Block N87 E 70 Transformer Ferrite Core, 9700nH, For Use With Reactors, Transformers

FS-1E series size 70/33/32 ferrite transformer cores made from N87. These standard 'E' type ferrite transformer cores are available with air gaps inserted:
Stock number 840-7478 has a 0.1mm gap
Stock number 840-7566 has a 0.2mm gap
Stock number 840-7648 has a 0.5mm gap
Stock number 840-7721 has a 1.0mm gap
Typical applications for these ferrite cores include transformers and inductors in switch mode power supplies

Transformer Ferrite Kits - Cores

The A_L value in the table applies to a core set consisting of two cores without air gap Cores ETD conform to IEC 51(CO)276