CD17ED390JO3F is a high-frequency mica capacitor designed for CATV and RF applications, offering controlled resonance-free performance through 1 GHz. The capacitor features a rated voltage of 500V and maintains near-zero capacitance change with temperature, voltage, and frequency variations. It exhibits very high Q at UHF/VHF frequencies with a typical dissipation factor of 0.0005 and provides 100,000 V/µs dV/dt capability minimum, along with ultra-low ESR for cool operation. The device is shockproof and delamination-free with low, notch-free impedance extending beyond 1 GHz, making it ideal for precision RF tuning, impedance matching, and high-frequency signal conditioning in demanding communication and broadcast systems.