Download the CDV30FH821J03F datasheet PDF.
This datasheet also covers the CDV19CF050D03F variant, as both devices belong to the same mica capacitors family and are provided as variant models within a single manufacturer datasheet.
Mica Capacitors, Standard Dipped
Types CD10, D10, CD15, CD19, CD30, CD42, CDV19, CDV30
Stability and mica go hand-in-hand when you need to count on stable capacitance over a wide temperature range.