A semiconductor device and a method for forming a semiconductor device are provided. The semiconductor device includes a semiconductor body including a diode-structure with a pn-junction, and an edge-termination structure arranged in a peripheral area of the semiconductor body. The edge-termination structure includes an insulating region partially arranged in the semiconductor body adjacent the pn-junction and a semi-insulating region arranged on the insulating region and spaced apart from the semiconductor body. The semi-insulating region forms a resistor connected in parallel with the diode-structure.