1.0 µF Capacitor 0402 - Walsin 0402X105K250CT

Walsin Technology Corporation 0402X105K250CT: 0402 MLCC, 1.0 µF ±10% X5R, 25 V. An Adom Basic Part: Adom keeps it on reels for its pick-and-place line, so boards built with it draw on Adom stock.

Key specs

Notes for designers

0402X105K250CT is a 0402 X5R capacitor from Walsin's General Purpose series: 1.0 µF ±10%, rated 25 VDC, decoded from the ordering table and confirmed in the X5R range grid. (p.2, p.9) It is a BaTiO3-based Class II ceramic, the approval sheet requires a 150 °C de-aging and 24 h rest before capacitance is even measured, a reminder that the label value is history- and drive-level-dependent. (p.4, p.20) Note the ceiling: X5R is only rated to +85 °C, a tighter limit than the X7R parts sitting next to it in this series. (p.4)

The numbers you design against: capacitance within ±15% from −55 to +85 °C, (p.4, p.14) dissipation factor ≤12.5% at 1 kHz / 1.0 Vrms, (p.12) insulation resistance 10 GΩ or R×C ≥ 100 Ω·F, (p.14) and a dielectric proofed at 250% of rated voltage. (p.13) Life testing runs 1,000 h at 85 °C at rated voltage with capacitance held within ±12.5%. (p.18) It ships 10,000 to a 7-inch paper-tape reel and is MSL 1. (p.11, p.20)

Footprint

The datasheet has no land pattern, so the pads are the IPC-7351 nominal pattern (KiCad's standard Capacitor_SMD:C_0402_1005Metric), replacing pads that were off it by up to 0.12 mm.

Source: IPC-7351 nominal (no land pattern in the datasheet): KiCad 10 Capacitor_SMD:C_0402_1005Metric pads.

Corners: KiCad roundrects with the radius held to 0.25 x the smaller pad side and no more than 0.1 mm (IPC-7351C favours rounded corners for paste release); copper area within 2.47 % of a square-cornered pad.

Chip outline

The part's 3D outline in the standard pose (pad 1 toward the viewer), drawn from the STEP by Adom's OpenCascade service; the part number sits where the laser-etched mark is on the 3D model and reads the same way.

Symbol options

The default symbol, 0402X105K250CT.kicad_sym (the one in the Symbol & Footprint panel), is the plain standard symbol. 0402X105K250CT-outline.kicad_sym is the same symbol with the part's 3D chip outline drawn beside it, its part number placed and reading as on the 3D model.

Ordering

Downloads

Provenance

• Datasheet: MULTILAYER CERAMIC CAPACITORS General Purpose Series (4V to 100V), 0201 to 1812 Sizes, NP0, X7R, X6S, X7S & X5R Dielectrics - Approval Sheet, ASC_General Purpose Series revised Dec. 2023, Walsin Technology Corporation (Passive System Alliance). md5 0306337c43c3c7f2f7e91a237efddd14
• Footprint: IPC-7351 nominal (no land pattern in the datasheet): KiCad 10 Capacitor_SMD:C_0402_1005Metric pads. Pads set to the IPC-7351 nominal pattern on 2026-10-03.
• 3D model and symbol: unchanged by the footprint pass; the etched STEP adds a flat virtual part-number mark (an identification aid, not the maker's marking).

More

• Datasheet pages: the 21 datasheet pages as images.
• Assembly animation: the part dropping onto its pads, and Adom's pick-and-place picking it from tape.