Würth Elektronik WE-FC Frame Core Common Mode Chokes include the WE-FC, WE-FCL, and WE-FCLP series. These chokes feature a closed rectangular core and approximately 1% to 2% stray inductance for symmetrical interference suppression. Würth Elektronik Frame Core Common Mode Chokes are ideal for mains operated LED drivers, electronic ballasts, switched-mode power supplies, and lighting applications.