Arc resistance will depend on many things. I have seen 60ish ohms on a gap that 50kv would jump in air. Your mileage will vary but that may work for a rough estimate. I am looking for spice models that are moderately accurate. On Aug 9, 2016 9:19 AM, "Bob Ammerman" wrote: As you increase the current, the voltage drop goes down. ~ Bob Ammerman RAm Systems > -----Original Message----- > From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] On Behalf > Of Electron > Sent: Tuesday, August 09, 2016 10:39 AM > To: Microcontroller discussion list - Public. ; piclist@mit.edu > Subject: RE: [EE] High current and voltage diode, but not fast recovery > > > >> On a side note, what is the impedance I can expect from an arc? So to > >> calculate the voltage required to make x Ampere flow through it. > > > >An arc is a negative resistance. > > Negative resistance? I do not understand what this means. > > -- > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist -- http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .