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Capacitor replacement

Former Member

Hello everyone!

I would need your help solving a little problem where I am not sure of the value of a capacitor that I need to replace.

I have never seen a capacitor like this one (yep, I'm a noob) so I searched online for some info and I though I could read it's value...the problem is that when I desoldered it from the board I noticed that on the other side it had other things written that, to my little knowledge, suggest a different value. Here are the pictures:

 

image

From this one I read that the precision is B, and the value is 4.1 uF with max 400v. The rest of the letters I have no idea what they mean.

image

From this one I read that it is a 4,7 pF capacitor and the precision is M. The rest I do not understand.

 

What I would really like to know is what the actual value of the capacitor is and if possible, what the various things on both sides mean so that in the future I will be able to read them.

Thank you very much in advance

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  • 0 in reply to clem57

    Could it have burned inside?

    Yes, but generally they seem to either self destruct, or blow bits off.

    The construct means there isn't room for any gases to escape, hence the damage.

     

    If it is damaged, then there are other things usually that have gone bang in a much bigger way.

    It's a small value and I'm picking it is associated with the incoming mains (due to the holes in the pcb and the 400v rating).

    It could be part of a bypass across the phase and neutral, or to chassis.

     

     

    Mark

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