# BZX79C12

**onsemi** · Zener Diodes · DO-35

BZX79C12 from onsemi, in a DO-35. 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 on the DO-35 glass case; the BZX79C12 zener voltage is 11.4 V min to 12.7 V max at 5 mA. |
| 2 | A | passive | Anode, the lead opposite the color band on the DO-35 glass case; forward voltage is 1.5 V max at IF = 100 mA. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | onsemi |
| Package | DO-35 |
| Category | Diodes |
| Pins | 2 |

## CAD (KiCad official)

- Symbol: `BZX79C12`
- Footprint: `Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal`
- 3D model: DO-35 (KiCad packages3D, STEP)

## Provenance

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

- **Datasheet:** [onsemi datasheet](docs/bzx79c12-datasheet.pdf) (4 pp, sha256 `516f27807dadf9e9`, retrieved 2026-10-26, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (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/bzx79c12-datasheet.pdf)