# SMBJ5344B

**LGE** · Zener Diodes · SMB(DO-214AA)

SMBJ5344B from LGE, in a SMB(DO-214AA). 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 end marked with the color band; the Zener is reverse biased with this pin positive, VZ 8.2 V nominal at IZT 150 mA for the SMBJ5344 type. |
| 2 | A | passive | Anode, the end opposite the color band; 5 W maximum power dissipation at TL = 25 °C and VF 1.2 V maximum at IF = 1.0 A. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | LGE |
| Package | SMB(DO-214AA) |
| Category | Diodes |
| Pins | 2 |

## CAD (KiCad official)

- Symbol: `SMBJ5344B`
- Footprint: `Diode_SMD:D_SMB`
- 3D model: SMB(DO-214AA) (KiCad packages3D, STEP)
- 3D model files: `smbj5344b-etched.step` / `smbj5344b-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `smbj5344b.step` / `smbj5344b.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [LGE datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590207646864478208) (3 pp, sha256 `4bc961eb60e82dea`, retrieved 2026-10-13, 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/smbj5344b-datasheet.pdf)