Why can't electrolytic capacitors be reversed?
Visit：4371 Date：2023-12-16
1. Polar electrolytic capacitor: The positive electrode is a metal substrate to which an oxide film is adhered, and the negative electrode is connected to the electrolyte through a metal plate. Polar electrolytic capacitors usually function as power supply filtering, decoupling, signal coupling and time constant setting, and DC blocking in the power supply circuit or intermediate frequency and low frequency circuits.
2. The non-polar (bipolar) electrolytic capacitor adopts a double oxide film structure, which is formed by connecting two negative electrodes in two polar electrolytic capacitors. The two electrodes are respectively two metal plates (all of which are oxidized). The membrane is connected, and the electrolyte between the two sets of oxide membranes.
Non-polar electrolytic capacitors are commonly used in acoustic crossover circuits, television S correction circuits, and start-up circuits for single-phase engines.
3. Electrolytic capacitors with polarity, the leakage current is small after the forward voltage connection, and the reverse voltage leakage is large. Therefore, do not reverse the connection, reverse connection will damage the electrolytic capacitor, or even burst. Non-polar electrolytic capacitors can be connected without any positive or negative electrode.
