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'[EE]:High Voltage Caps'
2002\09\08@132944 by Francois Robbertze

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I ordered 0.01uF 250V Cer Caps for a telephone applicaton(CID & DTMF
Decoding). (CMX602BP & M8870)
The distubutor send me a 0.01uF X2 Type cap. What is the meaning of the X2?
Is this just a high voltage cap? Will this X2 type cap also block the DC to
keep the telephone "line on the hook"?

A while ago I experiment with a phillips power line modem and the datasheet
specify a .47uF X2 Type cap. I have implement this home automation chip with
this X2 type cap and it works fine...

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2002\09\08@180542 by Jinx

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> Is this just a high voltage cap?

Yes, and X2 implies a "quality" capacitor. They are self-healing,
self-extinguishing, etc etc. Often found in SMPS, voltage droppers,
suppressors, or where long-term reliablity in stressful conditions
is important

> Will this X2 type cap also block the DC to keep the telephone
> "line on the hook"?

Yes. I'm no rules and regulations person but I'm guessing the
phone company would not be displeased to see X2 components

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2002\09\09@033539 by Morgan Olsson

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Hej Francois Robbertze. Tack för ditt meddelande 18:16 2002-09-07 enligt nedan:
>I ordered 0.01uF 250V Cer Caps for a telephone applicaton(CID & DTMF
>Decoding). (CMX602BP & M8870)
>The distubutor send me a 0.01uF X2 Type cap. What is the meaning of the X2?

X2 are rated to safely be ysed between L and N on 230VAC line input.
(used for noise suppression)
So, it can cope with 230VAC PLUS TRANSIENTS.

This is far more than your requested 250VDC, so i is OK.

BTW, "Y" types are rated to be used between L and GND, and N and GND, for noise suppression.

/Morgan

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2002\09\09@152104 by Harold M Hallikainen

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X and Y capacitors are EMI suppression capacitors. The X capacitor is
designed for across the line, while the Y capacitor is designed for line
to chassis. The number after the X or Y indicates the voltage rating and
various other parameters on the capacitor. For details, see

http://www.evox-rifa.com/technote_pdf/rfi_fact.pdf


Harold


On Sat, 7 Sep 2002 19:16:32 +0200 Francois Robbertze <fr10spamKILLspamMWEB.CO.ZA>
writes:
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