ACM2012 Common Mode Filters TDK ACM2012 Common Mode Filters are ideal for automobile signal lines. The inductors feature excellent common mode impedance and noise suppression in a compact case. The low profile and small size make these TDK common mode filters optimal for surface mounting. The series is designed as a power line noise countermeasure for electronic equipment. TDK ACM2012 Common Mode Filters are AEC-Q200 qualified.