The TAJB475K025H is a 4.7 µF molded tantalum capacitor rated at 25 V with ±10 % tolerance and a 1.5 Ohm ESR. The 25 V rating gives 8× derating over a typical 3.3 V rail — the capacitor stays well inside its voltage derating curve, which is the standard practice for tantalum reliability in power-supply decoupling and hold-up circuits. The 1.5 Ohm ESR at 25 °C sets the ripple current capability.
Package fit and board-level considerations
Size code B lands on a 1411 (3528 Metric) footprint — 3.50 mm × 2.80 mm, seated height 2.10 mm max. The molded case is surface-mount, supplied on tape and reel.