This paper presents the new Infineon 650V IGBT4. Designed especially for medium and large current applications 1(nom)> 300A, in comparison with the 600V IGBT3 the device offers a better softness during switch-off, and a higher blocking voltage capability. The measures used to realize these features were to increase the chip thickness, to reduce the MOS channel width, and to enhance the back-side emitter efficiency. As a consequence, also the short-circuit robustness is significantly improved.