任何电子产品中的电路设计中都需要由电路保护器件来防止过电流对电子产品本身的损害，本质的作用就是保护电路。电解电容厂家就给大家详细介绍下不同类型的电子元器件在电路保护中起到什么样的作用。

　　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.

　　薄膜电容：

　　Film capacitance:

　　薄膜电容的作用很多，可以抑制电源，电池干扰用电路。

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

　　压敏电阻：

　　Varistor:

　　防止电压不稳定，对其它电器元件造成伤害。压敏电阻主要用于在电路承受过压时进行电压钳位，吸收多余的电流以保护灵敏器件。

　　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.

　　安规电容：

　　Safety Capacitance:

　　为尽量减少阻抗，旁路电容要尽量靠近负载器件的供电电源管脚和地管脚。这能够很好地防止输入值过大而导致的地电位抬高和噪声。地弹是地连接处在通过大电流毛刺时的电压降。

　　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.

　　热敏电阻：

　　Thermistor:

　　当过激电流通过热敏电阻时，有些特殊材料制作的热敏电阻会产生电阻值急剧升高的现象，这种非线性特性类似于开关，将这种热敏电阻用在特殊的电路保护回路中能够起到过激保护作用。

　　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.

　　很多时候在电路设计中只选择一个电子元器件来保护电路是行不通的，需要根据电路需求选择适合的各种类型的电子元器件，像薄膜电容、压敏电阻、安规电容等都是常用的产品。当然在采购电子元器件的时候要根据实际需求进行选择，若有任何疑问可随时与我们联系。

　　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.