High Current Calculator

This tool offers a quick and easy way to calculate the required track width for high-current conductor tracks on an FR4 PCB. Please enter the following values:

°C

Maximum
ambient temperature

°C

Maximum
PCB temperature

A

Maximum
continuous current

The result gives a recommendation for the design track width of a single high current conductor for various PCB technologies.*

Calculate

	Heatspreading capacity inside the PCB 160 mm x 100 mm x 1.6 mm
	None	Low	High	Very high
Total copper thickness	Recommended track width
500 µm HSMtec®	mm	mm	mm	mm
400 µm Thick copper	mm	mm	mm	mm
210 µm Thick copper	mm	mm	mm	mm
105 µm Multilayer	mm	mm	mm	mm
70 µm Multilayer	mm	mm	mm	mm

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The calculation returns a guide value on the basis of a 160 x 100 mm test layout. Thickness 1.6 mm. Base material of PCB FR411 = 0.25 W/mK. No convection 11 = 0.025 W/mK. Room temperature 20⁰C.