How to judge whether a capacitor is polar capacitor? |Focus on mid-to-high-end brand capacitor manufacturers

A simple and effective way to judge whether a capacitor is polar or capacitive is to use an instrument to test. We prepare a 12V DC power supply and an ammeter. First connect the ammeter to the power supply, then connect the capacitor to the power supply, look at the current, then discharge the capacitor, and then connect it to the power supply in the reverse direction, and then look at the current. If the current is the same, it is non-polar. If the current is large and the other is small, it is polarized. When the current is small, the terminal connected to the positive terminal of the power supply is the positive terminal of the capacitor! Common polar capacitors are mainly electrolytic capacitors and monolithic electrolytic capacitors. It uses sulfuric acid as an insulating medium, which can make a larger capacity into a smaller volume, and is marked with a + sign and some with a-sign. , Generally used for low-frequency cross-linking and bypass filtering, the disadvantage is that the meson loss is larger.

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