The ATC 800A Series from American Technical Ceramics is a RF Capacitor with Capacitance 0.1 to 100 pF, Frequency 150 to 1000 MHz, Q Factor 2000, Dielectric Strength 250% of Rated Voltage, ESR 0.032 to 0.081 Ohms. Tags: Ceramic Capacitors, MLCC. More details for ATC 800A Series can be seen below.