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Polarity Identification for Soldering a Capacitor: Long Pin Significance?

morlook 49928 8
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Treść została przetłumaczona polish » english Zobacz oryginalną wersję tematu
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  • #1 1783780
    morlook
    Level 11  
    Hello, I want to solder a capacitor and the new one has one pin longer than the expensive one. With the shorter one, the rectangle is probably a minus, but I want to be sure. Write to me if it is so.
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  • #2 1783799
    Sylves_ter
    Level 17  
    Hi . buddy, the longer one is the PLUS of the capacitor and the shorter one is the MINUS. Greetings
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  • #3 1783898
    ogryz
    VIP Meritorious for electroda.pl  
    Hello!
    And if the legs are equal (e.g. a capacitor from the outlet), a minus is marked on the housing.

    Greetings.
  • #4 1784095
    kaczorele
    Level 14  
    long leg plus short minus it is the same with POZDRO LEDs
  • #5 1784113
    morlook
    Level 11  
    Thanks now I will know.
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  • #6 1784174
    Pi-Vo
    Level 37  
    As for the longer pins, it is correct, but as for the minus marking, it is only in electrolytic ones. They have a negative line marked with a minus, those with 2 identical tips riveted to the inner electrodes from the bottom have a black dot on the thread and it also means minus, which is sometimes written on the casing (black mark negative pole). Differently with tantalum capacitors. There it is marked plus, clearly + is marked. SMD (surface) tantalum capacitors no longer have a sign + only a thick line, but also with a plus and not a minus as in the case of ordinary electrolytes. It is worth remembering because you can make a mistake.
  • #7 1784898
    cyborg18
    Level 2  
    morlook wrote:
    Hello, I want to solder a capacitor and the new one has one leg longer than the more expensive one. With the shorter one, a rectangle is drawn, I think it's a minus but I want to make sure. Write to me if it is.

    The shorter leg is minus and the longer leg is +
  • #8 1784920
    Pi-Vo
    Level 37  
    It's what you think. The longer one is a plus and the rectangle is minus.
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  • #9 1979681
    morlook
    Level 11  
    Thanks all.
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Topic summary

The discussion centers around the identification of polarity when soldering capacitors, specifically regarding the significance of pin lengths. It is confirmed that the longer pin of a capacitor typically indicates the positive terminal (+), while the shorter pin represents the negative terminal (-). In cases where the pins are of equal length, the negative terminal is usually marked on the capacitor's casing. The conversation also highlights that electrolytic capacitors have a clear negative marking, while tantalum capacitors may have different identification methods, such as a thick line or a plus sign. Users emphasize the importance of correctly identifying these terminals to avoid mistakes during soldering.
Summary generated by the language model.
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