Selection of Capacitors (1)

Selection of capacitors (1)
1. Use common sense
When choosing a capacitor, the actual voltage in the circuit does not exceed its withstand voltage. When using electrolytic capacitors, it should also be noted that the positive and negative electromagnetics are not reversed. Different circuits should use different capacitors. The wiping circuit can choose mica, high frequency ceramic capacitor, DC isolation can choose paper medium, polyester, mica, electrolytic, ceramic and other capacitors, filter can choose electrolytic capacitor, bypass can choose polyester, paper medium, ceramic, electrolytic and other capacitors.
Before installing the capacitor into the circuit, check whether there is a short circuit, open circuit, leakage, etc., and check its capacitance value. When installed, the type of capacitance, capacitance, voltage and other symbols should be easily visible for verification.
2. Main performance indicators
Rated working voltage: within the specified range, the capacitor runs stably for a long time. The maximum DC voltage it can carry is the withstand voltage of the capacitor, also known as the DC working voltage of the capacitor. If it is in an AC circuit, it is especially important to remind that the maximum AC voltage must not exceed the DC working voltage of the capacitor. Commonly used fixed capacitor working voltages are 6.3V, 10V, 16V, 25V, 50V, 63V, 100V, etc.