# SODJ18A-SH

**LRC** · ESD And Surge Protection (TVS/ESD) · SOD-123FL

SODJ18A-SH from LRC, in a SOD-123FL. 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 | K | passive | Cathode terminal of the unidirectional TVS, marked by the cathode band, connected to the protected I/O line (VRWM 18 V, VBR 20 V min to 22.1 V max at 1 mA, VC 29.2 V max). |
| 2 | A | passive | Anode terminal of the unidirectional TVS, on the side without the cathode band, normally connected to ground (200 W peak pulse power at 10/1000 µs). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | LRC |
| Package | SOD-123FL |
| 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 |
|---|---|---|---|---|---|---|---|
| Reverse Stand-Off Voltage | VRWM |  | 18 |  | V |  | 2 |
| Breakdown Voltage | VBR | 20 |  | 22.1 | V | @IT = 1 mA | 2 |
| Maximum Clamping Voltage | VC |  |  | 29.2 | V | @IPP = 6.8 A | 2 |
| Maximum Reverse Leakage Current | IR |  |  | 1 | uA | @VRWM | 2 |
| Peak Pulse Current | IPPM |  |  | 6.8 | A |  | 2 |
| Peak Power Dissipation | PPPM | 200 |  |  | Watts | TA=25°C, TP=1ms (Note 1) | 1 |
| Steady State Power Dissipation | PM(AV) |  |  | 0.5 | Watts | TL=75°C (Note 2) | 1 |
| Peak Forward Surge Current | IFSM |  |  | 20 | Amps | 8.3ms single half sine-wave, unidirectional only (Note 3) | 1 |
| Operating Temperature Range | TJ | -55 |  | 150 | °C |  | 1 |
| Storage Temperature Range | TSTG | -55 |  | 150 | °C |  | 1 |

## CAD (KiCad official)

- Symbol: `SODJ18A-SH`
- Footprint: `Diode_SMD:D_SOD-123F`
- 3D model: SOD-123FL (KiCad packages3D, STEP)
- 3D model files: `sodj18a-sh-etched.step` / `sodj18a-sh-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sodj18a-sh.step` / `sodj18a-sh.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [LRC datasheet](docs/sodj18a-sh-datasheet.pdf) (10 pp, sha256 `5be2d95bdfcdb9e2`, 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/sodj18a-sh-datasheet.pdf)