RWR78S4991FRB12

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Through hole resistors refer to those fixed resistors which have both two ends extended out forming a lead for soldering and assembling. This type of electrical components mainly serve for electrical connection purpose, which means that it can connect with a device or the device to another. It is available in variety of types. Generally, three types are usually used: the ceramic capacitors, film capacitors and the electrolytic capacitors.

RWR78S4991FRB12 is one of the commonly used through hole resistors. This kind of components contains three layers: the inner, the middle and the outer layer. The inner layer is made of a pure material, and it is also the heating part when the resistor is working. The middle layer is a medium between the inner and outer layer, while the outer layer insulates the resistor from outside environment.

The application field of RWR78S4991FRB12 includes power supplies, control units, radiation systems and data collection modules, etc. It is a high-power through hole resistor, patented for its high reliability. Typical applications include, use it as a power resistor in power supplies; for controlling electric current in control units; and for high-power radiation systems and data collection modules.

The working principle of RWR78S4991FRB12 can be best explained with the example of a lamp. To make a lamp work, electrical current needs to flow through the inner layer to generate heat. The heat produced by the resistor will be transferred to the outer layer. As the temperature increases, the resistor’s resistance to the electrical current also increases. This allows the electrical current to be regulated, thus making the lamp work properly.

In conclusion, RWR78S4991FRB12 is one kind of through hole resistors. It features with high-power and resistant to high temperature environments. Its applications cover from power supplies, control units to radiation systems and data collection modules. Most importantly, its working principle is quite simple: the resistor will generate heat in order to regulate the electrical current, resulting in the normal operation of a device or system.

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