# BZX38450-C5V6-QX

**NEXPERIA** · Global Sourcing Parts · SOD-323

BZX38450-C5V6-QX from NEXPERIA, in a SOD-323. 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; the marking bar on the package indicates the cathode. |
| 2 | A | passive | Anode of the voltage regulator diode. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | NEXPERIA |
| Package | SOD-323 |
| Category | Global Sourcing Parts |
| 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 (5V6 type) | VZ | 5.32 |  | 5.88 | V | Tj = 25 °C unless otherwise specified | 4 |
| Temperature coefficient (5V6 type) | SZ | -2 |  | 3.7 | mV/K | Tj = 25 °C unless otherwise specified | 4 |
| Differential resistance (5V6 type) | rdiff |  |  | 400 | Ω | IZ = 50 µA | 4 |
| Differential resistance (5V6 type) | rdiff |  |  | 40 | Ω | IZ = 1 mA | 4 |
| Differential resistance (5V6 type) | rdiff |  |  | 2 | Ω | IZ = 5 mA | 4 |
| Diode capacitance (5V6 type) | Cd |  |  | 120 | pF | f = 1 MHz; VR = 0 V | 4 |
| Forward voltage | VF |  |  | 0.9 | V | IF = 10 mA; pulse test tp ≤ 300 µs; δ ≤ 0.02 | 4 |
| Forward current | IF |  |  | 250 | mA |  | 3 |
| Non-repetitive peak reverse power dissipation | PZSM |  |  | 40 | W | tp = 100 µs; square wave; Tj = 25 °C; prior to surge | 3 |
| Total power dissipation | Ptot |  |  | 300 | mW | Tamb ≤ 25 °C; device mounted on FR4 PCB | 3 |
| Junction temperature | Tj |  |  | 150 | °C |  | 3 |
| Ambient temperature | Tamb | -55 |  | 150 | °C |  | 3 |
| Storage temperature | Tstg | -65 |  | 150 | °C |  | 3 |
| Thermal resistance from junction to ambient | Rth(j-a) |  |  | 415 | K/W | in free air; device mounted on FR4 PCB | 3 |
| Thermal resistance from junction to solder point | Rth(j-sp) |  |  | 110 | K/W | soldering point of cathode tab | 3 |

## CAD (KiCad official)

- Symbol: `BZX38450-C5V6-QX`
- Footprint: `Diode_SMD:D_SOD-323`
- 3D model: SOD-323 (KiCad packages3D, STEP)
- 3D model files: `bzx38450-c5v6-qx-etched.step` / `bzx38450-c5v6-qx-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bzx38450-c5v6-qx.step` / `bzx38450-c5v6-qx.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/BZX38450-C5V6-QX.pdf) (10 pp, sha256 `d3fb6f2f0e7015f7`, retrieved 2026-11-05, tier: manufacturer)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-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/bzx38450-c5v6-qx-datasheet.pdf)