"Ross Herbert" wrote in message
...
On Wed, 06 Aug 2008 03:05:19 GMT, Ross Herbert
wrote:
:X2 is not recommended for the particular application.
:
:I have always tried to use Evox-Rifa (in the 60's they were simply Rifa)
because
:they were very reliable. Of course, with all the mergers/takeovers since
those
:days I don't know how their reliability has changed, if at all.
:
:Have a look at the range of PHE426 pulse caps here
:http://www.evoxrifa.com/n_america/specs_pulsecaps.htm
:
:This series does not have 15nF/630V in 15mm lead spacing but if you want
more
:than a few you may be able to order the 10mm spacing with lead length of
30mm
:instead of the standard 6mm.

The X2 you are using is probably this one
http://www.vishay.com/docs/28118/mkp3384.pdf

Since X2 caps are generally physically larger for a given value than a
standard
MKP or other film type the space available appears to allow a component
measuring at least 5 x 11 x 17.5. You may be able to find ahigher voltage
standard pulse cap of similar size.

Sticking with the Vishay (BC) brand, the 2222 378 64153 in this range
would be
ideal http://www.vishay.com/docs/28134/mkp378.pdf


Thanks all for your views and good input. Plenty of food for thought and
further research. I have looked at Vishay's list of re-sellers and will have
a look at their websites to see if I can find any that keep the 378 series
in the value I need. The 'usual suspects' like RS and Farnell are there, but
these caps don't seem to be in their catalogues here in the UK, although
others - the X2s that I have tried for instance - are. I will have a look at
Arrow etc when I have time.

TA

Arfa