B82730U/G Power Line Chokes EPCOS / TDK B82730U/G Power Line Chokes are current-compensated U-core double chokes with a ferrite core and closed PET coil former (UL 94V-0). The B82730 series offers high resonance frequency and approximately 1.3% stray inductance for symmetrical interference suppression. The low whirring noise of these chokes makes them suitable for wave soldering. Applications for EPCOS / TDK B82730U/G Power Line Chokes include suppression of common-mode interferences, compact switch-mode power devices, electronic ballasts in lamps, and white goods.