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Does the physical size of a resistor matter?
Generally speaking the larger their physical size the higher its wattage rating. However, it is always better to select a particular size resistor that is capable of dissipating two or more times the calculated power.
What does the physical size of a resistor represent?
They are made in ohmic values that range from one ohm to millions of ohms. The physical size of the resistor is related to its wattage rating, which is the ability of resistor to dissipate heat caused by the resistance. ratio of these which determines the resistor’s value.
Does resistor package size matter?
Size is not that important (when the replacement part is bigger) but it’s a 5-band resistor so make sure that you have a resistor of equivalent tolerance (probably +/-1%) or better and temperature coefficient.
What is resistor and how it works?
A resistor is a passive two-terminal electrical component that implements electrical resistance as a circuit element. In electronic circuits, resistors are used to reduce current flow, adjust signal levels, to divide voltages, bias active elements, and terminate transmission lines, among other uses.
Can I use a smaller resistor?
Replacing a 1/2 watt resistor with a 1 watt resistor will not cause a problem provided there is physical room for the larger component. Going the other way may not work out well depending on the actual power dissipation in the device.
Why are resistors different sizes?
Resistors come in different sizes depending on how much power they can safely dissipate. Larger packages dissipate higher wattage. No matter what the size, the color code is the same. For non-cylindrical and some large cylindrical resistors, the resistance is indicated with letters and numbers printed on the package.
Most resistors found in small electronic devices such as portable radios are rated at 1/4 (0.25) watt or less. The power rating of any resistor is roughly proportional to its physical size. Note in the first resistor photograph how the power ratings relate with size: the bigger the resistor,…
How to tell the size of a surface mount resistor?
The shape and size of surface mount resistors are standardized, most manufacturers use the JEDEC standards. The size of SMD resistors is indicated by a numerical code, such as 0603. This code contains the width and height of the package. So in the example of 0603 Imperial code, this indicates a length of 0.060″ and a width of 0.030″.
What are the factors that affect the resistance of a conductor?
There are four factors which influence the amount of resistance of a conductor: type of material, length, thickness and temperature. Different materials will offer different amounts of resistance. Longer length resistors will offer more resistance than shorter resistors. Thicker resistors offer less resistance than thinner resistors.
What are the four factors that affect resistance?
There are 4 different factors which affect resistance: 1 The type of material of which the resistor is made. 2 The length of the resistor. 3 The thickness of the resistor. 4 The temperature of the conductor.