6.8 µF, 20 V, 2 Ohm ESR – what these ratings mean for your rail
The TAJC685M020H: The 6.8 µF capacitance at 20 V rated voltage is a common decoupling value for 12 V or 5 V supply rails where the DC bias derating of MLCCs would drop effective capacitance below the target – a tantalum holds its full value across the voltage range. For a 20 V rail with 50 mV ripple, the ripple current is 25 mA – well within the part's capability, but a lower-ESR part would run cooler if ripple is higher.
If you need a drop-in functional equivalent from another manufacturer, the same 2312 case size, 6.8 µF, 20 V, ±20% tolerance, and 2 Ohm ESR spec covers most cross-reference candidates – confirm the ESR and temperature range match your BOM.
Molded case, 2312 footprint, -55 to 125°C
Molded construction in a 2312 (6032 Metric) case – 6.00 mm x 3.20 mm footprint, 2.80 mm seated height. The molded body gives consistent dimensions for pick-and-place and provides better moisture resistance than uncoated chips. Rated -55°C to 125°C – full military temperature range. This covers avionics, downhole, and engine-bay environments where the board sees temperature extremes. The capacitance tolerance is ±20% – budget the full spread in your derating analysis.