# BZT52B27

**BORN** · Zener Diodes · SOD-123

BZT52B27 from BORN, 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, marked by the color band; the 27 V (26.46-27.54 V at IZT=2 mA) Zener voltage appears here, with max reverse current 0.1 uA at VR=18.9 V. |
| 2 | A | passive | Anode of the Zener diode; device power dissipation is 500 mW max and junction temperature is 150 °C max. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | BORN |
| Package | SOD-123 |
| Category | Diodes |
| Pins | 2 |

## CAD (KiCad official)

- Symbol: `BZT52B27`
- Footprint: `Diode_SMD:D_SOD-123F`
- 3D model: SOD-123 (KiCad packages3D, STEP)
- 3D model files: `bzt52b27-etched.step` / `bzt52b27-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bzt52b27.step` / `bzt52b27.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [BORN datasheet](docs/bzt52b27-datasheet.pdf) (7 pp, sha256 `711ed8a206704f7c`, retrieved 2026-10-09, 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/bzt52b27-datasheet.pdf)