# BZX84B30

**Yangzhou Yangjie Elec Tech** · Zener Diodes · SOT-23(TO-236)

BZX84B30 from Yangzhou Yangjie Elec Tech, in a SOT-23(TO-236). 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 | A | passive | Anode of the 30V Zener diode (nominal Vz 30V, 29.4V to 30.6V at Izt=5mA). |
| 2 | NC | unconnected | No internal connection; the package diagram shows this pin without a connection to the diode. |
| 3 | K | passive | Cathode of the Zener diode, which goes positive in reverse breakdown; power dissipation is limited to 350mW. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Yangzhou Yangjie Elec Tech |
| Package | SOT-23(TO-236) |
| Category | Diodes |
| Pins | 3 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Nominal Zener Voltage | Vz | 29.4 | 30 | 30.6 | V | Izt=5mA | 2 |
| Maximum Zener Impedance | ZZT |  |  | 80 | Ω | IZT=5mA | 2 |
| Maximum Zener Impedance | ZZk |  |  | 300 | Ω | IZk=1mA | 2 |
| Min Reverse Leakage Current | IR |  |  | 0.1 | Ua | VR=21V | 2 |
| Maximum Forward Voltage | VF |  |  | 0.9 | V | IF=10mA | 1 |
| Power Dissipation | PD |  |  | 350 | mW |  | 1 |
| Peak Forward Surge Current | IFSM |  |  | 2 | A |  | 1 |
| Operation Temperature | TJ | -55 |  | 150 | ℃ |  | 1 |
| Storage Temperature Range | TSTG | -55 |  | 150 | ℃ |  | 1 |
| Thermal Resistance | RthJA |  |  | 357 | ℃/W |  | 1 |

## CAD (KiCad official)

- Symbol: `BZX84B30`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23(TO-236) (KiCad packages3D, STEP)
- 3D model files: `bzx84b30-etched.step` / `bzx84b30-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bzx84b30.step` / `bzx84b30.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Yangzhou Yangjie Elec Tech datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590164249479061504) (5 pp, sha256 `81a9a86e22a71f29`, retrieved 2026-10-14, 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/bzx84b30-datasheet.pdf)