Jun 27, 2011 #1 T themaccabee Full Member level 4 Joined Apr 1, 2007 Messages 201 Helped 6 Reputation 12 Reaction score 6 Trophy points 1,298 Activity points 3,003 Hi, I 've got a PCB in which 85V is being generated. I would like to know how much minimum trace separation needs to be maintained between this 85V trace & other traces (say GND). (The current rating of this 85V supply is 50mA only) Thanks , Regards
Hi, I 've got a PCB in which 85V is being generated. I would like to know how much minimum trace separation needs to be maintained between this 85V trace & other traces (say GND). (The current rating of this 85V supply is 50mA only) Thanks , Regards
Jun 27, 2011 #2 N nelsonys Member level 4 Joined May 23, 2011 Messages 77 Helped 8 Reputation 16 Reaction score 8 Trophy points 1,288 Activity points 2,034 It depends on the standard that you are complying. For eg. IPC2221 or UL standard. Besides is this a product? Or your own hobby circuit? If it is just for normal use, 1-2mm would be suffice for creepage distance. In fact, 2mm is a bit harsh already.
It depends on the standard that you are complying. For eg. IPC2221 or UL standard. Besides is this a product? Or your own hobby circuit? If it is just for normal use, 1-2mm would be suffice for creepage distance. In fact, 2mm is a bit harsh already.
Jun 27, 2011 #3 M mayank.bhaintwal Newbie level 4 Joined Oct 23, 2010 Messages 5 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,281 Activity points 1,304 current rating is very small.u hav to give thick plane 4 power signals with minimum .1mm nd max .5 mm spacing is sufficient.
current rating is very small.u hav to give thick plane 4 power signals with minimum .1mm nd max .5 mm spacing is sufficient.
Jun 28, 2011 #4 N nelsonys Member level 4 Joined May 23, 2011 Messages 77 Helped 8 Reputation 16 Reaction score 8 Trophy points 1,288 Activity points 2,034 I guess current has nothing to do with clearance. We decide trace width according to current, and clearance or creepage according to voltage.
I guess current has nothing to do with clearance. We decide trace width according to current, and clearance or creepage according to voltage.
Jun 28, 2011 #5 andre_luis Super Moderator Staff member Joined Nov 7, 2006 Messages 9,639 Helped 1,191 Reputation 2,401 Reaction score 1,216 Trophy points 1,403 Location Brazil Activity points 55,903 The bandwidth of signal also must be considered. Higher frequencies components of signal can propagate in dielectric air more easilly. +++
The bandwidth of signal also must be considered. Higher frequencies components of signal can propagate in dielectric air more easilly. +++