# SM4F5.0CA

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

SM4F5.0CA from hongjiacheng, 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: the banded/marked end per the datasheet; pad 1 of the KiCad diode footprint. |
| 2 | A | passive | Anode. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | hongjiacheng |
| 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 |
|---|---|---|---|---|---|---|---|
| Breakdown voltage (minimum) | VBR | 6.4 |  |  | V | @ IT 10 mA | 2 |
| Breakdown voltage (maximum) | VBR |  |  | 7 | V | @ IT 10 mA | 2 |
| Maximum clamping voltage | VC |  |  | 9.2 | V | @ IPP 43.5 A | 2 |
| Reverse leakage | IR |  |  | 800 | µA | @ VRWM | 2 |
| Peak pulse power dissipation | PPPM |  |  | 400 | W | 10/1000µs waveform (Note 1) | 1 |
| Peak pulse current | IPP |  |  | 43.5 | A | 10/1000µs waveform (Note 1); value for SM4F5.0CA from table on page 2 | 1 |
| Power dissipation on infinite heat sink | PM(AV) |  |  | 3 | W | TL=75°C | 1 |
| Operating junction and storage temperature range | TJ, TSTG | -55 |  | 150 | ℃ |  | 1 |
| Maximum temperature coefficient of VBR | ΔVBR |  |  | 0.1 | % of VBR@25℃ per ℃ | ΔVBR = 0.1% ×VBR@25℃ ×ΔT (typical maximum) | 1 |
| Typical thermal resistance junction to lead | RθJ-L |  | 40 |  | ℃/W | junction to lead | 1 |
| Typical thermal resistance junction to ambient | RθJ-A |  | 180 |  | ℃/W | junction to ambient | 1 |

## 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 | •Matte tin lead-free Plated •Halogen free and RoHS compliant | 1 |

## CAD (KiCad official)

- Symbol: `SM4F5.0CA`
- Footprint: `Diode_SMD:D_SOD-123F`
- 3D model: SOD-123FL (KiCad packages3D, STEP)
- 3D model files: `sm4f5-0ca-etched.step` / `sm4f5-0ca-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sm4f5-0ca.step` / `sm4f5-0ca.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [hongjiacheng datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8564879673626169344) (5 pp, sha256 `87ca5cc5913a5f70`, retrieved 2026-10-17, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins`, primary `cathode-band convention` (convention), consensus `off` (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/sm4f5-0ca-datasheet.pdf)