People often don't know the difference between chip capacitors and another kind of chip electrolytic capacitors.

1. The full name of SMD capacitor is multilayer chip ceramic capacitor, which is the general name for most capacitors that can be packaged by SMD, while electrolytic capacitor is a type of capacitor classification.

2. SMD capacitors are divided into two types: non-polar capacitors and polar capacitors. Polar capacitors are generally called electrolytic capacitors. However, some electrolytic capacitors are not suitable for SMD packaging, such as aluminum electrolytic capacitors for energy-saving lamps.

3. SMD capacitors are generally small in size, small in capacity, and relatively high in accuracy, while electrolytic capacitors are relatively large in volume and capacity and have many types.

Generally, the volume of the chip capacitor is smaller than that of the plug-in, and it is more suitable for the development of the times. The purpose of chip capacitors: chip capacitors have considerable effects in medium and high frequencies. They are small in size, high withstand voltage, and have very low ESR at high frequency resonance points (several mΩ). They are usually used in medium and high frequencies (100k-hundreds). M) Filtering. It is best to use each resonant frequency band, such as 102, 103, 104 (ie 1nF, 10nF, 100nF) ceramic capacitors in parallel.

1. The capacitance per unit volume is very large, tens to hundreds of times larger than other types of capacitors.

2. The rated capacity can be very large, hundreds of UF or even tens of thousands of UF can be easily achieved.

3. The price has an overwhelming advantage over other types, because the constituent materials of electrolytic capacitors are common industrial materials, such as aluminum.

The disadvantages of chip electrolytic capacitors are dielectric loss, large capacity error (the maximum allowable deviation is +100%, -20%), poor high temperature resistance, and prone to failure due to long storage time. The use of chip electrolytic capacitors, because the capacity of electrolytic capacitors can be hundreds of thousands of UF or even tens of thousands of UF, in the low-IF filter circuit, the first thing to consider is electrolytic capacitor/chip electrolytic capacitor. It should be noted that most electrolytic capacitors have polarity, that is, the positive and negative poles must not be reversed, even if the polarity is accidentally reversed when measuring with an ordinary multimeter.