Part of the Day · CL21A106KAYNNNE — 0805 10µF 25V X5R MLCC

Part of the Day · 2026-11-03

A Samsung Electro-Mechanics 0805 (2012) size 10µF multilayer ceramic capacitor (MLCC). It is widely used as a bulk (smoothing) capacitor on regulator inputs/outputs and power rails. Because it is X5R, be sure to check that the actual capacitance drops sharply when voltage is applied.

Actual size

↓ Actual size, left edge aligned to 0 on the ruler

One ruler tick = 1mm. On PC this is actual size on a 24-inch FHD monitor at 100% zoom; on iPhone it adjusts automatically. For other screens, use “Calibrate ruler” below.

Enlarged (0805 · top view · approx. 20×)

Pins Non-polarized (no marking on the chip)

Package 0805

Key specifications

Values are from the Samsung Electro-Mechanics datasheet.

Marking and pins

Typical uses

• Input/output capacitor for LDO and DC-DC regulators
• Bulk (smoothing) capacitor on board power rails — placed together with 100nF bypass capacitors
• Replacing tantalum/electrolytic capacitors with a smaller part (check after allowing for capacitance loss)

Companion & similar parts

• CL21A106KAYNNNF — Same part, packaging only: embossed tape on 13-inch reel (last letter F)
• CL21A106KAYNNNR — Same part, embossed tape 7-inch horizontally aligned packaging (last letter R — per Samsung Electro-Mechanics: HMC packaging that reduces acoustic noise)
• CL10B104KB8NNN — Samsung Electro-Mechanics CL series 0603 100nF 50V X7R — often used alongside as a bypass capacitor

High-permittivity MLCCs such as X5R lose effective capacitance when DC voltage is applied. The smaller the size, the worse it gets, so check the capacitance at your actual operating voltage on the DC Bias graph of the Samsung Electro-Mechanics product page. Part numbers that differ only in the last letter (packaging code) are the same component. The meaning of each field of the part number is explained in the article on reading MLCC part numbers.