PQSine® - Active Harmonic Filter and Power Optimizer Technical Support Tools Product Top Page Search by Part No. Search by Characteristics Catalog Tech Notes Technical Support Tools more Product Top Page Search by Part No. Search by Characteristics Catalog Tech Notes Technical Support Tools Product Top Page Search by Part No. Search by Characteristics Catalog Tech Notes Technical Support Tools PFC Glossary A summary of terms relating to EPCOS brand components for PFC and harmonic filtering.