Panasonic R-5575 XPEDION T1: the dielectric is one thermal resistancePanasonic R-5575 XPEDION T1: the dielectric is one thermalresistanceHeat input2 W assumedDielectric1 K/WRemainingthermal pathAcross this dielectric only: ΔT = P × R = 2 KNot junction temperature or board-to-ambient rise.