Smart Ideas: Options Revisited
Factors to Consider When Selecting the Best Resistor
To begin with, knowing what a resistor is important. So, a resistor is a device that regulates the flow of current. Most electrical appliances need a resistor for them to work. So it is important for one to know what resistor to choose.Here are some of the factors to consider when selecting the best resistor.
The Amount of Resistance to go through the Resistor
This one of the many most fundamental criteria factors for a resistor.In as much as resistance is one of the fundamental factors there is, other factors such as the range of temperature, circuit voltage requirements, noise and thermal considerations that will also influence the choice of the resistor. In choosing the best resistor, first, know the amount of output current needed to be produced. This assists to know whether to select a smaller or larger resistor depending with the device being used.
The Kind of Resistive Material
The metal film will be the best option to use with higher frequency. This is due to the less than one percent tolerance that the thin film possesses. Through the sputtering process film vapor is put onto a substrate surface to a precise thickness. Later on, the resistor is trimmed by laser further. With more accuracy and tighter tolerance, the metal film possess minimal noise and are more immune to radio frequency. So since they are more desirable you can get one of lower radio frequency.
The Temperature Limits
The temperature limit goes hand in hand with the quantity of energy produced. One thing that almost everyone doesn’t pay attention to is the fact that a resistor gets hot and the resistance changes. Adding on to the change in resistance, the quantity of energy produces from the resistor is definitely going to be different from the moment the resistor heats up. When the temperature is already maximum and the energy dispersed remains maximum then the end product will be a destroyed resistor. So when the operating environment is below the maximum then it will be okay.But when the ambient temperature will be raised then there will be a need to factor in the de-rating and choose the right temperature ratings and power resistor.
Voltage rating relates directly and intimately to the size of the case. Physically smaller gadgets contain low working voltage ratings due to their close contacts and could easily arc over. This is concluded that with a high system like off-line power supplies there it will be of importance to use bigger or more than one resistor in series. This is so as to get the voltage ratings to the whole circuit higher.
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