A merged-PN-Schottky, MPS, diode includes an N substrate, an N-drift layer, a P-doped region in the drift layer, an ohmic contact on the P-doped region, a plurality of cells within the P-doped region and being portions of the drift layer where the P-doped region is absent, an anode metallization on the ohmic contact and on said cells, to form junction-barrier contacts and Schottky contacts respectively. The P-doped region has a grid-shaped layout separating from one another each cell and defining, together with the cells, an active area of the MPS diode. Each cell has a same geometry among quadrangular, quadrangular with rounded corners and circular; and the ohmic contact extends at the doped region with continuity along the grid-shaped layout.