# KSMF18CA-E3-08

**KUU** · TVS · SOD-123FL

KSMF18CA-E3-08 from KUU, 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 | Cathode | passive | Cathode terminal as printed in the PINNING table for the SOD-123FL outline (PIN 1 = Cathode); the datasheet gives no separate pin-level electrical limit for this terminal. |
| 2 | Anode | passive | Anode terminal as printed in the PINNING table for the SOD-123FL outline (PIN 2 = Anode); the datasheet gives no separate pin-level electrical limit for this terminal. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | KUU |
| 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 |
|---|---|---|---|---|---|---|---|
| Peak Pulse Power Dissipation | PPPM |  |  | 200 | W | TA=25°C, 10/1000 us waveform (Notes 1,2,5, Fig 1) | 1 |
| Steady State Power Dissipation | PM(AV) |  |  | 1 | W | Note 4, TL=75°C | 1 |
| Operating Junction and Storage Temperature Range | TJ,TSTG | -55 |  | 150 | °C |  | 1 |
| Typical Thermal Resistance, junction to ambient | RθJA |  | 180 |  | °C/W |  | 1 |
| Breakdown Voltage (min) | VBR | 20 |  |  | V | IT=1 mA | 2 |
| Breakdown Voltage (max) | VBR |  |  | 22.1 | V | IT=1 mA | 2 |
| Reverse Leakage Current | IR |  |  | 1 | μA | @ VRWM=18 V | 2 |
| Max Clamp Voltage | VC |  |  | 29.2 | V | @ IPP=6.8 A | 2 |
| Peak Pulse Current | IPP |  |  | 6.8 | A | 10/1000 us waveform (Note 1, Table 1) | 2 |
| Reverse Stand-Off Voltage | VRWM |  | 18 |  | V | Note 6: VRWM should be equal to or greater than the DC or continuous peak operating voltage | 2 |

## 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 | copper |  | 2. Mounted on 5mm copper pads to each terminal | 1 |

## CAD (KiCad official)

- Symbol: `KSMF18CA-E3-08`
- Footprint: `Diode_SMD:D_SOD-123F`
- 3D model: SOD-123FL (KiCad packages3D, STEP)
- 3D model files: `ksmf18ca-e3-08-etched.step` / `ksmf18ca-e3-08-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ksmf18ca-e3-08.step` / `ksmf18ca-e3-08.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [KUU datasheet](docs/ksmf18ca-e3-08-datasheet.pdf) (4 pp, sha256 `601ec5d506c70536`, retrieved 2026-10-30, 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/ksmf18ca-e3-08-datasheet.pdf)