4.7 µF, 25 V, 1.5 Ohm ESR — Molded Tantalum for Tight Spots
The TAJB475K025Y: This is a molded tantalum capacitor from the TAJ series, 4.7 µF at 25 V with ±10% tolerance. The 1.5 Ohm ESR is the key loss figure — it limits ripple current and self-heating in a power rail filter, so budget the thermal rise if this sits on a 12 V bus with high-frequency ripple. The 1411 (3528 Metric) case, size code B, measures 3.50 mm x 2.80 mm x 2.10 mm high — a common footprint for board-level bypass and decoupling where board space is tight.
Active Production — No Last-Time-Buy Worry
That covers avionics, satellite, downhole, and under-hood automotive ambient — the full military band. If your board sees 105°C in an engine bay, this cap still has 20°C of margin before the upper limit.