# BZT52B2V4

**NH** · Zener Diodes · SOD-123

BZT52B2V4 from NH, 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 white band on the package; the Zener diode (2.4 V nominal Vz for BZT52B2V4, 500 mW power dissipation) is reverse biased with this pin positive. |
| 2 | A | passive | Anode, the end opposite the white cathode band; forward voltage is 0.9 V maximum at IF=10 mA. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | NH |
| 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 |
|---|---|---|---|---|---|---|---|
| Power Dissipation | PD |  |  | 500 | mW | Note 1: device mounted on ceramic PCB 7.6mm x 9.4mm x 0.87mm, pad areas 25mm² | 1 |
| Maximum instantaneous forward voltage | VF |  |  | 0.9 | V | IF=10mA; Note 2: pulse width < 10 ms | 1 |
| Zener voltage (Vz) | Vz | 2.35 | 2.4 | 2.45 | V | Izt=5 mA (Izt column of electrical table) | 2 |
| Operating temperature range | TOPR | -55 |  | 150 | ℃ |  | 1 |
| Storage temperature range | TSTG | -55 |  | 150 | ℃ |  | 1 |
| Thermal Resistance, Junction to Ambient Air | RθJA |  |  | 400 | ℃/W | Note 1: device mounted on ceramic PCB (as above) | 1 |

## CAD (KiCad official)

- Symbol: `BZT52B2V4`
- Footprint: `Diode_SMD:D_SOD-123F`
- 3D model: SOD-123 (KiCad packages3D, STEP)
- 3D model files: `bzt52b2v4-etched.step` / `bzt52b2v4-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bzt52b2v4.step` / `bzt52b2v4.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [NH datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603103817886154752) (6 pp, sha256 `7d743f0a19061d11`, retrieved 2026-10-18, 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/bzt52b2v4-datasheet.pdf)