What is the impact of the small breakdown voltage of the thermal pad?

The advancement of science and technology means that the complexity of things or equipment that people come into contact with has also increased, and the energy consumed has also increased. The raw materials or parts that need to be developed together are also improved due to their progress. Heating of electrical equipment is a common life phenomenon for people. The main reason is that part of the energy is lost when the current passes through the device and is converted from electrical energy to other energy, and a large part of this part of energy is dissipated in the form of heat.

If the heat cannot be dissipated in time and has been accumulated in the equipment, it may crash or even short-circuit due to the high temperature. There are certain safety risks. Therefore, the temperature of the equipment needs to be controlled. The common heat dissipation method is to install on the surface of the heat source. The radiator, to guide the temperature to the radiator in time, there is generally a certain tolerance gap between the heat source and the radiator, and a common treatment method is to add heat conduction treatment between them to eliminate the air between the tolerance gaps and fill the tolerance gap To reduce the thermal resistance within the tolerance and improve the thermal conductivity.

At present, the common thermal pads on the market are generally non-conductive and insulative. In order to meet the development of society and industrial needs, many of the voltages used by the equipment are far greater than the electrical appliances used in our daily life, so there is a problem That is, the equipment uses too much electrical voltage, and the breakdown voltage of the heat-conducting gasket of the equipment is low, which may cause the heat-conducting gasket to be broken down, which may cause potential safety hazards to the equipment. So why does this happen?

First of all, there is an economic term: dielectric strength. When a 1 mm thick insulating material is broken down, the voltage kilovolts that needs to be applied is called the dielectric strength of the insulating material, which is referred to as the dielectric strength. Many electrical equipment or related equipment and other manufacturing industries have a prescribed voltage. As long as the insulation strength of the insulator is not lower than the prescribed voltage of the equipment, accidents can be avoided.

Once the breakdown voltage of the thermal pad is lower than the specified operating voltage required by the device, it is likely that the electric charge in the insulator material is too strong due to the electric field force, which will easily lead to ionization collisions, resulting in breakdown of the insulator It happens, so the breakdown voltage of the thermally conductive gasket is generally relatively high. If you are facing a device with excessive voltage, it is recommended to use a thermally conductive silicone cloth here to ensure the reliability of the device.