CL21B104KBCNFNC is Samsung's 0805 take on the most ordinary value in electronics: 100 nF, X7R, rated 50 V.^p.1 Two things set it apart from a generic 0805 0.1 µF. The body is the thin 0.85 mm C-thickness rather than the usual full-height brick, and position 9 of the part number is an F — Samsung's Product for POWER application build.^p.1

The numbers you design against: ±10% initial tolerance, and X7R holds capacitance within ±15% from −55 to +125 °C.^{p.1, p.2} Dissipation factor is specified at 0.025 max — four times tighter than the 0.1 limit on the high-capacitance X5R parts in this family — and insulation resistance is 10,000 MΩ or 500 MΩ·µF, whichever is smaller. The dielectric is proofed at 250% of rated voltage, and the high-temperature life test runs 1,000 h at 200% of rated voltage.^p.2

It is still a Class II ceramic, so capacitance moves with applied DC and AC voltage — the product manual tells you to check the bias characteristic in-circuit rather than trust the label value.^p.14 Reflow is rated to a 260 +0/−5 °C peak for no more than 10 s,^p.2 and it ships on 4 mm-pitch cardboard tape, 4,000 to a 7-inch reel.^p.4