EFD thiransifoma core imaphatikiza kutsika kwambiri komwe kumakhala ndi mphamvu yamphamvu kwambiri yodutsira ma frequency mpaka 1MHz ndi kupitilira apo. Transformer iliyonse, yotengera mtundu wa EFD, imakhala ndi kutalika kwa nyumba yocheperako kuposa mamangidwe aliwonse otsika omwe ali ndi mphamvu ya maginito yofanana.