# SD12C.TCT

**SEMTECH** · ESD And Surge Protection (TVS/ESD) · SOD-323

SD12C.TCT from SEMTECH, in a SOD-323. 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 | Bidirectional TVS terminal for the protected line (SD12C: 12V reverse stand-off); device is symmetrical with no cathode band, so pins 1 and 2 are interchangeable. |
| 2 | 2 | passive | Bidirectional TVS terminal, connected to ground or the other side of the protected line (SD12C: 12V reverse stand-off); device is symmetrical with no cathode band. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | SEMTECH |
| Package | SOD-323 |
| Category | Circuit Protection |
| 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 |
|---|---|---|---|---|---|---|---|
| Reverse Stand-Off Voltage | VRWM |  |  | 12 | V |  | 2 |
| Reverse Leakage Current | IR |  |  | 1 | µA | VRWM = 12V, T=25°C | 2 |
| Clamping Voltage | VC |  |  | 24 | V | IPP = 15A, tp = 8/20µs | 2 |
| Peak Pulse Current | IPP |  |  | 15 | A | tp = 8/20µs | 2 |
| Operating Temperature | TJ | -55 |  | 125 | °C |  | 2 |
| Storage Temperature | TSTG | -55 |  | 150 | °C |  | 2 |

## 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 |  | tin | Matte Tin Lead Finish Matte tin has become the industry standard lead-free | 5 |

## CAD (KiCad official)

- Symbol: `SD12C.TCT`
- Footprint: `Diode_SMD:D_SOD-323`
- 3D model: SOD-323 (KiCad packages3D, STEP)
- 3D model files: `sd12c-tct-etched.step` / `sd12c-tct-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sd12c-tct.step` / `sd12c-tct.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [SEMTECH datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588880533287260161) (7 pp, sha256 `c82469f94be4b3b7`, retrieved 2026-10-22, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-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/sd12c-tct-datasheet.pdf)