IS/QC 250301 : 1988 : Inductor and Transformer Cores for Telecommunications Blank Detail Specification : Magnetic Oxide Cores for Transformers and Chokes for Power Applications Assessment Level A
| UDC 621.318.134.042.1 : 621.314.21 : 621.318.43 : 621.39 | LITD 24 |
|
| Reaffirmed 2015 |