This standard specifies the dimensions that are of importance for mechanical interchangeability for a preferred range of pot-cores made of magnetic oxides, and the dimensional limits for coil formers to be used with them. The general considerations upon which the design of this range of cores is based are given in annex A.
IEC 60133:2000 history
2000IEC 60133:2000 Dimensions of Pot-Cores Made of Magnetic Oxides and Associated Parts (Edition 4.0)
1985IEC 60133:1985 Dimensions of pot-cores made of magnetic oxides and associated parts
1970IEC 60133:1967 Dimensions for pot-cores made of ferromagnetic oxides and associated parts
1970IEC 60133:1961 Dimensions of pot-cores made of ferromagnetic oxides
IEC 60133:2000 Dimensions of Pot-Cores Made of Magnetic Oxides and Associated Parts (Edition 4.0) was changed to IEC 62317-2:2010 Ferrite cores - Dimensions - Part 2: Pot-cores for use in telecommunications, power supply, and filter applications.