100 µF at 10 V — the bulk decoupling fit
That 100 µF at 10 V is a common bulk decoupling value for 3.3 V and 5 V rails, providing enough charge reservoir to handle transient load steps without excessive voltage droop.
The molded case and standard 2917 footprint (7.30 mm x 4.30 mm, 3.10 mm seated height) are widely second-sourced across the tantalum capacitor industry, which reduces single-source risk if the BOM requires an alternate supplier.
The 125°C upper limit is the component temperature, not just ambient — derate the voltage above 85°C per the TAJ series application guidelines.