A fuel injector (10; 300) for injecting fuel into a combustion engine, the fuel injector (10; 300) comprising an armature, a needle, a coil, a casing, a valve body, and a separation ring, wherein - the coil is arranged in the casing, - the armature and the needle are at least partially arranged in the valve body, - the coil is electrically connectable to a control device in order to generate an electromagnetic field, - the armature is connected with the needle, - the armature is configured to interact with the electromagnetic field in order to displace the needle from a closed position towards an open position along a longitudinal axis of the valve body, - the separation ring is at least partially arranged between the casing and the armature and configured to lead the electromagnetic field to the armature, - the casing is arranged on an outer peripheral surface of a portion of the valve body, - the separation ring comprises a first section with a first material and at least a second section with a second material, the first material differing from the second material - the first section of the separation ring comprises at least a separation ring base body, the second section comprises at least a separation ring insert, the separation ring base body comprising at least an opening which is shaped correspondingly to the separation ring insert and configured to at least partly receive the separation ring insert - the first section of the separation ring comprises an inner section and an outer section, wherein the outer section is arranged in a radial direction outside of the inner section, characterized in that the inner section is connected to the outer section via at least a bar, wherein the opening is arranged between the inner section and the outer section, wherein the bar is configured to carry the second section. - the coil is arranged in the casing, - the armature and the needle are at least partially arranged in the valve body, - the coil is electrically connectable to a control device in order to generate an electromagnetic field, - the armature is connected with the needle, - the armature is configured to interact with the electromagnetic field in order to displace the needle from a closed position towards an open position along a longitudinal axis of the valve body, - the separation ring is at least partially arranged between the casing and the armature and configured to lead the electromagnetic field to the armature, - the casing is arranged on an outer peripheral surface of a portion of the valve body, - the separation ring comprises a first section with a first material and at least a second section with a second material, the first material differing from the second material - the first section of the separation ring comprises at least a separation ring base body, the second section comprises at least a separation ring insert, the separation ring base body comprising at least an opening which is shaped correspondingly to the separation ring insert and configured to at least partly receive the separation ring insert - the first section of the separation ring comprises an inner section and an outer section, wherein the outer section is arranged in a radial direction outside of the inner section, characterized in that the inner section is connected to the outer section via at least a bar, wherein the opening is arranged between the inner section and the outer section, wherein the bar is configured to carry the second section.