# BZT52B11

**LGE** · Zener Diodes · SOD-123

BZT52B11 from LGE, in a SOD-123. 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 band on the SOD-123 drawing; it takes the positive voltage in Zener (reverse) operation, with a nominal VZ of 11 V (10.8 to 11.2 V) at IZT = 5 mA for BZT52B11. |
| 2 | A | passive | Anode, the unbanded end of the SOD-123 package; forward voltage is 0.9 V at IF = 10 mA and power dissipation is 500 mW. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | LGE |
| Package | SOD-123 |
| Category | Diodes |
| 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 |
|---|---|---|---|---|---|---|---|
| Zener voltage (nominal VZ) | VZ | 10.8 | 11 | 11.2 | V | @ IZT = 5 mA | 2 |
| Zener voltage tolerance (B suffix, ±2%) |  | -2 |  | 2 | % |  | 1 |
| Maximum Zener impedance | ZZT |  |  | 20 | Ω | @ IZT = 5 mA | 2 |
| Maximum Zener impedance | ZZK |  |  | 70 | Ω | @ IZK = 1.0 mA | 2 |
| Power dissipation | Pd |  |  | 500 | mW |  | 1 |
| Forward voltage | VF |  |  | 0.9 | V | @ IF = 10 mA | 1 |
| Thermal resistance, junction to ambient air | RθJA |  |  | 305 | ℃/W |  | 1 |
| Junction temperature | Tj |  |  | 150 | ℃ |  | 1 |
| Storage temperature range | Tstg | -65 |  | 150 | ℃ |  | 1 |

## CAD (KiCad official)

- Symbol: `BZT52B11`
- Footprint: `Diode_SMD:D_SOD-123F`
- 3D model: SOD-123 (KiCad packages3D, STEP)
- 3D model files: `bzt52b11-etched.step` / `bzt52b11-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bzt52b11.step` / `bzt52b11.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/8588906342408441856) (3 pp, sha256 `fb9d91306da135f6`, retrieved 2026-10-17, 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/bzt52b11-datasheet.pdf)