How does the car fuse seat prolong its life? Does it have a protective effect when the temperature is too high? Today, the car safety seat manufacturers will analyze them one by one.

Life and protective effect of automobile fuse holder

In the process of making automobile fuse seat, there are mainly several products with limited fuse time, and the obligation temperature of theoretical requirements must be considered in the selection of a power supply module, because of the difference of its temperature and different grades of materials. its cost will be greatly different, improper application will affect, so it must be carefully considered.

Automobile fuse seat output ripple and noise power is small, static care is good, but the department's magnetic material pleading is also higher, so the fuse product frequency is lower than 300kHz, even some only about 100kHz, so it is difficult to meet the load static variables under the premise of demanding application, so should consider the application of high-frequency switching products.

The automobile fuse holder in the manufacture is that it prolongs the life of the fuse, and its improved system reliability is to choose a protection function product, that is, the external circuit defect module of the fuse, the power supply can be protected automatically, and the shape does not fail. After the external defects are worn out, it should be able to return to normal automatically.

The fuse protection of automobile fuse holder should at least include input overvoltage, undervoltage, soft start protection, output overvoltage, overcurrent and short circuit protection when in use, and its products should also have overtemperature protection when in use. the main notice of the expected effective time failure of the fuse is the risk of external defects.

Generally speaking, the fuse current (marked current) refers to the rated current of the fuse, that is to say, the fuse can work continuously for more than 4 hours without fusing. The marked current of the fuse base is also the rated current of the fuse base in the main hall service environment, that is, the fuse can be installed no more than the fuse base marked current.

Heating rate of fuse holder

In the course of using the current fuse holder, when the current flows through the conductor, the conductor will be heated because there is a certain resistance between the conductors, and the calorific value of the current fuse holder will follow the Q=024I2RT formula to a certain extent, where T is the time the current flows through the conductor, R is the resistance of the conductor, 024 is a constant and Q is calorific value and so on.

In the process of electrification, the fuse of the current fuse will cause the temperature of the melt to rise because of the heat converted by the current. In the process of loading the normal working current or the allowable overload current, the heat generated by the current and the heat emitted through the melt, the shell and the surrounding environment can be balanced by themselves.

When the heat dissipation speed of the current fuse holder can not keep up with the heating speed, these heat will gradually accumulate on the melt, causing the melt temperature to rise, and when the daily temperature reaches or exceeds the melting point of the melt material, it will make it liquefied or vaporized, thus disconnecting the current and protecting the circuit and the person.

The electrical performance of the current fuse holder, when in use, its fuse is connected in series in the electronic circuit, generally speaking, its cathode is required to be small, when the route works normally, it is only equivalent to a wire and can conduct the circuit stably for a long time. When current fluctuations occur due to power supply or external interference, it should also be able to withstand a certain range of overload. In the current fuse holder, when there is a relatively large overload current in the circuit, the fuse will act to protect the safety of the circuit by disconnecting the current.

The above is the introduction of "over-temperature protection of automobile fuse seat". We need to know more about the car safety seat. Please contact our manufacturer for more information.