Manufacturers name and part number for each semiconductor chip. b.Ĭapacitor values, tolerances, voltage ratings, and any special dielectric characteristics such as temperature coefficient.
#COMMON RESISTOR VALUES CODE#
Resistor color code is used to read parameters like resistance, voltage & tolerance whereas power rating in the circuit is used to avoid the circuit from damage.Resistor values, tolerances, actual maximum continuous power dissipations (no derating or nominal values) special requirements such as temperature coefficient of resistance (TCR), TCR tracking, ratio requirements, and stability. The selection of resistors can be done based on different parameters like color code and power rating. Generally, resistors are used in different applications but all types of resistors are not used in all the applications. Thus, this is all about an overview of the power rating of a resistor with example problems. Once the maximum rating of the resistor is increased then the resistor will be damaged. All resistors have a Maximum Dissipated Power Rating, which means the maximum amount of power it can safely dissipate without damage to itself.The main function of a resistor is to resist the flow of current throughout a circuit by dissipating useless power like heat. It is a significant factor to consider while selecting a resistor for a specific application.The resistor power rating is the specification that specifies the highest amount of power that the resistor can withstand.The use of power rating in resistors includes the following. When5 Watt Resistor is connected to a 9V source, and then it will be 7.5 x 24 x 38mm.When 3 Watt Resistor is connected to a 9V source, and then it will be 6 x 17 x 35mm.When a 2 Watt Resistor is connected to a 9V source, and then it will be 5.5 x 15 x 35mm.When1Watt Resistor is connected to a 9V source, and then it will be 5 x 11 x 28mm.When1/2 Watt Resistor is connected to a 9V source, and then it will be 3.2 x 8.5 x 28mm.When1/4 Watt Resistor is connected to a 9V source, and then it will be 2.5 x 6.5 x 28mm.When1/8 Watt Resistor is connected to a 9V source, and then it will be 1.8 x 3 x 28mm.The following resistor power rating chart will provide information regarding the rating of various resistors & their sizes. When the resistor size is high, then it handles with a high wattage value. The size of any type of resistor mainly depends on its power or wattage rating. So, the maximum safe current flowing through the resistor is 0.016A or 16mA. Substitute the power and resistance values in the above equation then we can get the flow of current through the resistor. We know the values of R = 1.8 KΩ and P = 0.5 WattsĪccording to the standard power equation P = I^2R. The formula for power rating within watts is P = V*I.Įxample-2: When the current flows throughout a 1.8KΩ resistor which is rated at 0.5 Watts then calculate the maximum safe current flowing through the resistor. We know the values of V = 10V and I = 40mA The resistor power rating example problems are given as Įxample-1: If a fixed resistor has 10V voltage across its terminals and the flow of current through it is 40mA then what is the maximum wattage or power rating of a resistor in watts? The electrical power units with values, symbols, and abbreviations are given in the following table.
Generally, this rating ranges from 1/8th watt to kilowatts.
When the wattage of the resistor enhances then the cost will be increased.
Usually, if the resistor size is larger, then the resistor can handle more power. The power rating can be rated in watts or W and it is the units of power.
0 kommentar(er)
