The TAJC225K050SNJ is a molded tantalum capacitor from the TAJ series, 2.2 µF rated at 50 V with ±10% tolerance. It comes in the C-size case (2312 metric / 6032 metric), measuring 6.00 mm x 3.20 mm with a seated height of 2.80 mm. This is a general-purpose surface-mount part, and the molded construction gives it a consistent outline for pick-and-place assembly.
Temperature rating and lifetime in practice
That 2000-hour figure at the top end means continuous operation at 125°C ambient will de-rate the service life — for a power supply rail running at 85°C or lower, the capacitor will last much longer than the 2000-hour mark. If your circuit sees sustained 125°C, plan for periodic replacement or consider a higher-temperature-rated part.
ESR is specified at 2.5 Ohm at 100 kHz. In a 50 V rail with moderate ripple, the 2.5 Ohm ESR is acceptable for decoupling and bulk storage, but if you're filtering high-frequency switching noise, a ceramic or polymer capacitor would offer lower ESR. The ESR also affects the capacitor's ability to handle surge current; tantalums are inherently surge-sensitive, so keep the inrush limited.
Lifecycle and sourcing status
That means it's still in the manufacturer's catalog and available for new designs.