# SMF64A

**Shandong Jingdao Microelectronics** · TVS · SOD-123FL

SMF64A from Shandong Jingdao Microelectronics, 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 of the unidirectional SMF64A TVS diode, which is the pin marked as the cathode in the pinning table; the datasheet gives no separate electrical limit for this pin. |
| 2 | Anode | passive | Anode terminal of the unidirectional SMF64A TVS diode, which is the pin marked as the anode in the pinning table; the datasheet gives no separate electrical limit for this pin. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Shandong Jingdao Microelectronics |
| 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 (min) | VBR | 71.1 |  |  | V | @ IT = 1 mA | 2 |
| Breakdown voltage (max) | VBR |  |  | 78.6 | V | @ IT = 1 mA | 2 |
| Max. clamp voltage | VC |  |  | 103 | V | @ IPP = 1.7 A (10/1000 us waveform) | 2 |
| Reverse leakage current | IR |  |  | 1 | uA | @ VRWM = 64 V | 2 |
| Peak pulse power dissipation | PPPM |  |  | 200 | W | TA=25°C, Note 1,2,5, Fig1 (10/1000 us waveform) | 1 |
| Peak forward surge current (UNI) | IFSM |  |  | 20 | A | 8.3 ms single half sinewave (Note 3) | 1 |
| Steady state power dissipation | PM(AV) |  |  | 1 | W | Note 4 (lead temperature TL) | 1 |
| Operating junction and storage temperature range | TJ,TSTG | -55 |  | 150 | °C |  | 1 |
| Stand-off voltage (reverse working peak voltage) | VRWM |  |  | 64 | V | Note 6: VRWM should be equal to or greater than the DC or continuous peak operating voltage | 2 |
| Typical thermal resistance, junction to ambient | RθJA |  | 180 |  | °C/W |  | 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 | copper |  | 2. Mounted on 5mm copper pads to each terminal | 1 |

## CAD (KiCad official)

- Symbol: `SMF64A`
- Footprint: `Diode_SMD:D_SOD-123F`
- 3D model: SOD-123FL (KiCad packages3D, STEP)
- 3D model files: `smf64a-etched.step` / `smf64a-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `smf64a.step` / `smf64a.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Shandong Jingdao Microelectronics datasheet](docs/smf64a-datasheet.pdf) (4 pp, sha256 `815402489fb37067`, retrieved 2026-10-21, 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/smf64a-datasheet.pdf)