任何電子產(chǎn)品中的電路設(shè)計(jì)中都需要由電路保護(hù)器件來防止過電流對電子產(chǎn)品本身的損害，本質(zhì)的作用就是保護(hù)電路。電解電容廠家就給大家詳細(xì)介紹下不同類型的電子元器件在電路保護(hù)中起到什么樣的作用。

　　In the circuit design of any electronic product, the circuit protection device is needed to prevent the damage of over-current to the electronic product itself. The essential function is to protect the circuit. Electrolytic capacitor manufacturers will give you a detailed introduction of different types of electronic components in circuit protection what kind of role.

　　薄膜電容：

　　Film capacitance:

　　薄膜電容的作用很多，可以抑制電源，電池干擾用電路。

　　Thin film capacitor has many functions, which can restrain the interference of power supply and battery.

　　壓敏電阻：

　　Varistor:

　　防止電壓不穩(wěn)定，對其它電器元件造成傷害。壓敏電阻主要用于在電路承受過壓時(shí)進(jìn)行電壓鉗位，吸收多余的電流以保護(hù)靈敏器件。

　　Prevent voltage instability and damage to other electrical components. Varistor is mainly used for voltage clamping when the circuit is under over-voltage to absorb excess current to protect sensitive devices.

　　安規(guī)電容：

　　Safety Capacitance:

　　為盡量減少阻抗，旁路電容要盡量靠近負(fù)載器件的供電電源管腳和地管腳。這能夠很好地防止輸入值過大而導(dǎo)致的地電位抬高和噪聲。地彈是地連接處在通過大電流毛刺時(shí)的電壓降。

　　In order to reduce the impedance as much as possible, the bypass capacitance should be close to the power supply pin and ground pin of the load device. This can prevent ground potential elevation and noise caused by too large input value. The earth bomb is the voltage drop when the ground connection passes through a large current burr.

　　熱敏電阻：

　　Thermistor:

　　當(dāng)過激電流通過熱敏電阻時(shí)，有些特殊材料制作的熱敏電阻會(huì)產(chǎn)生電阻值急劇升高的現(xiàn)象，這種非線性特性類似于開關(guān)，將這種熱敏電阻用在特殊的電路保護(hù)回路中能夠起到過激保護(hù)作用。

　　When the over-excited current passes through the thermistor, the resistance value of some special materials will rise sharply. This nonlinear characteristic is similar to the switch. This kind of thermistor can play an over excitation protection role in the special circuit protection circuit.

　　很多時(shí)候在電路設(shè)計(jì)中只選擇一個(gè)電子元器件來保護(hù)電路是行不通的，需要根據(jù)電路需求選擇適合的各種類型的電子元器件，像薄膜電容、壓敏電阻、安規(guī)電容等都是常用的產(chǎn)品。當(dāng)然在采購電子元器件的時(shí)候要根據(jù)實(shí)際需求進(jìn)行選擇，若有任何疑問可隨時(shí)與我們聯(lián)系。

　　Most of the time, it is not feasible to select only one electronic component to protect the circuit in the circuit design. It is necessary to select various types of electronic components according to the circuit requirements, such as film capacitor, varistor, safety capacitor, etc. Of course, when purchasing electronic components, you should choose according to the actual needs. If you have any questions, please contact us at any time.