List of Model Selection and Online Purchase Address for Chip Resistors: Click on the image to enter
Chip resistor is a common passive component in electronic products, which has the characteristics of small size, high reliability, and high accuracy, and is widely used in electronic devices. When selecting chip resistors, power is an important consideration. This article will provide a detailed introduction to the principles for selecting the power of SMD resistors.
Firstly, we need to understand the meaning of chip resistor power. Chip resistor power refers to the maximum power that a resistor can withstand, usually in watts (W). When the current passing through the resistor and the resistance value of the resistor are determined, we can use the power formula P=I ² Calculate the power consumed by the resistor using R. Therefore, power selection should be based on the current on the resistor and the resistance value of the resistor.
Secondly, the current on the resistor is one of the key factors in selecting power. If the current on the resistor is large, the selected power should be large enough to ensure that the resistor will not be damaged due to excessive power. Usually, we recommend choosing a power equal to or slightly greater than the square of the current multiplied by the resistance value. For example, if the resistance value of the resistor is 100 ohms and the current is 1 ampere, then the selected power should be greater than or equal to 1 ²× 100=100 watts.
In addition, the resistance value of the chip resistor also affects the selection of power. If the resistance value is large, the selected power should be large enough to ensure that the resistance will not be damaged due to excessive power. On the contrary, if the resistance value is small, the selection of power can be correspondingly reduced. Usually, we recommend choosing a power equal to or slightly greater than the square of the current multiplied by the resistance value. For example, if the resistance value of the resistor is 100 ohms and the current is 1 ampere, then the selected power should be greater than or equal to 1 ²× 100=100 watts.
In addition, ambient temperature is also an important factor in power selection. Chip resistors generate heat during operation. If the ambient temperature is high, the heat dissipation capacity of the resistor will deteriorate, which may cause excessive temperature and affect the performance of the resistor. Therefore, in high-temperature environments, we recommend choosing higher power resistors to ensure their normal operation.
Finally, it should be noted that when selecting the power of SMD resistors, we should consider the reliability and lifespan of the resistors. Excessive power may shorten the lifespan of resistors, therefore, in order to ensure the reliability and lifespan of resistors, we should choose an appropriate power.
In summary, the selection of SMD resistor power should be based on comprehensive consideration of factors such as current, resistance value, environmental temperature, reliability, and lifespan on the resistor. By selecting the power reasonably, we can ensure that the SMD resistor can operate normally during the working process, while improving the reliability and stability of electronic products.
I hope this article is helpful for selecting the power of SMD resistors. If you have any questions or supplements, please feel free to contact us.
