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What capacitor for the gate controller after a power surge?

stefan1908 3426 11
Best answers

What replacement varistor should I use for the burnt blue component beside the 220 V input in my gate controller?

The burnt blue part beside the 220 V input is most likely a varistor, not a capacitor, and it protects the controller from surges [#15735792] It was described as a blue, roughly 20 mm part, with S20K275 suggested as the likely type [#15737641] After zooming in on the markings, the original part was identified as ZOV 14D 431K [#15804613] The recommended replacement was S14K275, which was said to fit exactly as a substitute for the original [#15824924] One user then installed that part and confirmed that everything worked properly again [#15825090]
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  • #1 15735274
    stefan1908
    Level 11  
    Posts: 154
    Rate: 22
    Hello I have this problem. Yesterday the workers from tauron were doing something to the mains and after switching the power back on there was a big bang in the house and all the electronic devices including the gate controller went out. The controller shows that there is a burnt (torn) capacitor just below the 220V power plug. Maybe one of my colleagues could suggest what kind of capacitor could be used there, because the old one doesn't give any readings
    Attachments:
    • What capacitor for the gate controller after a power surge? Bez tytułu.png (3.27 MB) You must be logged in to download this attachment.
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  • #2 15735291
    niewolno2
    Level 40  
    Posts: 4694
    Help: 628
    Rate: 1257
    How sure are you that there was a capacitor there?
  • #3 15735724
    stefan1908
    Level 11  
    Posts: 154
    Rate: 22
    I don't know if it's a capacitor, or if it's called something else, but I can see that it's burnt out and it's just the side where the markings are.It's plugged in parallel to the 220v supply, the size of a 50groszy and it's blue in colour
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  • #4 15735745
    niewolno2
    Level 40  
    Posts: 4694
    Help: 628
    Rate: 1257
    Try to solder this component then perhaps from the description on the PCB you will be able to find out what it is.
  • #5 15735761
    stefan1908
    Level 11  
    Posts: 154
    Rate: 22
    For the time being I have to wait for the commission from TAURON which will estimate the losses, and there is quite a lot of it, all white goods, washing machine dishwasher cooker
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  • #6 15735792
    Zbych034
    Level 39  
    Posts: 4693
    Help: 550
    Rate: 1417
    Wait for the commission, then you will see what is worth doing. Most often they will reimburse the cost of repair or replacement if it can't be repaired. You will need a VAT invoice for reimbursement. Your fault looks simple and the faulty component is probably a varistor. The purpose of the varistor is to protect the equipment from surges.
  • #7 15737027
    stefan1908
    Level 11  
    Posts: 154
    Rate: 22
    But what kind of varistor could be there because you can't read anything from the old one, the only thing is that it is blue in colour. One more thing, what are the symptoms of a tripped varistor, because now my fuse in the controller blows all the time
  • #9 15737641
    domsat
    Level 23  
    Posts: 760
    Help: 46
    Rate: 182
    Almost certainly a S20K275 varistor, blue with a diameter of 20mm. It costs about PLN2.
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  • #10 15804613
    stefan1908
    Level 11  
    Posts: 154
    Rate: 22
    Hello, I finally managed to find the values of this varistor. It is a ZOV 14D 431K,(you can see when you zoom in) but I can't find one anywhere.What replacement could I give
    Attachments:
    • What capacitor for the gate controller after a power surge? 20160715_194428.jpg (2.34 MB) You must be logged in to download this attachment.
  • #11 15824924
    leotdipl
    Level 23  
    Posts: 499
    Help: 51
    Rate: 153
    stefan1908 wrote:
    Hello, I finally managed to find the values of this varistor. It is a ZOV 14D 431K,(you can see when you zoom in) but I can't find one anywhere.What replacement could I give


    reverence,

    colleague @domsat has already written to you. However, I suggest a small correction.
    Instead of S20K275 ===> S14K275 (lower power, i.e. 0.6W) and
    therefore the S14K275 exactly fits as a replacement for yours.
  • #12 15825090
    stefan1908
    Level 11  
    Posts: 154
    Rate: 22
    Thanks, That's the one I used that my colleague domsat suggested, because I couldn't find the smaller one, the most important thing is that everything works nicely. Many thanks to colleagues who helped me solve the problem :D :D :D
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