Help to identify capacitor please

Apr 11, 2011 7 Replies
M

Please can anyone help me to identify a capacitor.


It is fitted to an MK Sentry RCD socket, it is fitted in position C6 and is used as the mains dropper to power the RCD circuitry.


It's only markings are 334K250 on the top line and NIS~S82 on the bottom line.


The socket has an active RCD and the Reset button will not hold in. I think that not enough voltage is being applied to the circuit, because if I apply 18V dc to the circuit it will latch the solenoid, but out of the mains derived supply I am only getting about 10V.


TIA



Mark


Markt
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N

33* 10^4 pico farad, 250V but would have to be self-healing type, not polyester
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P

"Markt"

** Its a 330 nF cap rated at 250 volts DC - a very poor choice by the maker.

..... Phil

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P

"Nutcase Kook"

** Really ?

So polyester caps are not " self healing " ??

.... Phil

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M

Thanks Phil

I take it that you mean the working voltage is to low, what voltage would be appropriate?

Mark

Markt
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P

"Markt"

** Film caps rated for continuous use across the AC supply are special types - known as class X1 or class X2

They are AC voltage rated, usually at 150 or 275 volts and carry logos from agencies like UL.

..... Phil

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M

Thanks again Phil

I have seen X1 & X2 caps in the R.S. and Farnell books thanks for the advice.

Mark

Markt
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