# LM-MSMF05LC

**Leiditech** · ESD Protection Devices · SOT-553

LM-MSMF05LC from Leiditech, in a SOT-553. 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 | IO1 | passive | Protected line 1 connected through a steering diode to the common center node; the datasheet gives VRWM 5V, 0.7pF max capacitance and ±15kV air / ±8kV contact ESD ratings. |
| 2 | GND | power_in | Common center node of the diode array shown on the pin configuration, which is the reference/ground connection for the protected lines. |
| 3 | IO2 | passive | Protected line 2 connected through a steering diode to the common center node; the datasheet gives VRWM 5V, 0.7pF max capacitance and ±15kV air / ±8kV contact ESD ratings. |
| 4 | IO3 | passive | Protected line 3 connected through a steering diode to the common center node; the datasheet gives VRWM 5V, 0.7pF max capacitance and ±15kV air / ±8kV contact ESD ratings. |
| 5 | IO4 | passive | Protected line 4 connected through a steering diode to the common center node; the datasheet gives VRWM 5V, 0.7pF max capacitance and ±15kV air / ±8kV contact ESD ratings. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Leiditech |
| Package | SOT-553 |
| Category | TVS/Fuse/Board Level Protection |
| Pins | 5 |

## 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 | VRWM |  |  | 5 | V |  | 2 |
| Breakdown voltage | VBR | 6 |  |  | V | IT = 1 mA | 2 |
| Clamping voltage | VC |  | 9.8 |  | V | @1A | 2 |
| Clamping voltage | Vc |  |  | 12 | V | @5A | 2 |
| Reverse leakage current | IR |  |  | 0.5 | µA |  | 2 |
| Peak pulse power | Ppp |  |  | 60 | W | 8/20µs | 1 |
| ESD air discharge | VESD | -15 |  | 15 | kV | IEC 61000-4-2 Air | 1 |
| ESD contact discharge | VESD | -8 |  | 8 | kV | IEC 61000-4-2 Contact | 1 |
| Operating temperature range | TJ | -55 |  | 125 | °C |  | 1 |
| Storage temperature range | TSTJ | -55 |  | 150 | °C |  | 1 |
| Test current | IT |  | 1 |  | mA |  | 2 |
| Capacitance | C |  | 0.7 |  | pF |  | 2 |

## CAD (KiCad official)

- Symbol: `LM-MSMF05LC`
- Footprint: `Package_TO_SOT_SMD:SOT-553`
- 3D model: SOT-553 (KiCad packages3D, STEP)
- 3D model files: `lm-msmf05lc-etched.step` / `lm-msmf05lc-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lm-msmf05lc.step` / `lm-msmf05lc.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Leiditech datasheet](docs/lm-msmf05lc-datasheet.pdf) (3 pp, sha256 `2628e75e7a1aed19`, retrieved 2026-10-22, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-opus-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/lm-msmf05lc-datasheet.pdf)