Power Coefficient of Resistance (PCR) is a lesser-known parameter, but is still extremely important. It quantifies the resistance change due to self-heating when power is applied. This demonstration provides an explanation of the primary factors that influence resistor stability in a real environment, compared to the specifications in a datasheet. The Bulk Metal® foil resistor maintains all its design, physical, and electrical characteristics, while resistors made from winding of wire or sputtering of thin film do not.
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