This publication also bears a QC number. This number, QC 301900, is the specification number in the IEC Quality Assessment System for Electronic Components (IECQ). Applicable to fixed unencapsulated multilayer chip capacitors of ceramic dielectric, Class 1 and Class 2, with a rated voltage normally not exceeding 200 V, for use in electronic equipment. These capacitors have metallized connecting pads or soldering strips and are intended to be mounted directly on to substrates for hybrid circuits or on to printed boards.