# BZT52H-C4V3

**Nexperia** · Zener Diodes · SOD-123F

BZT52H-C4V3 from Nexperia, in a SOD-123F. 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 of the Zener diode (marking bar indicates the cathode); BZT52H-C4V3 has a working voltage of 4.00 V to 4.60 V at IZ = 5 mA. |
| 2 | A | passive | Anode of the Zener diode; forward voltage is at most 0.9 V at IF = 10 mA and forward current is limited to 250 mA. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Nexperia |
| Package | SOD-123F |
| 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 |
|---|---|---|---|---|---|---|---|
| Working voltage | VZ | 4 |  | 4.6 | V | IZ = 5 mA, Tj = 25 °C | 5 |
| Maximum differential resistance | rdif |  |  | 500 | Ω | IZ = 1 mA | 5 |
| Maximum differential resistance | rdif |  |  | 95 | Ω | IZ = 5 mA | 5 |
| Reverse current | IR |  |  | 3 | µA | VR = 1 V | 5 |
| Temperature coefficient | SZ | -3.5 |  | 0 | mV/K | IZ = 5 mA | 5 |
| Diode capacitance | Cd |  |  | 450 | pF | f = 1 MHz; VR = 0 V | 5 |
| Non-repetitive peak reverse current | IZSM |  |  | 6 | A | tp = 100 μs; Tamb = 25 °C | 5 |
| Forward voltage | VF |  |  | 0.9 | V | IF = 10 mA; pulse test tp ≤ 300 μs; δ ≤ 0.02 | 4 |
| Forward current | IF |  |  | 250 | mA |  | 4 |
| Non-repetitive peak reverse power dissipation | PZSM |  |  | 40 | W | tp = 100 μs; square wave; Tj = 25 °C prior to surge | 4 |
| Total power dissipation | Ptot |  |  | 375 | mW | Tamb ≤ 25 °C; FR4 PCB, single-sided copper, tin-plated, standard footprint | 4 |
| Total power dissipation | Ptot |  |  | 830 | mW | Tamb ≤ 25 °C; FR4 PCB, mounting pad for cathode 1 cm2 | 4 |
| Junction temperature | Tj |  |  | 150 | °C |  | 4 |
| Ambient temperature | Tamb | -65 |  | 150 | °C |  | 4 |
| Storage temperature | Tstg | -65 |  | 150 | °C |  | 4 |
| Thermal resistance junction to ambient | Rth(j-a) |  |  | 330 | K/W | in free air; FR4 PCB, standard footprint | 4 |
| Thermal resistance junction to ambient | Rth(j-a) |  |  | 150 | K/W | in free air; FR4 PCB, mounting pad for cathode 1 cm2 | 4 |
| Thermal resistance junction to solder point | Rth(j-sp) |  |  | 70 | K/W | Soldering point of cathode tab | 4 |

## CAD (KiCad official)

- Symbol: `BZT52H-C4V3`
- Footprint: `Diode_SMD:D_SOD-123F`
- 3D model: SOD-123F (KiCad packages3D, STEP)
- 3D model files: `bzt52h-c4v3-etched.step` / `bzt52h-c4v3-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bzt52h-c4v3.step` / `bzt52h-c4v3.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Nexperia datasheet](https://assets.nexperia.com/documents/data-sheet/BZT52H-C4V3.pdf) (14 pp, sha256 `a5e54de45bdf1af7`, retrieved 2026-10-23, tier: manufacturer)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text), consensus `claude-sonnet-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/bzt52h-c4v3-datasheet.pdf)