# SOT05LC

**XCH(旭昌辉)** · IC · SOT-23

SOT05LC from XCH(旭昌辉), 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/O 1 | passive | Protected line 1 (steering-diode node, lower in the schematic), for a unidirectional line or one side of a bidirectional pair; working voltage 5V, 60W peak pulse power (8/20μs). |
| 2 | I/O 2 | passive | Protected line 2 (steering-diode node, upper in the schematic), for a unidirectional line or one side of a bidirectional pair; working voltage 5V, 60W peak pulse power (8/20μs). |
| 3 | COMMON | passive | Common node joined to the avalanche TVS diode in the schematic; it serves as the reference/ground return for two unidirectional lines, or as the protected line in single bidirectional use. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | XCH(旭昌辉) |
| Package | SOT-23 |
| Category |  |
| 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 |
|---|---|---|---|---|---|---|---|
| Reverse working voltage (VDRM) | VDRM |  |  | 5 | V |  | 2 |
| Reverse leakage current (IDRM) | IDRM |  |  | 1 | µA |  | 2 |
| Breakdown voltage (VBR) | VBR | 5.8 |  |  | V |  | 2 |
| Reverse current (IR) | IR |  |  | 1 | mA |  | 2 |
| Clamping voltage (Vc) | Vc |  |  | 12 | V | Ipp = 1 A | 2 |
| Clamping voltage (Vc) | Vc |  |  | 20 | V | Ipp = 3 A | 2 |
| Junction capacitance (CO) | CO |  | 0.6 |  | pF |  | 2 |
| Peak pulse power | PPK |  |  | 60 | Watts | tp = 8/20µs | 1 |
| Lead soldering temperature | TL |  |  | 260 | ℃ | 10 sec | 1 |
| Operating temperature | TJ | -55 |  | 125 | ℃ |  | 1 |
| Storage temperature | TSTG | -55 |  | 150 | ℃ |  | 1 |

## CAD (KiCad official)

- Symbol: `SOT05LC`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `sot05lc-etched.step` / `sot05lc-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sot05lc.step` / `sot05lc.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [XCH(旭昌辉) datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603363127467651072) (5 pp, sha256 `03060e6fbd8d698c`, retrieved 2026-10-21, tier: lcsc)
- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/sot05lc-datasheet.pdf)