PCB Tech - What to do if burning circuit boards

Burning circuit boards is a worrying phenomenon. In the electronics industry, the burning circuit boards can have serious consequences consequences.As as an important part of electronic devices, the performance and reliability of printed circuit boards (PCBs) are very important.One of the key factors is the heat resistance of printed circuit boards, which is usually measured by the glass transition temperature (TG value).

The TG value, i.e. the glass transition temperature, refers to the temperature at which the polymer material passes from a glass state to a high elastic state.In printed circuit boards, the main materials are usually resin, glass fiber vb.TG its value reflects changes in the physical condition of these materials at different temperatures, which determines the Operating Temperature December of the Pcb and affects the reliability and life of the Pcb.

The burning circuit boards can have various causes, Here are some of the main factors：

1. Power Failure：When a short circuit occurs in the circuit, the current rises sharply and produces too much chaleur.Si the heat cannot be dissipated in time, the PCB May Burn.If the load in the circuit exceeds its rated capacity, this will also cause overcurrent and generate too much heat, which will cause the circuit board to burn out.

2. environmental factors：Desert areas, Boiler houses, etc.in some high temperature environments, such as, circuit boards may be affected by high external temperatures, which may cause their temperature to rise and exceed TG values, which may cause Burns.

3. design errors：If the PCB design is not suitable, and the heat dissipation performance is poor, heat will accumulate on the PCB, increase the temperature, and eventually cause combustion.If the TG value of the selected PCB material is too low or does not have good heat resistance, combustion can easily occur in a high temperature environment.

Burning circuit boards

In order to avoid burning circuit boards, we can take the following measures:

1. reasonable PCB design

When designing printed circuit boards, the heat dissipation problem should be fully considered, and the heat sink, fan, etc.reasonable heat dissipation methods such as should be taken into account, so that the heat can dissipate over time, and the PCB temperature should be lowered.Choose PCB materials with appropriate TG and heat values according to the working environment and electronic equipment requirements resistance.At at the same time, factors such as the insulating properties of the material and its flame retardant properties should also be taken into account.

2. strengthening electrical safety management

When using electronic equipment, the circuit connection should be checked regularly to make sure that there is no short circuit, or overload.At at the same time, fuses, circuit breakers, etc.such overload protection devices should also be installed to prevent excessive current from causing a fire.Good grounding and insulation can effectively prevent power outages and electric shock.When designing and installing the printed circuit board, it should be made sure that the grounding is reliable and the insulation is good.

3. check environmental factors

When using and storing electronic devices, they should be avoided as much as possible in a high temperature and humidity environment.If it is to be used in these environments, air conditioner, dehumidifier, etc. appropriate protective measures such as should be taken.Dust and static electricity can damage the circuit board and increase the risk of short circuits.Therefore, electronic devices should be cleaned and maintained regularly, as well as dust and antistatic work should be carried out.

Unfortunately, if burning circuit boards occurs, we must immediately take the following emergency measures：

1. turn off the power

First of all, the Power Supply of electronic devices should be cut off immediately to prevent the spread of fires and the occurrence of electric shock accidents.

2. Use a fire extinguisher to extinguish the fire

If the fire is small, you can extinguish the fire with a fire extinguisher.When choosing a fire extinguisher, depending on the type of fire, suitable fire extinguishers, for example, Dry Powder extinguishers, carbon dioxide extinguishers, etc. it should be chosen.

3. People Who Have Been Evacuated

If the fire is large, the surrounding personnel should be evacuated immediately. personnel.At at the same time, you need to trigger the fire alarm in time and ask for Help from the Fire Department.

4. protect important data

If important data is stored on the circuit board, this data should be protected as much as possible when extinguishing a fire.You can remove the storage device or use a data backup software for backup.

Burning circuit boards is a problem that we need to pay close attention to. This can cause serious damage to electronic devices, the environment and the safety of personnel.Through reasonable design, strict management and timely Emergency measures, we can effectively prevent and respond to this situation, offer a more secure and reliable guarantee for the development of the electronics industry and people's lives.