The ATC 180R Series from American Technical Ceramics is a RF Capacitor with Capacitance 0.5 to 100 pF, Frequency 150 to 1000 MHz, Q Factor 10000, Dielectric Strength 250% of Rated VDC, ESR 0.08 to 0.205 Ohms. Tags: Ceramic Capacitors, MLCC. More details for ATC 180R Series can be seen below.