The TAJT106K004RNJ: No successor or second-source is listed — the part is the current standard offering from KYOCERA AVX.
10 µF, 4 V, 5 Ohm ESR — the bench-fit check
10 µF at 4 V with ±10% tolerance — this is a low-voltage bulk decoupling cap for 3.3 V or 2.5 V rails. The 5 Ohm ESR is on the higher side for a tantalum of this value; expect about 200 mA ripple current capability at 85°C. If your rail demands lower ESR for transient response, you'll want to parallel a ceramic cap or step up to a low-ESR tantalum series. This cap will hold its spec in an engine bay, avionics bay, or downhole tool where the ambient hits 105°C and the self-heating from ripple stays under the 125°C ceiling.
Package and footprint — surface-mount layout
Molded case in 1411 (3528 Metric) / 1210 footprint, size code T. The body measures 3.50 mm x 2.80 mm with a seated height of 1.20 mm max. Standard reflow profile for tantalum caps — no special soak requirements, but a slow ramp-down helps avoid solder-joint stress on the molded body.