Types: EC type high frequency switch transformer EE, EI type high frequency switch transformer PQ type high frequency switch transformer EFD type high frequency switch transformer EP type magnet-shielding switch transformer RM type communication filter, aux power transformer ET and FT type linearity filter T (ring) type filter and switch transformer G (jar-shaped) switch transformer DR (I) type transformer T (ring) iron power core, DC filter inductor Applications: switching power supplies, chargers, TV and CRT monitor display, UPS, VCD/DVD players, audio and visual equipment, OA machines, and inverter