# SD15

**MDD Microdiode Semiconductor** · ESD And Surge Protection (TVS/ESD) · SOD-323

SD15 from MDD Microdiode Semiconductor, 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 | K | passive | Cathode of the unidirectional TVS diode, connected to the protected I/O line (VRWM 15V max, breakdown VB 16.7V min at 1mA for SD15). |
| 2 | A | passive | Anode of the unidirectional TVS diode, connected to ground/return (ESD rated ±30kV air and contact per IEC 61000-4-2). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | MDD Microdiode Semiconductor |
| 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 |
|---|---|---|---|---|---|---|---|
| Working peak reverse voltage (VRWM), max | VRWM |  |  | 15 | V |  | 2 |
| Breakdown voltage (VB), min | VB | 16.7 |  |  | V | IT = 1 mA | 2 |
| Capacitance (CT), max | CT |  |  | 120 | pF |  | 2 |
| Peak pulse power | PPP |  |  | 350 | W | tp=8/20µs waveform | 1 |
| ESD per IEC 61000-4-2 (Air) | VESD | -30 |  | 30 | V | IEC 61000-4-2 (Air) | 1 |
| ESD per IEC 61000-4-2 (Contact) | VESD | -30 |  | 30 | V | IEC 61000-4-2 (Contact) | 1 |
| Operating temperature | TOPT | -55 |  | 150 | °C |  | 1 |
| Storage temperature | TSTG | -55 |  | 150 | °C |  | 1 |
| Lead solder temperature, maximum | TL |  |  | 260 | °C | 10 s duration | 1 |

## 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 |  Terminal: Matte tin plated. http://www.microdiode.com Page :2 | 1 |

## CAD (KiCad official)

- Symbol: `SD15`
- Footprint: `Diode_SMD:D_SOD-323`
- 3D model: SOD-323 (KiCad packages3D, STEP)
- 3D model files: `sd15-etched.step` / `sd15-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sd15.step` / `sd15.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [MDD Microdiode Semiconductor datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8565978322305257472) (4 pp, sha256 `10c3d65b4326cef2`, retrieved 2026-10-23, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-opus-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/sd15-datasheet.pdf)