IGBT　is　the　core　component　of　the　hybrid　direct　current　circuit　breakers　(DCCB),　whose　junction　temperature　is　the　key　indicator　for　evaluating　the　ability　of　devices　to　withstand　short-circuit　current　surges　and　ultimate　breaking　capacity.　Thus,　it　is　important　to　evaluate　the　junction　temperature　of　IGBT　under　DC　interruption　application.　At　present,　the　main　method　for　evaluating　IGBT　temperature　is　combining　the　finite　element　method　(FEM)　simulation　and　Cauer　Thermal　Network　(CTN)　model,　which　needs　a　large　calculation　amount　and　extracting　IGBT　physical　structure　parameters　with　complicated　steps.　In　this　paper,　the　IGBT　model　for　DC　interrupting　is　built,　and　a　junction　temperature　prediction　model　based　on　a　fast　Forster-Cauer　conversion　algorithm　is　proposed.　The　IGBT　power　loss　during　DC　interruption　is　taken　as　input,　combined　with　junction　temperature　evaluation　model　to　realize　the　rapid　acquisition　of　temperature　distribution　between　the　physical　layers　of　IGBT.　The　©　results　are　shown　to　verify　the　feasibility　of　IGBT　junction　temperature　evaluation　model.　It＇s　a　kind　of　simple　and　fast　simulation　model　without　obtaining　the　detailed　physical　parameters　in　advance　and　suitable　for　temperature　distribution　research　of　IGBT　core　layers　for　turn-off　transients　under　the　large　current　surges.　©　2020　Institution　of　Engineering　and　Technology.　All　rights　reserved.