... induction, high permeability, low coercivity, low loss and good stability. Ultra-crystalline Soft Magnetic Alloy Core 1. Material Grade: 1K 107 ... , EMC filter common mode inductance and differential-mode inductance, ISDN miniature isolation transformer, leakage protection switch, and so on. 3. ... maximum outside diameter of iron core can up to 1200mm. Ultra-crystalline Soft Magnetic Alloy Core