Sunday, August 17, 2025

Ceramic chip capacitors MLCC. What makes them better than others

In modern technology, instead of electrolytic capacitors with a capacity of up to several hundred microfarads and instead of tantalum capacitors, ceramic CHIP capacitors are used. Chip capacitors are mainly used for surface mounting. What is the difference between a chip capacitor and the others?
If you take a chip capacitor with a capacity of 10 μF and an electrolytic capacitor with the same capacity, then the dimensions immediately catch the eye, the chip is clearly smaller than the electrolyte. An electrolytic capacitor contains electrolyte and over time it dries out and the capacitor becomes unusable, a chip capacitor does not contain electrolyte and it is more durable. A tantalum capacitor is more expensive than a chip capacitor, in addition, tantalum can catch fire under unfavorable conditions, a chip capacitor will not burn. Electrolyte and tantalum have polarity, a chip does not have polarity
Chip capacitors have low equivalent series resistance and inductance (with NPO dielectric). This can be checked by taking the electrolyte and comparing it on an ESR tester, for a chip it will be about three times less.

There are several other types of chip capacitors, these are the x2y capacitor with four terminals and the LLA capacitor with 8 or more terminals. The X2Y capacitor is used to filter interference, and the LLA capacitor has low inductance and better frequency response and is used in high-frequency technology.

On the computer motherboard, chip capacitors act as a power filter.

Chips also have disadvantages. One of them is low mechanical strength, although there are manufacturers who produce capacitors with a reserve for stretching. They are also sensitive to thermal shock, so it is better to warm them up before soldering, but perhaps this disadvantage has been reduced today.

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Power regulator on the triac BTA16-600