DIN IEC 60723-4:1990-02

This publication also bears a QC number. This number QC 250300, is the specification number in the IEC Quality Assessment System for Electronic Components (IECQ). Lists the characteristics, ratings and also the inspection requirements for magnetic oxide cores of assessed quality for transformers and chokes for power applications intended for professional and industrial applications, excluding broadband and tuned transformers, and mains frequency power transformers. It selects from the generic specification, Publication 723-1, and from the basic specification, Publication 367-1, the appropriate methods of test to be used in detail specifications derived from this specification, in accordance with the corresponding blank detail specification.