CD15FD121JO3 is a standard dipped silvered mica capacitor designed for timing and close tolerance applications requiring stable capacitance over a wide temperature range. This CD15 series capacitor features a capacitance of 120 pF with ±5% tolerance (J) and a rated voltage of 500 Vdc. The capacitor operates over a temperature range of -55°C to +125°C and offers excellent stability with a minimum dV/dt pulse capability of 100,000 V/µs. Dimensions meet EIA RS153B specification, making it suitable for precision circuits, timing applications, and RF filtering where stable capacitance is critical.