Block FS-1E Series Size 55/28/25 Ferrite Transformer Cores
FS-1E series size 55/28/25 ferrite transformer cores made from N87. These standard 'E' type ferrite transformer cores are available with air gaps inserted: Stock number 840-7471 has a 0.1mm gap Stock number 840-7553 has a 0.2mm gap Stock number 840-7636 has a 0.5mm gap Stock number 840-7724 has a 1.0mm gap