Power and Heat Impact on PCB Printed Circuit Board Material Selection

Out of all the factors that impact PCBs, two of the most intensive are power and heat. Therefore, it's crucial to determine the thresholds for each, which can be done by assessing the thermal conductivity of a PCB. This defines how wattage power is turned into temperature through the length of the material. However, there are no established industry-wide values for thermal conductivity.

For example, Rogers Corp. carries a PCB material, RT/duroid 5880, that is often applied in EW and communications. The dielectric constant of this material is low, as it's a composite material that contains microfibrous glass elements. These microfibers aim to boost strength of the fiber in the material.

Although the PCB printed circuit board is ideal for applications utilize high frequencies, the material's low thermal conductivity, made it easily heat, which can be a huge drawback in heat-intensive applications.

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