15 µF, 16 V, 1.8 Ohm ESR — bulk decoupling for 12 V rails
The TAJC156K016SNJ: This is a 15 µF molded tantalum capacitor rated at 16 V with a 1.8 Ohm ESR — a common choice for bulk decoupling on 12 V or 5 V power rails where the ESR limits ripple current heating and the voltage rating provides derating margin above the rail. The ±10% tolerance holds the capacitance within a tight window across the batch, which matters when the capacitor sets an RC time constant or a filter pole.
Surface mount 2312 case code C
The 2312 (6032 Metric) case measures 6.00 mm x 3.20 mm with a seated height of 2.80 mm max — the footprint matches the standard EIA-535-BAAC case code C for tantalum chips.