What is this capacitor

[tomst]

Please could you help identify this type of capacitor. I Just it out of a Rotel RCD-965BX position C202. Numbers on it are 120P, F630, CN KS.
Thanks
Tom

 

[KatieandDad]

DEAD - VERY DEAD.

L.O.L.

It looks like a 120pF/630V Polypropylene but can you give us an idea of its size.

More to the point - HOW has a 630V cap got into that state ?

Polyprops are usually pretty reliable unless they are overheated.

 

[tomst]

10mm long about 3.5mm diameter

 

[KatieandDad]

That sounds about right. The larger diameter is because of its high voltage rating.

Might be worth waiting to see if anyone has the schematics to confirm the value.

 

[KatieandDad]

There isn't a C202

http://bwgroup-support.com/rotelservicemanuals.html

Purely from its voltage rating I would guess that its C001 - across the mains switch. I am guessing though.

 

[Elvee]

Please could you help identify this type of capacitor. I Just it out of a Rotel RCD-965BX position C202. Numbers on it are 120P, F630, CN KS.
Thanks
Tom

It is a Philips polystyrene capacitor of 120pF/1% 630V.

 

[tomst]

it's in the bottom right hand corner of U112 between 0AR0 and 0AR1-

 

[Pingrs]

Beat me to it.

Philips 120pF F=+/-1% 630V CN= Date KS= polystyrene (Unlacquered version)

Brian.

 

[KatieandDad]

I agree with ELVEE - my mistake polystyrene not polypropylene.

If you can ascertain where it is in the circuit we can offer a suggestion for a replacement.

 

[tomst]

I guess this would do as a replacement

FSCEX 120PF 1% 630V - LCR COMPONENTS - CAPACITOR, 120PF, 630V | Farnell United Kingdom

 

[KatieandDad]

How the hell did it get into that state.

You can use any 1% Polystyrene cap of 120pF in that position as long as the voltage rating is above the Vcc of the IC. I'd go for 63V just to be safe.

http://uk.farnell.com/lcr-components/fscex-120pf-1-630v/capacitor-120pf-630v/dp/9520678

Here's one as an example.

 

[KatieandDad]

How did that happen ? I managed to post a suggested replacement in your last post ?

FSCEX 120PF 1% 630V - LCR COMPONENTS - CAPACITOR, 120PF, 630V | Farnell United Kingdom

 

[tomst]

I caught it with a soldering iron.
Thanks for your help

 

[KatieandDad]

You might find these guys more helpful with small quantities but this is only a 3% component not 1%

Cricklewood Electronics - CCTV. CCTV Equipment. CCTV Systems. Digital CCTV Cameras

 

[tomst]

Thanks again I will keep them in mind.

 

[Mooly]

Looks like it's been burned by having a soldering iron to close.

Ebay purchase maybe ?

 

[KatieandDad]

Looks like it's been burned by having a soldering iron to close.

Ebay purchase maybe ?

Easy enough bit to get but nothing on E-Bay this afternoon.

I've never known one to fail though. OK this one is cooked, but they normally fail very early in their life.

 

[Mooly]

Easy enough bit to get but nothing on E-Bay this afternoon.

I've never known one to fail though. OK this one is cooked, but they normally fail very early in their life.

I meant the Rotel actually, sorry if it wasn't clear. There's no way a cap could fail in that location and it does just look like external burn marks tbh.

 

[KatieandDad]

I wonder why he suspected it in the first place ?

I'm out of my league here but if the IC is suspect - I would start with the Xtal.

 

[tomst]

The capacitor was fine until ,due to it being late and me being tired, i caught it with the soldering iron whist doing something else? Oh well these things happen.
Thanks again for your help.