# BS05L

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

BS05L from BORN, 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 | 1 | passive | Protected line connection of the unidirectional ESD diode (rated 5.0V reverse stand-off, 6.0V min breakdown at 1mA, 17V clamp at 22A 8/20μs). |
| 2 | 2 | passive | Connected to ground, or to a second line for differential protection, per the application information. |
| 3 | NC | unconnected | Not connected internally per the application information. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | BORN |
| 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 | PPP |  |  | 350 | Watts | tp =8/20μs | 2 |
| Peak Pulse Current | Ipp |  |  | 22 | A | tp =8/20μs (note1) | 2 |
| ESD per IEC 61000-4-2 (Air) | VESD |  |  | 15 | kV |  | 2 |
| ESD per IEC 61000-4-2 (Contact) | VESD |  |  | 8 | kV |  | 2 |
| Lead Soldering Temperature | TL |  |  | 260 | ℃ | 10 seconds | 2 |
| Junction Temperature | TJ | -55 |  | 125 | ℃ |  | 2 |
| Storage Temperature | Tstg | -55 |  | 125 | ℃ |  | 2 |
| Reverse Stand-Off Voltage | VRWM |  |  | 5 | V |  | 2 |
| Reverse Breakdown Voltage | VBR | 6 |  |  | V | IT=1mA | 2 |
| Reverse Leakage Current | IR |  | 0.1 | 0.5 | μA | VRWM=5V,T=25℃ | 2 |
| Peak Pulse Current | IPP |  |  | 22 | A | tp =8/20μs | 2 |
| Clamping Voltage | VC |  |  | 17 | V | IPP=22A,tp=8/20μs | 2 |
| Junction Capacitance | Cj |  |  | 0.5 | pF | VR = 0V, f = 1MHz | 2 |

## CAD (KiCad official)

- Symbol: `BS05L`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `bs05l-etched.step` / `bs05l-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bs05l.step` / `bs05l.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [BORN datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588912936059985920) (5 pp, sha256 `01ecd9abd7f7ba64`, retrieved 2026-10-19, 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/bs05l-datasheet.pdf)