# T491B226M006AT

**KEMET** · Tantalum Capacitors · CASE-B-3528-21(mm)

T491B226M006AT from KEMET, in a CASE-B-3528-21(mm). Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | ANODE (+) | passive | Positive polar terminal, identified on the case by the polarity stripe and beveled edge, and must not be connected with reversed polarity because the capacitor may be permanently damaged or destroyed. |
| 2 | CATHODE (-) | passive | Negative polar terminal (leadframe marked −Cathode), which may see only the transient reverse voltage permitted by the datasheet (15% of rated voltage at 25°C, 5% at 85°C, 1% at 125°C) and must not be operated continuously in reverse. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | KEMET |
| Package | CASE-B-3528-21(mm) |
| Category | Capacitors |
| Pins | 2 |

## Electrical characteristics

Limits from the LCSC catalog entry for this part (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Capacitance |  |  | 22 |  | µF | nominal, catalog attribute (LCSC C600508) | catalog |
| Tolerance |  | -20 |  | 20 | % | catalog attribute (LCSC C600508) | catalog |
| Operating temperature |  | -55 |  | 125 | °C | catalog description (LCSC C600508) | catalog |

## CAD (KiCad official)

- Symbol: `T491B226M006AT`
- Footprint: `Capacitor_Tantalum_SMD:CP_EIA-3528-21_Kemet-B`
- 3D model: CASE-B-3528-21(mm) (KiCad packages3D, STEP)
- 3D model files: `t491b226m006at-etched.step` / `t491b226m006at-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `t491b226m006at.step` / `t491b226m006at.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [KEMET datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588931293803790336) (23 pp, sha256 `271b6cea80c8b55f`, retrieved 2026-10-14, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/t491b226m006at-datasheet.pdf)