CD15FD391JO3 is a standard dipped silvered mica capacitor designed for timing and close tolerance applications requiring stable capacitance over a wide temperature range. This capacitor features a capacitance value of 390 pF with a rated voltage of 500 Vdc, meeting EIA RS153B dimensional specifications. The unit exhibits excellent stability characteristics with an operating temperature range of -55°C to +125°C, a minimum dV/dt pulse capability of 100,000 V/µs, and a capacitance tolerance of ±5% (J-grade). With dimensions of 0.47 inches length, 0.39 inches height, 0.21 mm thickness, 0.234 mm spacing, and 0.025 inch lead diameter, this component is widely used in precision timing circuits, RF applications, and other demanding electronic systems where high stability and reliability are essential.