The ATC 600S 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 2.5 x WVDC, ESR 0.034 to 0.117 Ohms. Tags: Ceramic Capacitors, MLCC. More details for ATC 600S Series can be seen below.