UDRM=1550V, ITSM=7000A CHANGES WERE MADE IN THE SAFUX 315F500 THYRISTOR BRAKE MODULE ON 22 MARCH 1995. THYRISTOR MODULE IRKT 250-16S9 (CODE 10002044) WAS SUPERSEDED BY A NEW TYPE SKTT 250/16E (CODE 10022975). THE NEW THYRISTOR MODULE SKKT 250/16E CANNOT BE SUPPLIED AS A SPARE PART FOR THYRISTOR BRAKE MODULES MANUFACTURED BEFORE 22 MARCH 1995 DUE TO MECHANICAL DIFFERENCES. HOWEVER, IRKT 250-16S9 (CODE 10002044) CAN BE SUPPLIED AS A SPARE PART FOR ALL THYRISTOR BRAKE MODULES, MANUFACTURED EITHER BEFORE OR AFTER 22 MARCH 1995.