Instead, use the link box to link to another page. Just type a nice message (short messages are blocked as spam) in the box and press the Post button. To this massmind site! (posts will be visible only to you before review) The results tables will be updated automatically.Īfter you find an appropriate page, you are invited to Ideally, keep "hot" and "cold" areas of your board well apart.Ĭhange a value in an input field, then press TAB to move to the next field. Note that if there is no conformal coating and the environment isĭirty/humid/condensing then all bets are off. Note that there are many international standard for this sort of thing, e.g.ĮN60065:1994, which for European mains of 230V, allows for about 120mil forĬlass I (protected by earthing) and 240mil for Class II (double isolated). The formulae as it stands is simplistic, but is reasonable for V > 50. I've added a recommended track clearance value based on the UL rule:Ĭlearance in inches = 0.023" + (0.0002" x V) UltraCAD PCBTEMP utility, and like the diagrams in the standards documents,Īre valid up to 35A, 400mil traces and a maximum temperature rise of 100☌. However, at this time, I don't know of a good way to do calculations for wagon wheel spokes. Generally, the wagon wheel spokes do not have to be anywhere near as wide as long traces. The values calculated here compare very closely with those derived by the The trace width calculator uses empirical formulas based on long traces with no special heat sinking.
I = 0.0647 x dT 0.4281 x A 0.6732 for external tracesĭT = temperature rise above ambient in ☌ I will not be held responsible for any mishap or loss, either direct orĬonsequential, that may occur as a result of relying on the figures herein. The figures returned by this calculator are to be taken as a guide only.
Low frequency, perfect conductor: no skin effect. Relative Permeability is assumed to be 1. The original idea for this approach was from Brad Suppanz. Trace Inductance calculator for wide traces over a ground plane with trace width (W) much larger than substrate thickness (T). The approximations and rationale are described in This page calculates approximations to the ANSI/IPC-D-275 and IPC-2221 design
Minor modificatons (which are probably to blame for any bugs) by James Newton. Calculating the required width and thickness for PCB traces is all about managing heat. You need JavaScript enabled to run this calculator Printed Circuit Board, Trace Width Calculator