ER2806 for choke coil,ferrite choke coil,high current choke coil,helmholtz coil 1.features: ER2806 for choke coil,ferrite choke coil,high current choke coil,helmholtz coil 2.advantage:1. various designs of bobbins ... of switching power supply transformer,coke coils etc.•EC/EER core: applied in the linear filter ,current tranformer,smoothing choke coil,drive transformer ...