Using this capacitor under 8 gives you the maximum dissipation factor (%).15uF Farad of capacitance is equivalent to the charge that is deposited on the plates when a voltage of 15uF Volt is applied, and thus the capacitor has a value of 15uF.
TCJB156M020R0150E Features
this capacitor falls under 8
TCJB156M020R0150E Applications
There are a lot of AVX TCJB156M020R0150E applications of tantalum capacitors.