Capacitance, voltage, and ESR for the BOM line
The TAJC687M002RNJ: This is a 680 µF tantalum capacitor rated at 2.5 V, with ±20% tolerance — the capacitance value is the headline number for bulk decoupling or hold-up energy storage on a low-voltage rail.
No direct equivalent or replacement is documented — the TAJ series is the standard molded tantalum line from AVX.
