CL21B105KBFNNNE is a 1 µF X7R in 0805 with a full 50 V rating^p.1 — the general-purpose bypass and filter capacitor for rails where a 16 V or 25 V part would leave no headroom. Tolerance is ±10%, and the X7R dielectric holds capacitance within ±15% across the whole −55 to +125 °C span.^{p.1, p.2}

The reliability table gives the rest of the design numbers: dissipation factor 0.1 max at 1 kHz / 1.0 Vrms, insulation resistance of 10,000 MΩ or 100 MΩ·µF (whichever is smaller), and a withstanding-voltage proof at 250% of rated. The life test runs 1,000 h at 150% of rated voltage at the maximum operating temperature.^p.2 Reflow is rated at a 260±5 °C peak for 30 s.^p.2

Two Class II realities still apply. Capacitance moves with applied DC bias, so check the bias curve at your working voltage instead of trusting the label.^p.14 And mechanical strain is a spec, not a footnote: the bending test allows up to ±10% capacitance change at 1 mm of board flex.^p.2 It ships 2,000 to a 7-inch reel on 4 mm-pitch embossed tape.^p.4