How is the power rating of a resistor chosen?
But in cases of circuits with high voltage and low resistance (high power), power ratings of resistors should be carefully chosen since more power is delivered in the circuit.
What’s the maximum power a resistor can dissipate?
When a resistor has a power rating of 2W, a maximum of 2W power can be fed to it for all combinations of voltage and currents as long as possible. Some resistors are designed for larger power dissipation. These are called Power Resistors. Resistors with power rating of at least 5W come under power resistors.
When do you need a higher power rating?
If you find yourself in a design situation where you need a certain resistance but need to exceed the power rating, you generally have three options: Buy higher-power-rated resistors. These are usually physically larger and more expensive. Divide into multiple resistors.
Can a resistor discharge more than 10 W per second?
This indicates that you may be able to briefly exceed the power rating as long as you don’t don’t exceed it on average. For example, if you have a resistor rated for 14 W, you can probably discharge through it at 10 Wfor just 1 msonce per second, with the resistor off for the rest of the second.
Why are resistors not suitable for all applications?
But all resistors are not suitable for all the applications. Resistors are selected using different parameters. Resistor color codes helps to read resistance, tolerance and voltage. Other than these three values, there is another important parameter required, for using the resistor in a circuit.
How many watts of power can a resistor handle?
Generally, larger the resistor more power it can handle. As the wattage of the resistor increases cost also increases. Resistors generally start from 1/8th watt to many kilo watts.Resistor wattage can be noticed by seeing the size of the resistor.