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Posted by on May 9, 2018

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Power resistor apparatuses are utilized for a wide range of power supply applications so that they can protect sensitive electronic devices. Resistors, therefore, need to be made of high-quality materials that will guarantee longevity and safety of your electric components. It is important to use parallel resistors to take care of high load currents, reduce thermal stresses and increase reliability. The parallel arrangement of the resistors might be different because of the variability in thermal issues and transistor manufacture. The resistors that are used in such kind of setups are known as balancing resistors. Click resistor to read more about Custom Resistors. These resistors can be of low value but high current.
A power resistor needs to be made of a thick film so that the resistor is both stable and it can also disintegrate the needed amount of heat. There are some important issues that you need to think about when selecting thick film resistor design, and these include power rating, resistor tolerance, resistance drift and temperature coefficient. The resistance drift and the power rating are often the most important when looking at the choice of materials to use. Normally, the selection of substrate materials is related to the thermal, electrical and mechanical needs of the application.
Careful selection of resistors is a good way to avoid distortion in the signal path especially in high-end equipment. Generally, resistor noise has various components with the relevant ones being for current noise and thermal noise. For any resistor, the noise level is same as long as the temperatures and the resistances are the same. The noise that comes from thin films is because of non-uniform depositions and surface imperfections. Because of that, the thicker the resistance film, the better it is because it will lower the resistance value and consequently lower the noise level.
Low noise is normally observed from those resistors that have been designed using bulk resistive elements. Some of these resistive elements include wire wound and foil. Visit high power resistors to learn more about Custom Resistors.  The wire is designed from metal alloys which are same to foil material. In the foil resistors, the resistive element and terminals are parts of the same foil, and therefore the issue is avoided. Usually, the resistor materials are applied in the form of paste and then later fired by heating it to a high temperature. Resistor pastes have ingredients such as a binder, temporary binder, organic solvents and metal alloys. The work of the temporary binders is to regulate the printing process. The glass particles melt up and then binds the active particles.

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