reaches a predetermined value.

There are several advantages to using the 3JS-4R-TR fuse. Firstly, the fuse can be mounted flush to a PCB, which makes it more reliable than other fuse designs. Secondly, the temperature sensitive thermistor in the intermediate layer helps to protect other components from thermal damage due to excessive current. Finally, the low profile design of the 3JS-4R-TR allows for easy integration into almost any system.

The 3JS-4R-TR fuse is used in a wide variety of applications ranging from power supplies to commercial protection systems. In a commercial protection system, the 3JS-4R-TR is used to protect the circuit from over-currents and short circuits. In DC power supplies, the fuse can be used to protect against excessive currents that can damage other components. In all applications, the fuse helps to protect other components from damage due to high currents and provides reliable protection for a long period of time.

In conclusion, the 3JS-4R-TR surface mount fuse provides reliable protection from over-currents and short circuits. The fuse combines the advantages of a thin film resistor and a thermistor to ensure a high level of protection for other components. Its low profile design allows for easy integration into almost any system and makes it suitable for a wide range of applications.

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