The maximum safe power dissipation in the AD8138 packages is limited by the associated rise in junction temperature (T J) on the die. At approximately 150°C, which is the glass transition temperature, the plastic changes its properties. Even temporarily exceeding this temperature limit can change the stresses that the package exerts on the die, permanently shifting the parametric performance of the AD8138. Exceeding a junction temperature of 150°C for an extended period can result in changes in the silicon devices, potentially causing failure.