The ATC 900C Series from American Technical Ceramics is a RF Capacitor with Capacitance .01µF to 1µF, Frequency 30 MHz, Dielectric Strength 250% of Rated Voltage, ESR 0.02 to 0.059 Ohms, Voltage (WVDC) 100 to 300 V. Tags: Ceramic Capacitors, MLCC. More details for ATC 900C Series can be seen below.