The ATC 800R Series from American Technical Ceramics is a RF Capacitor with Capacitance 1 to 100 pF, Frequency 150 to 1000 MHz, Q Factor 2000, Dielectric Strength 250% of Rated Voltage, ESR 0.026 to 0.055 Ohms. Tags: Ceramic Capacitors, MLCC. More details for ATC 800R Series can be seen below.