Please refer to the manufacturer’s datasheet to verify that any suggested alternate will be viable for your application. These posts are suggestions only.
I’ve had to hunt for some specific values from the ATC 800A series from Kyocera/AVX only to find that we do not stock a number of capacitance values. If anyone is looking for similar alternatives, I’ve had good luck with the VJ HIFREQ HT series from Vishay Vitramon.
They may not be appropriate as a cross-reference for every application, but they should be good unless the “Ultra Low ESR” feature is critical. In that case, I’d recommend looking over the alternate options linked here. Unfortunately, there aren’t any with the exact same footprint as the ATC 800A in that second set of options.