# SFD52A05L01

**UMW** · Electrostatic And Surge Protection (TVS/ESD) · SOD-523

SFD52A05L01 from UMW, in a SOD-523. 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 | Pin1 | passive | TVS diode terminal 1 of the single-line protection device (protects one I/O line, working voltage 5V for SFD52A05L01); the datasheet does not state polarity. |
| 2 | Pin2 | passive | TVS diode terminal 2 of the single-line protection device (protects one I/O line, working voltage 5V for SFD52A05L01); the datasheet does not state polarity. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | UMW |
| Package | SOD-523 |
| Category | TVS/Fuse/Board Level 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 |  |  | 5 | V |  | 3 |
| Reverse breakdown voltage | VBR | 6 |  |  | V | IBR=1mA | 3 |
| Reverse leakage current | IR |  |  | 1 | µA | VR=5V | 3 |
| Clamping voltage (tp=8/20μs) | VC |  |  | 9.8 | V | IPP=1A | 3 |
| Clamping voltage (tp=8/20μs) | VC |  |  | 25 | V | IPP=18A | 3 |
| Peak pulse current (tp=8/20μs) | IPP |  |  | 18 | A |  | 3 |
| Off state junction capacitance | CJ |  |  | 200 | pF | 0Vdc, f=1MHz | 3 |
| ESD voltage (Contact discharge) | VESD | -30 |  | 30 | kV |  | 2 |
| ESD voltage (Air discharge) | VESD | -30 |  | 30 | kV |  | 2 |
| Storage & Junction temperature range | TSTG, TJ | -55 |  | 150 | °C |  | 2 |

## CAD (KiCad official)

- Symbol: `SFD52A05L01`
- Footprint: `Diode_SMD:D_SOD-523`
- 3D model: SOD-523 (KiCad packages3D, STEP)
- 3D model files: `sfd52a05l01-etched.step` / `sfd52a05l01-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sfd52a05l01.step` / `sfd52a05l01.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [UMW datasheet](docs/sfd52a05l01-datasheet.pdf) (8 pp, sha256 `6376325e9b59f6b6`, 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/sfd52a05l01-datasheet.pdf)