# SDT23C05L02-AT

**Brightking** · ESD And Surge Protection (TVS/ESD) · SOT-23

SDT23C05L02-AT from Brightking, in a SOT-23. 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 | I/O1 | passive | First protected bidirectional I/O line (TVS diode to pin 3 GND); 5V reverse stand-off voltage, 5 µA max leakage at VR=5V, 150 pF max capacitance to GND. |
| 2 | I/O2 | passive | Second protected bidirectional I/O line (TVS diode to pin 3 GND); 5V reverse stand-off voltage, 5 µA max leakage at VR=5V, 150 pF max capacitance to GND. |
| 3 | GND | power_in | Common ground reference for both TVS diodes; the I/O pins are protected against ESD of ±30kV contact and ±30kV air discharge relative to it. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Brightking |
| Package | SOT-23 |
| Category | Circuit Protection |
| Pins | 3 |

## Electrical characteristics

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

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Peak pulse power (tp=8/20μs waveform) | PPP |  |  | 350 | W | tp=8/20μs waveform | 3 |
| ESD voltage (Contact discharge) | VESD | -30 |  | 30 | kV | Contact discharge | 3 |
| ESD voltage (Air discharge) | VESD | -30 |  | 30 | kV | Air discharge | 3 |
| Storage & operating temperature range | TSTG, TJ | -55 |  | 150 | ℃ |  | 3 |
| Reverse stand-off voltage | VRWM |  | 5 |  | V |  | 3 |
| Reverse breakdown voltage | VBR |  | 6 |  | V | IBR=1mA | 3 |
| Reverse leakage current | IR |  | 5 |  | μA | VR=5V, each I/O pin | 3 |
| Clamping voltage (tp=8/20μs) | VC |  | 9.8 |  | V | IPP=1A | 3 |
| Clamping voltage (tp=8/20μs) | VC |  | 18 |  | V | IPP=10A | 3 |
| Peak Pulse Current (tp=8/20μs) | IPP |  | 17 |  | A | tp=8/20μs | 3 |
| Off state junction capacitance | CJ |  | 150 |  | pF | 0Vdc, f=1MHz, between I/O pins and GND | 3 |

## 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 | ● Lead Free/RoHS compliant ● Solder reflow temperature: Pure Tin-Sn, 260~270℃ | 2 |

## CAD (KiCad official)

- Symbol: `SDT23C05L02-AT`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `sdt23c05l02-at-etched.step` / `sdt23c05l02-at-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sdt23c05l02-at.step` / `sdt23c05l02-at.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Brightking datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8756508969260978176) (8 pp, sha256 `6bfc7142b63febb5`, retrieved 2026-10-17, 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/sdt23c05l02-at-datasheet.pdf)