Applying a negative voltage for an extended period to an electrolytic capacitor results in a briefly exciting but catastrophic failure. That stripe indicates the negative lead.
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Almost all electrolytic capacitors are polarized which means that the voltage on the positive terminal must always be greater than the voltage on the negative terminal.
Electrolytic capacitor negative side. You can determine an electrolytic capacitor polarity by measuring its voltage drop and capacitance in an electric circuit. Use safety precautions when working with capacitors. The lead closest to that stripe or minus sign is the negative lead and the other lead which is unlabeled is the positive lead.
The benefit of large capacitance in electrolytic capacitors comes with several drawbacks as well. Polarized capacitors have polarity markings usually a minus sign on the side of the negative electrode for electrolytic capacitors or a stripe or a plus sign. Also the negative lead for leaded wet e caps is usually shorter.
To determine polarity in capacitors. A plus or minus sign is written near any one of the lines to represent whether it is positive or negative terminal anode or cathode. Electrolytic capacitors have a positive and negative side.
If its an axial leaded capacitor leads come out of opposite ends of the capacitor the stripe may be accompanied by an arrow that points to the negative lead. The can or case of the electrolytic is usually the negative. The electrolytics have a stripe of minusses down the side near to the negative lead or as mentioned below a groove around the end near the positive side.
Some non polarised capacitors are shown below. Below are 10uf left and a 1mf electrolytic capacitors each of which has a dash symbol to mark the negative leg as well as a longer positive leg. The longer lead of the electrolytic capacitor is the positive lead.
The polarity of an electrolytic capacitor is marked on the capacitor body the negative lead of the capacitor is marked. Make sure you pay close attention to the capacitor positive side and negative side such that you dont damage it or the rest of the circuit. Electrolytic capacitors are often marked with a stripe.
To tell which side is which look for a large stripe or a minus sign or both on one side of the capacitor. Electrolytic capacitors are mostly in the micro farad range eg. That stripe indicates the negative lead.
The electrolytic capacitor is represented by two parallel straight lines or one straight line and one curved line.
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