If you really need to be on the lowest column (highest capacitance) for a given voltage rating, you'll either pay for it in voltage derating, temperature performance, tolerance accuracy, package height, or just pay for it in literal cash.
You cannot go below the lowest column, they have not figured out how to build a 10uF/25V/X7R/0603 MLCC, that is just not a thing you can buy.
With a given dielectric, material properties science only go so far. You're leaving performance on the table if you select a given package size with less capacitance and a lower voltage rating than what's available. (Assuming decoupling, not analog stuff where you need exactly 438.6 pF for a particular resonant frequency or something). Each package size has basically a constant inductance, and usually, capacitor height isn't that critical - you don't want to be oversquare, but they don't sell many of those. Each manufacturer publishes a waterfall diagram, but all manufacturers are working with the same physics.
Conversely, if you've selected an X7R dielectric and an 0603 package for a decoupling capacitor, there's not a great reason to go with a 0.1uF value, or to restrict yourself to 6.3V rating - eg [2]. They make a 0.47 uF 25V capacitor that's otherwise identical! [3] And because designers are lazy and default to 100nF, the part with 1/5th the performance is literally 6% more expensive!
Note that for 0402 packages, the 100nF capacitor is typically the right part to select! You can't get a 120nF/X7R/0402 at any voltage rating above 6.3V, the 220nF and 470nF are exotic parts that sacrifice stability and accuracy for maximum capacitance in a volume, but a 100nF/16V/X7R/0402 is a pretty good default.
Screenshot: https://i.imgur.com/sMaXBpN.png
If you really need to be on the lowest column (highest capacitance) for a given voltage rating, you'll either pay for it in voltage derating, temperature performance, tolerance accuracy, package height, or just pay for it in literal cash.
You cannot go below the lowest column, they have not figured out how to build a 10uF/25V/X7R/0603 MLCC, that is just not a thing you can buy.
With a given dielectric, material properties science only go so far. You're leaving performance on the table if you select a given package size with less capacitance and a lower voltage rating than what's available. (Assuming decoupling, not analog stuff where you need exactly 438.6 pF for a particular resonant frequency or something). Each package size has basically a constant inductance, and usually, capacitor height isn't that critical - you don't want to be oversquare, but they don't sell many of those. Each manufacturer publishes a waterfall diagram, but all manufacturers are working with the same physics.
Conversely, if you've selected an X7R dielectric and an 0603 package for a decoupling capacitor, there's not a great reason to go with a 0.1uF value, or to restrict yourself to 6.3V rating - eg [2]. They make a 0.47 uF 25V capacitor that's otherwise identical! [3] And because designers are lazy and default to 100nF, the part with 1/5th the performance is literally 6% more expensive!
Note that for 0402 packages, the 100nF capacitor is typically the right part to select! You can't get a 120nF/X7R/0402 at any voltage rating above 6.3V, the 220nF and 470nF are exotic parts that sacrifice stability and accuracy for maximum capacitance in a volume, but a 100nF/16V/X7R/0402 is a pretty good default.
[1] https://content.kemet.com/datasheets/KEM_C1002_X7R_SMD.pdf
[2] https://www.digikey.com/en/products/detail/kemet/C0603C104K9...
[3] https://www.digikey.com/en/products/detail/kemet/C0603C474K4...