Molded tantalum cap for harsh environments
The TAJR155K006RNJ is a molded tantalum capacitor from the TAJ series, rated at 1.5 µF with ±10% tolerance and a 6.3 V working voltage. The 0805 case size (2.05 mm x 1.30 mm footprint) is a common PCB land pattern, so the layout is straightforward for a rework station or pick-and-place line.
ESR and derating for DC-DC bus caps
With a 2 Ohm ESR at 100 kHz, this capacitor's ripple current capability is limited — it is better suited for decoupling or hold-up duty on a low-ripple rail than for high-frequency output filtering on a switching regulator. Tantalum caps also need derating: keep the applied DC voltage at 50% or less of the rated 6.3 V to avoid surge failures.
