Converter comprising - at least one magnetic field concentration device comprising two C-shaped magnetic field concentration elements which have in each case two legs and one web connecting the legs and are in each case received in a moulded part , wherein a respective moulded part has - a cavity with a web receptacle space which is configured to receive the web , a first leg receptacle space and a second leg receptacle space which are in each case configured to receive a leg , - a first positioning element by way of which the other moulded part is able to be positioned so as to be mirror symmetrical in relation to the moulded part , - a second positioning element which is disposed externally on a shell face of the moulded part that delimits the cavity , and the moulded parts by way of their first positioning elements are mutually disposed in such a manner that inner and/or frontal shell faces of the moulded parts at least partially enclose a conduit space , - at least one busbar which is led through the conduit space , - at least one magnetic field sensor which is disposed between free ends of a leg of a respective magnetic field concentration element of a magnetic field concentration device , and - a circuit board which is connected in an electrically conducting manner to the at least one magnetic field sensor and has a positioning element by way of which the second positioning element of a respective moulded part is able to be disposed on the circuit board . - at least one magnetic field concentration device comprising two C-shaped magnetic field concentration elements which have in each case two legs and one web connecting the legs and are in each case received in a moulded part , wherein a respective moulded part has - a cavity with a web receptacle space which is configured to receive the web , a first leg receptacle space and a second leg receptacle space which are in each case configured to receive a leg , - a first positioning element by way of which the other moulded part is able to be positioned so as to be mirror symmetrical in relation to the moulded part , - a second positioning element which is disposed externally on a shell face of the moulded part that delimits the cavity , and the moulded parts by way of their first positioning elements are mutually disposed in such a manner that inner and/or frontal shell faces of the moulded parts at least partially enclose a conduit space , - a cavity with a web receptacle space which is configured to receive the web , a first leg receptacle space and a second leg receptacle space which are in each case configured to receive a leg , - a first positioning element by way of which the other moulded part is able to be positioned so as to be mirror symmetrical in relation to the moulded part , - a second positioning element which is disposed externally on a shell face of the moulded part that delimits the cavity , and the moulded parts by way of their first positioning elements are mutually disposed in such a manner that inner and/or frontal shell faces of the moulded parts at least partially enclose a conduit space , - at least one busbar which is led through the conduit space , - at least one magnetic field sensor which is disposed between free ends of a leg of a respective magnetic field concentration element of a magnetic field concentration device , and - a circuit board which is connected in an electrically conducting manner to the at least one magnetic field sensor and has a positioning element by way of which the second positioning element of a respective moulded part is able to be disposed on the circuit board . <EOS>