Thermal jumper chips (TJCs) are surface mount (SMD) chip-sized components which have two pads (e.g. just like 0603 resistors). They are designed to provide good thermal conductivity between the two pads but the pads are electrically isolated from one another. They are typically made from aluminium nitride (AIN), which has a thermal conductivity of around
They are used to reduce the temperature of components and high-heat areas on a PCB, and can thermally connect “live copper pours” to better heat-sinked parts of the PCB such as the ground plane.
TT Electronics manufacturers a family of thermal jumper chips called the TJC series1.
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