# DF2S5.1FS

**TOSHIBA** · ESD And Surge Protection (TVS/ESD) · SOD-923

DF2S5.1FS from TOSHIBA, in a SOD-923. 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 | Cathode | passive | Cathode terminal of the ESD protection diode; the datasheet guarantees ±30 kV IEC61000-4-2 contact ESD protection and a working peak reverse voltage VRWM of 1.5 V max. |
| 2 | Anode | passive | Anode terminal of the ESD protection diode, paired with pin 1 (Cathode) as the protected line return; the device is intended for ESD protection only and not for voltage regulation. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | TOSHIBA |
| Package | SOD-923 |
| 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 |  |  | 1.5 | V |  | 2 |
| Zener voltage (Reverse breakdown voltage) | VZ | 4.8 | 5.1 | 5.4 | V | IZ = 5 mA | 2 |
| Dynamic impedance | ZZ |  |  | 70 | Ω | IZ = 5 mA | 2 |
| Reverse current | IR |  |  | 1 | µA | VRWM = 1.5 V | 2 |
| Electrostatic discharge voltage (IEC61000-4-2)(Contact) | VESD | -30 |  | 30 | kV | IEC61000-4-2 (Contact) | 2 |
| Junction temperature | Tj |  |  | 150 |  |  | 2 |
| Storage temperature | Tstg | -55 |  | 150 |  |  | 2 |

## CAD (KiCad official)

- Symbol: `DF2S5.1FS`
- Footprint: `Diode_SMD:D_SOD-923`
- 3D model: SOD-923 (KiCad packages3D, STEP)
- 3D model files: `df2s5-1fs-etched.step` / `df2s5-1fs-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `df2s5-1fs.step` / `df2s5-1fs.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [TOSHIBA datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588924570690859008) (9 pp, sha256 `b21e24cae2eff214`, retrieved 2026-10-16, 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/df2s5-1fs-datasheet.pdf)