What Causes Fixed Resistors To Fail And How To Fix Them

What Causes Fixed Resistors to Fail and How to Fix Them

Fixed resistors are commonly used in most electronics devices. However, like all components, they can fail due to a variety of reasons. Knowing how fixed resistors usually fail and how to fix them is important for anyone who works with electronics.

What Is a Fixed Resistor?

A fixed resistor is an electrical component with a fixed resistance value. It is made of carbon, metal, or ceramic, and is usually in the form of a long cylindrical shape. Fixed resistors are used to regulate the amount of current that passes through a circuit.

Common Causes of Fixed Resistor Failure

There are several common causes of fixed resistor failure. The most common cause is excessive heat, which can cause the resistor to become brittle and break. This is why it is important to ensure that the resistor is not being overloaded with more current than it is rated for. In addition, poor soldering can cause a resistor to fail, as can mechanical stress, such as bending or twisting the resistor.

Signs of Resistor Failure

The most common signs that a resistor has failed are a change in its resistance value, or an open circuit. A change in the resistance value can be measured with a multimeter, while an open circuit can be identified with a continuity tester. In addition, a failed resistor may show signs of physical damage, such as broken leads or a charred appearance.

How to Repair a Failed Resistor

If a resistor has failed, it must be replaced with a new one with the same resistance value. When replacing a resistor, it is important to use the correct tools, such as a soldering iron that is rated for the type of resistor being replaced. The leads should be cleaned before soldering and the joint should be checked for a secure connection. It is also important to check that the resistor is not overloaded with too much current.

Conclusion

Knowing how do fixed resistors usually fail and how to fix them is important for anyone who works with electronics. Excessive heat, poor soldering, and mechanical stress can all cause a resistor to fail, and the signs of failure are usually a change in its resistance value or an open circuit. If a resistor has failed, it must be replaced with a new one with the same resistance value and using the correct tools and techniques.

Dated : 03-Feb-2023

Category : Education

Tags : Electronics