You can use this "empiric" rule (used in industry, generally, but also suggested into many books):
- Voltage Insulation: 10 volt x mil [ex: 200 volt = 20 mils] - Current, track dimension: the same for a air-wire, about 3A/mm or 3A/100mils for "long" tracks [>1 inch] up to 6A/mm or 6A/100mils for a short track; this for a FR4 (or similar) 35 micron Cu (standard, normally used, board). This condition only for a "continuous flux current" (ac or dc), the "worse case". More current for a more thickness of Cu or for a better duty-cycle. Excuse me for my English. Carlo, I2GOQ --- Lun 10/8/09, [email protected] <[email protected]> ha scritto: Da: [email protected] <[email protected]> Oggetto: [kicad-users] Fwd: more than one library importing at a time A: [email protected] Data: Lunedì 10 agosto 2009, 06:44 Dear SIR, Any one can let me know the pcb track size according to the voltage and current rating increases. For example if it is a 5v dc supply is passing through a track then what will be the track size and same also for current. Regards Rupak R Bangalore India.
