Hello Daan, This sounds like a connection to mains supply. In which case there are safety compliance issues that must be addressed. I've just been designing some power supply boards with 240V AC input voltages (our mains voltage in Australia)We have a compliance engineer in our company who makes sure that we do the right thing with respect to safety compliance and EMC. The Comparative Tracking Index of the board material and the environment it is used in comes into play. This can become a complex issue. Our Australian Standard AS3260 is closely based on IEC-950, which would be a good place to start looking. (As an example, our spacing for 240V AC is at least 2.5mm.) regards, Phil. -----Original Message----- From: d. terstegge [mailto:[log in to unmask]] Sent: Tuesday, 27 November 2001 02:16 To: [log in to unmask] Subject: [TN] Isolation between connector pins Hi Technetters, On one of our new designs must be able to withstand a 220 Volt AC between two pins of a SMD-connector with a spacing between the pins of about 0.5 mm. This seems a bit on the critical side, and the designer asked me if it is possible to have some extra isolation between these pins. I was thinking that a drop of solderresist that we sometimes use for repairs would do the job, but I'm not sure that it'll work. Maybe someone can give me a better advice ? Daan Terstegge SMT Centre Thales Communications Unclassified mail Personal Website: http://www.smtinfo.net ---------------------------------------------------------------------------- ----- Technet Mail List provided as a free service by IPC using LISTSERV 1.8d To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt delivery of Technet send the following message: SET Technet NOMAIL Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ---------------------------------------------------------------------------- ----- --------------------------------------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8d To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt delivery of Technet send the following message: SET Technet NOMAIL Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ---------------------------------------------------------------------------------