# T491A105K010AT

**KEMET** · Tantalum Capacitors · 1206

T491A105K010AT from KEMET, in a 1206. 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 | 1 | passive | Terminal 1 of an unpolarised capacitor; either orientation. |
| 2 | 2 | passive | Terminal 2 of an unpolarised capacitor; either orientation. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | KEMET |
| Package | 1206 |
| Category | Capacitors |
| Pins | 2 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| DC leakage current (maximum, 5 minutes) | DCL |  |  | 0.5 | µA | at +20°C, Maximum/5 Minutes | 7 |
| Dissipation factor (maximum) | DF |  |  | 4 | % | at +20°C, 120 Hz | 7 |
| Equivalent series resistance (maximum) | ESR |  |  | 10 | Ω | at +20°C, 100 kHz | 7 |
| Maximum allowable ripple current |  |  |  | 87 | mA | at +25°C, 100 kHz | 7 |
| Maximum allowable ripple current |  |  |  | 78 | mA | at +85°C, 100 kHz | 7 |
| Maximum allowable ripple current |  |  |  | 35 | mA | at +125°C, 100 kHz | 7 |
| Capacitance tolerance (K = ±10%) |  | -10 |  | 10 | % |  | 2 |
| Capacitance change vs. +25°C initial limit at −55°C | ΔC/C | -10 |  | 10 | % | Temperature stability, −55°C, IL = initial limit | 3 |
| Capacitance change vs. +25°C initial limit at +85°C | ΔC/C | -10 |  | 10 | % | Temperature stability, +85°C, IL = initial limit | 3 |
| Capacitance change vs. +25°C initial limit at +125°C | ΔC/C | -20 |  | 20 | % | Temperature stability, +125°C, IL = initial limit | 3 |
| Maximum power dissipation | Pmax |  |  | 75 | mW | at 25°C w/+20°C rise, case A 3216-18 | 14 |
| Recommended maximum application voltage |  |  |  | 50 | % of VR | −55°C to 85°C | 14 |
| Recommended maximum application voltage |  |  |  | 33 | % of VR | 85°C to 125°C | 14 |
| Operating temperature range |  | -55 |  | 125 | °C |  | 2 |
| Reflow temperature |  |  |  | 260 | °C | Reflow temperature column, ≤ 260 °C | 7 |
| Rated capacitance |  |  | 1 |  | µF |  | 7 |
| Rated voltage |  |  | 10 |  | VDC | DC, at 85°C | 7 |

## Materials and finish

As the datasheet states them (page.json `metadata.appearance`; the 3D model's colours follow it).

| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts |  | gold | solder systems. Tin/lead (Sn/Pb) terminations are available upon request for any part number. Gold-plated terminations | 1 |

## CAD (KiCad official)

- Symbol: `T491A105K010AT`
- Footprint: `Capacitor_SMD:C_1206_3216Metric`
- 3D model: 1206 (KiCad packages3D, STEP)
- 3D model files: `t491a105k010at-etched.step` / `t491a105k010at-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `t491a105k010at.step` / `t491a105k010at.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/8590163598090797056) (23 pp, sha256 `8f2a3f13dbaa7b4c`, retrieved 2026-10-18, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins`, primary `two-terminal convention` (convention), consensus `off` (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/t491a105k010at-datasheet.pdf)