PA6331 Power Filter Inductors Coilcraft PA6331 Power Filter Inductors are low distortions choke used in Texas Instruments' TPA3251D2 PurePath Ultra-HD, TAS5612/14PHD2EVM, TAS5612PHD, and TAS5614PHD evaluation modules. The PA6331 power filter inductors are designed for class-D amplifiers. Available in COTS Plus tin-silver-copper and tin-lead terminations, the inductors are RoHS compliant, REACH compliant, halogen-free, and 260°C compatible.