Can burned out thermistors be replaced with regular resistors?

Burned-out thermistor can not be replaced with a general resistor, the resistance value of the thermistor is not fixed, it changes with the change of temperature, the resistance value of the ordinary resistance is stable and unchanged, the two are used in different places, the role is different, it must be replaced with the same model, or the characteristics of the thermistor, I wish you success.

Summary. There are several reasons why thermistors burn out:

The instantaneous current of the thermistor is too large and breaks down the resistance coil;

The insulation protection of the resistance wire of the thermistor is worn out, resulting in a short circuit between the coils;

The line voltage is unstable and fluctuates greatly, and the instantaneous voltage exceeds the guarantee index of the thermistor.

Hello, I have seen your question and am sorting out the answer, please wait for a while There are generally several reasons why the thermistor burns out: The instantaneous current of the thermistor is too large, breaking down the resistance coil; The insulation protection of the resistance wire of the thermistor is worn out, resulting in a short circuit between the coils; The line voltage is unstable and fluctuates greatly, and the instantaneous voltage exceeds the guarantee index of the thermistor.

Summary. Please wait patiently for two minutes, we are sorting it out, and we will answer you immediately, and please do not end the consultation.

Please wait patiently for two minutes, we are sorting it out, and we will answer you immediately, and please do not end the consultation.

Converts heat energy into electrical energy.

A thermistor is a sensitive device that changes significantly with temperature, and it can convert heat (temperature) directly into electricity. In the temperature range of Gongchang data, the thermistor whose resistance increases rapidly with the temperature is called a positive temperature coefficient thermistor; Otherwise, it is called a negative temperature coefficient thermistor.

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Some people say that electricity is converted into heat energy, thinking that the voltage is first applied and then the heat is induced.

Theoretically, heat is converted into electricity.

Ordinary resistance cannot be replaced by thermistors, and changes in thermistor resistance cannot be replaced.

Of course not, the resistance value of the ordinary resistor is almost constant, and it does not change with the temperature, and the resistance value of the thermistor changes as soon as the temperature changes, which will cause the circuit to work abnormally.

According to the problem you described, the result of the teacher's inquiry is: about whether the resistance value will become smaller after the thermistor is damaged, the answer is yes, and the resistance value usually becomes smaller after the thermistor is damaged, which is caused by the microscopic change of the resistive material buried in the heating process. When a thermistor is subjected to overheating or prolonged high temperatures, the structure of the resistive material may be damaged, such as the lattice is twisted, fractured, or the grain boundaries are loose, and the electron migration and charge carrying capacity of the resistive material are reduced, which in turn leads to changes in the resistance value.

Generally speaking, the resistance of the thermistor is affected by factors such as ambient temperature and service life, and attention should be paid to avoid excessive heating and long-term high temperature to ensure its normal service life and working stability

Summary. If a thermistor is damaged by exceeding its maximum allowable power or voltage, then its resistance value may become smaller. This is because in this case, the material inside the thermistor is heated, resulting in an increase in the conductive particles in the resistor material, resulting in a decrease in the resistance value.

However, if the thermistor is mechanically damaged, aging, etc., its resistance value may become larger or the same if it is due to other reasons.

If a thermistor is damaged by exceeding its maximum allowable power or voltage, then its resistance value may become smaller. This is because in this case, the material inside the thermistor is heated, resulting in an increase in the conductive particles in the resistor material, resulting in a decrease in the resistance value. However, if the thermistor is damaged due to other reasons, such as mechanical damage, aging, etc., then its resistance value may become larger or the same as the non-changer.

Dear, the resistance value will become smaller after the thermistor is damaged, there are many situations, I have analyzed it for you here, you take a look at the above.

If it is not a precision circuit, when the resistor is broken, it can be replaced by a similar resistance value (not much smaller or larger than the original) and a heat dissipation power greater than or equal to the original value.

If a resistor burns, it can be as follows:

1. After the wire winding resistance is burned, sometimes there are no scorch marks (only the resistance wire is broken).

2. If the current is too large and the resistor is burned out, there will be traces of scorching on the outer skin, and the resistor is broken (not energized).

3. Some resistors pass through the current is not too large but exceed their rated current, and the epidermis will also be scorched after a long time of power-on, but the resistance itself is not bad (it is still indicated as normal).

If you want to determine whether the resistance is burned out (when you can't see it from the outside), you can use the resistance level of the multimeter resistance file to judge.