> -----Original Message-----
> From: Alan B. Pearce [mailto:A.B.Pearce@RL.AC.UK]
> Sent: Tuesday, November 19, 2002 4:18 AM
> To: PICLIST@MITVMA.MIT.EDU
> Subject: Re: [EE]: IEC-60745 & circuit boards
>
>
> >In other words, components in the secondary side must
> >be 8mm away from anything on the primary side. I've
> >never heard of this. Can anyone shed some light on this?
>
> This is the reason many opto isolators for mains use come in
> a o.4 inch pin
> space package instead of a 0.3 inch pin space.

 Thanks for the input.  So this is an actual requirement then? The design
also uses a ltv814 optocoupler, which has TUV, VDE, UL & CSA approvals. But
the distance between the optically isolated pins is slightly less than 8mm.
Closer to 7mm if one were to use a standard land-pattern. Hmmm.

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