# UMK212B7105KG-T

**TAIYO YUDEN** · Multilayer ceramic chip capacitor (MLCC) · 0805 (2012 metric)

TAIYO YUDEN UMK212B7105KG-T: a 1 µF, 50 V, X7R ceramic chip capacitor in the 0805 (2012 metric) case, ±10 % tolerance. A general-purpose bypass and filter part.

**Note:** Mouser lists this part with "please see suggested alternate MSASU21GSB7105KTNA01" (2026-11-03): TAIYO YUDEN is moving to new part numbers. The old number was still orderable and in stock that day.

## Verification

A person checks each page against its datasheet and signs it off here; the badge turns amber if a checked file changes.

::adom-verified{src="/adom/umk212b7105kg-t/render/verification.json"}

## Key specifications

| Parameter | Value | Source |
|---|---|---|
| Capacitance | 1 µF ±10 % | datasheet p.1 |
| Rated voltage | 50 V | datasheet p.1 |
| Dielectric | X7R | datasheet p.1 |
| Operating temperature | -55 to +125 °C | datasheet p.1 |
| Case size | 0805 (2012 metric) | datasheet p.1 |
| Body L x W x T | 2.0 ±0.10 x 1.25 ±0.10 x 1.25 ±0.10 mm | datasheet p.1 |

## Ordering

| Distributor | Part number | Stock (2026-11-03) | Note |
|---|---|---|---|
| Mouser | [963-UMK212B7105KG-T](https://www.mouser.com/en/ProductDetail/TAIYO-YUDEN/UMK212B7105KG-T?qs=PzICbMaShUdi76GLXMVYcA%3D%3D) | 450,589 | lead time 126 Days, $0.20 each |
| DigiKey | [587-2910-2-ND](https://www.digikey.com/en/products/detail/taiyo-yuden/UMK212B7105KG-T/2648987) | | number from a DigiKey lookup on 2026-11-03 |
| LCSC / JLCPCB | not looked up | | |

## CAD

| File | What it is |
|---|---|
| `umk212b7105kg-t.kicad_sym` | KiCad symbol from KiCad's `Device:C`, with MPN, manufacturer, Mouser and DigiKey numbers as properties |
| `umk212b7105kg-t.kicad_mod` | KiCad footprint: KiCad's `Capacitor_SMD:C_0805_2012Metric` |
| `umk212b7105kg-t.step` / `umk212b7105kg-t.glb` | 3D model, Z-up, seated on z = 0: KiCad packages3D C_0805_2012Metric.step (KiCad 10.0.4 library on noah-asus), unmodified |
| `umk212b7105kg-t.lbr` | Fusion 360 / EAGLE library: one deviceset with MPN, MANUFACTURER, MOUSER_PN and DIGIKEY_PN attributes |
| `altium/Adom_umk212b7105kg_t.SchLib` / `.PcbLib` | Altium library pair (adom-lbr, no Altium needed), parameters carry the part numbers; `altium/*.adom-lbr.json` is the hub it was built from |
| `provenance/files.json` | Every file on this page: source, retrieval date, SHA-256, authoring class and generator |

## Provenance

- **Datasheet:** [docs/umk212b7105kg-t-datasheet.pdf](docs/umk212b7105kg-t-datasheet.pdf) (TAIYO YUDEN part specification sheet, 2022.05.31), from [mm.digikey.com](https://mm.digikey.com/Volume0/opasdata/d220001/medias/docus/4819/UMK212B7105KG-T_SS.pdf), retrieved 2026-11-03.
- **Specs:** each row names its datasheet page.
- **Mouser number and stock:** looked up 2026-11-03 with adom-mouser; DigiKey number with adom-digikey; exact part number and manufacturer.
- **Footprint:** KiCad 10.0.4 library `Capacitor_SMD:C_0805_2012Metric`, unmodified apart from its name.
- **3D:** KiCad packages3D C_0805_2012Metric.step (KiCad 10.0.4 library on noah-asus), unmodified.

## Related

- First used on the [AM32 ESC Molecule v1](https://wiki.adom.inc/adom/am32-esc-v1) (private project page).