pcb trace clearance

[carmusic]

Hi i am presently designing a pcb and there will be 375V dc input, The pcb has solder mask. what should be minimum trace clearance for it to comply with safety agencies? is 30-40mil ok?

 

[mneary]

is 30-40mil ok?

No. It depends on your application, but it probably won't be smaller than 4mm (0.160").

 

[carmusic]

it is for a dc/dc converter, i'll will check power supply pcb to compare

 

[Boncuk]

To comply with CE-rules the trace distance should be at least 7.5mm (~300mil).

For more board space and only if a solder mask is applied you may reduce trace distance to 2mm, keeping them apart 7.5mm at terminals.

Boncuk

 

[carmusic]

ok thanks, i will modify my pcb according to that