The ATC 100A Series from American Technical Ceramics is a RF Capacitor with Capacitance 0.1 to 100 pF, Frequency 150 to 1000 MHz, Q Factor 10000, Dielectric Strength 250% of Rated Voltage, ESR 0.028 to 0.39 Ohms. Tags: Ceramic Capacitors, MLCC. More details for ATC 100A Series can be seen below.