The FYLN-14N-10/20A-S/U is a specialized 3-phase 4-wire AC filter engineered for demanding environments where power quality directly impacts equipment performance. Designed for test laboratories and data centers, this filter effectively suppresses electromagnetic interference and harmonic distortion, protecting sensitive instrumentation from voltage fluctuations and unbalanced load conditions. With dual current ratings (10/20A), it adapts to varying operational requirements while maintaining consistent filtering performance. The S/U configuration ensures compatibility with unbalanced three-phase systems, making it ideal for facilities running mixed single-phase and three-phase loads. Essential for precision testing, data integrity, and extending equipment lifespan in critical infrastructure applications.