There are so many types and models of capacitors that many people can't accurately judge whether the capacitor is divided into positive and negative electrodes in the process of using them. How to correctly identify the positive and negative electrodes of capacitors? Today, I'd like to share with you some common identification methods of positive and negative electrodes of capacitor pins.
Common electrolytic capacitor
The one marked with "-" on the shell of the capacitor is negative, and the other is positive. The negative electrode is generally gray white, and the positive end is mostly black. Identification method 2: in the newly purchased capacitor, the long one represents the positive pole of the capacitor and the short one represents the negative pole of the capacitor.
Chip aluminum electrolytic capacitor
The purpose of putting the two capacitors together is to distinguish the difference between the positive and negative electrodes of the two kinds of capacitors. The aluminum electrolytic capacitor is cylindrical in shape, and its positive and negative electrodes are identified by a black mark on the top of the capacitor. The black part is the negative electrode, and the other is the positive pole. The other pole is the negative pole. Or to say: one end is irregular is the positive pole, the other end is the negative pole.
Identification method of chip tantalum electrolytic capacitor
Tantalum electrolytic capacitor shape is a cuboid, with a stripe of the pole is the positive pole (remember)! This looks abnormal. Just remember.
Positive and negative pole identification of fine tuning capacitor and variable capacitor
Identify the trimming capacitor (that is, the capacitor that is fine adjusted by a screw driver). Generally, the requirements for the positive and negative poles of the capacitor are not very strict. However, in order to prevent the influence of the process of adjusting the capacitance on the circuit board system, the moving piece is usually defined as the negative pole connected to the ground of the circuit board, and the other pole is the positive pole. The positive and negative pole identification of variable capacitor is the same as that of fine tuning capacitor, but the dynamic fixed pin of variable capacitor is better to distinguish. Generally, for single variable capacitor, the pin at both ends is fixed, and the pin in the middle is connected to the negative pole of the circuit.
The above is the common capacitor pin positive and negative pole identification method, hope to help you! If you need to purchase capacitors, please contact us at any time. Shandong Hongbao Electronic Co., Ltd. deals in various types of capacitor components with complete models and good performance. We are looking forward to cooperating with you.