SFTN3005R Description
Unit from Juntion to Ambient 1) RθJA 62 ℃/W from Juntion to Case RθJC 3.8 ℃/W 1) RθJA is the sum of the junction-to-case and case-to-ambient where the case thermal reference is defined as the solder mounting surface of the drain pins. RθJC is guaranteed by design while RθCA is determined by the user's board design. RθJA shown below for single device operation on FR-4 in still air.