# SMBJ5346B

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

SMBJ5346B 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 by the color band; the zener is reverse-biased here, with VZ of 9.1 V at 150 mA test current for the SMBJ5346B. |
| 2 | A | passive | Anode, the end opposite the color band; it is the lead-formed surface-mount terminal for a 5 W zener diode. |

## Key specifications

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

## CAD (KiCad official)

- Symbol: `SMBJ5346B`
- Footprint: `Diode_SMD:D_SMB`
- 3D model: SMB(DO-214AA) (KiCad packages3D, STEP)
- 3D model files: `smbj5346b-etched.step` / `smbj5346b-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `smbj5346b.step` / `smbj5346b.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/8603144609329795072) (3 pp, sha256 `9441d4af3ecff01f`, 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/smbj5346b-datasheet.pdf)