# SMCJ14A

**YFW** · ESD And Surge Protection (TVS/ESD) · DO-214AB(SMC)

SMCJ14A from YFW, in a DO-214AB(SMC). 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 of the unidirectional SMCJ14A; the datasheet gives a 14 V stand-off (VRWM), a 15.6 V to 17.2 V breakdown range at 1 mA test current, and a 23.2 V maximum clamp voltage at 64.7 A peak pulse current. |
| 2 | Anode | passive | Anode of the unidirectional SMCJ14A; the datasheet limits the maximum instantaneous forward voltage to 3.5 V at 100 A for unidirectional devices and rates the part for 1500 W peak pulse power on a 10/1000 µs waveform. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | YFW |
| Package | DO-214AB(SMC) |
| 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 | VBR | 15.6 |  | 17.2 | V | at test current IT = 1 mA (unidirectional SMCJ14A row) | 2 |
| Max. clamp voltage | VC |  |  | 23.2 | V | at IPP (max. peak pulse current 64.7 A) | 2 |
| Max. peak pulse current | IPP |  |  | 64.7 | A |  | 2 |
| Max. reverse leakage current | IR |  |  | 1 | uA | at VR = 14 V stand-off voltage (VRMW column) | 2 |
| Peak pulse power dissipation | PPPM |  |  | 1500 | W | 10/1000 us waveform | 1 |
| Peak forward surge current (unidirectional) | IFSM |  |  | 200 | A | 8.3 ms single half sine-wave superimposed on rated load, JEDEC method | 1 |
| Power dissipation on infinite heat sink | PD |  |  | 6.5 | W | TA = 50 °C, infinite heat sink | 1 |
| Maximum instantaneous forward voltage (unidirectional only) | VF |  |  | 3.5 | V | at 100 A, unidirectional only | 1 |
| Typical thermal resistance, junction to ambient | RθJA |  | 75 |  | °C/W | Note 1: mounted on 8 mm2 (0.13 mm thick) land areas | 1 |
| Thermal resistance, junction to lead | RθJL |  | 15 |  | °C/W |  | 1 |
| Operating junction and storage temperature range | TJ,TSTG | -65 |  | 150 | °C |  | 1 |

## CAD (KiCad official)

- Symbol: `SMCJ14A`
- Footprint: `Diode_SMD:D_SMC`
- 3D model: DO-214AB(SMC) (KiCad packages3D, STEP)
- 3D model files: `smcj14a-etched.step` / `smcj14a-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `smcj14a.step` / `smcj14a.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [YFW datasheet](docs/smcj14a-datasheet.pdf) (5 pp, sha256 `51d1b221ae680dfb`, 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/smcj14a-datasheet.pdf)