700 A & B Series Multilayer Capacitors American Technical Ceramics (ATC) / AVX 700 A & B Series NPO Porcelain and Ceramic Multilayer Capacitors are RF/Microwave capacitors that exhibit improved ESR/ESL performance in a high-density porcelain and ceramic construction that provides a rugged, hermetic package. The 700 A & B Series Multilayer Capacitors from ATC / AVX offer superior high self-resonance and zero TCC characteristic which provides excellent performance over a broad range of RF and microwave applications requiring minimum drift.