What is a Power Resistor?

In learning Electronics and Circuits especially as a beginner, you might have already asked yourself the question about "what is a Power Resistor". 

These devices are components that are usually found in your electronic gadgets, appliances, machines and other items powered by electricity either from a battery or directly from your electrical outlets.

Here are some of the primacy functions of this electronic component;

1. Voltage Reduction

Due to the component’s resistant characteristics, it can reduce voltages in some part of the circuit.

2. Current Reduction

Just like voltage, current can also be reduced.

3. Protection

With the capability of the component to reduce both voltage and current, it protects other electronic parts by providing them just the exact amount of ratings they need to function.

4. Noise Reduction

In all circuit, it is always expected to have electrical noises but through the application of resistors they can be reduced.

There are various types of resistors manufactured in different materials, sizes and characteristics. Some of these electronic components are even just made up simple wires. 

The most common type of resistors used by most hobbyists on their projects is the carbon type. 

It consists of resistive materials contained on the main body of the component and attached to two lead wires as the terminals.

It is important for you to know how to read the value of the resistor that you intend to use on your project. 

Due to their various types, some manufacturers had embedded the value on the component itself for easier identification. 

Otherwise, you may need to use a VOM (Volt-Ohm-Meter) measuring tool to determine the values. For Carbon Resistors, their values can be easily interpreted through color coding.

What will happen when you use the wrong value of a Power Resistor on your circuit?

Using an incorrect resistor could only lead into one result. Of course your circuit or project will not work. The worse thing happens when you use a resistor value that is far less from what is required. 

If it happens that you have mistakenly placed such component on your project, the result will be an overheat affecting all other electronic components on the circuit causing more damages. 

Now, fixing or troubleshooting your project will further put you to the task of replacing damaged parts and you this includes your expenses on buying those replacements.

Another commonly used type of resistors is the Adjustable type. Hobbyists use them on their projects to avoid chances of overheating and under powering the circuit. 

A Potentiometer is an example of an adjustable resistor. It composes of three terminals and a rotating knob for adjusting its resistance output.

If you have any further questions about what is a power resistor then you are free to post them on the comments provided at the end of this post.