# BZX38450-C10-QX

**Nexperia** · Zener Diodes · SOD-323

BZX38450-C10-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 terminal. |
| 2 | A | passive | Anode of the voltage regulator diode, opposite the cathode (pin 1). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Nexperia |
| Package | SOD-323 |
| 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, minimum (BZX38450-C10-Q) | VZ | 9.5 |  |  | V | Tj = 25 °C unless otherwise specified; IZ per Table 8 column header | 4 |
| Working voltage VZ, maximum (BZX38450-C10-Q) | VZ |  |  | 10.5 | V | Tj = 25 °C unless otherwise specified; IZ per Table 8 column header | 4 |
| Differential resistance rdiff, maximum (first rdiff column) | rdiff |  |  | 150 | Ω | Tj = 25 °C unless otherwise specified; first rdiff column of Table 8 (IZ mapping not explicit) | 4 |
| Differential resistance rdiff, maximum (second rdiff column) | rdiff |  |  | 20 | Ω | Tj = 25 °C unless otherwise specified; second rdiff column of Table 8 (IZ mapping not explicit) | 4 |
| Reverse current IR, maximum | IR |  |  | 0.1 | µA | VR = 7.6 V (Table 8 VR column for this type) | 4 |
| Temperature coefficient SZ, minimum | SZ | 4.5 |  |  | mV/K | Tj = 25 °C unless otherwise specified | 4 |
| Temperature coefficient SZ, maximum | SZ |  |  | 8 | mV/K | Tj = 25 °C unless otherwise specified | 4 |
| Diode capacitance Cd, maximum | Cd |  |  | 90 | pF | f = 1 MHz; VR = 0 V | 4 |
| Series tolerance (approximate) |  | -5 |  | 5 | % | Series tolerance, stated as approximately ±5 % in Features | 1 |
| Forward voltage VF, maximum | VF |  |  | 0.9 | V | IF = 10 mA; pulse test tp ≤ 300 µs; δ ≤ 0.02 | 4 |
| Forward current IF, maximum | IF |  |  | 250 | mA |  | 3 |
| Non-repetitive peak reverse power dissipation PZSM, maximum | PZSM |  |  | 40 | W | tp = 100 µs; square wave; Tj = 25 °C; prior to surge | 3 |
| Total power dissipation Ptot, maximum | Ptot |  |  | 300 | mW | Tamb ≤ 25 °C; device mounted on FR4 PCB, single-sided copper, standard footprint | 3 |
| Junction temperature Tj, maximum | Tj |  |  | 150 | °C |  | 3 |
| Ambient temperature Tamb | Tamb | -55 |  | 150 | °C |  | 3 |
| Storage temperature Tstg | Tstg | -65 |  | 150 | °C |  | 3 |
| Thermal resistance junction to ambient Rth(j-a), maximum | Rth(j-a) |  |  | 415 | K/W | In free air; device mounted on FR4 PCB, single-sided copper, standard footprint | 3 |
| Thermal resistance junction to solder point Rth(j-sp), maximum | Rth(j-sp) |  |  | 110 | K/W | Soldering point of cathode tab | 3 |

## CAD (KiCad official)

- Symbol: `BZX38450-C10-QX`
- Footprint: `Diode_SMD:D_SOD-323`
- 3D model: SOD-323 (KiCad packages3D, STEP)
- 3D model files: `bzx38450-c10-qx-etched.step` / `bzx38450-c10-qx-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bzx38450-c10-qx.step` / `bzx38450-c10-qx.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Nexperia datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8600663650185601024) (10 pp, sha256 `d3fb6f2f0e7015f7`, retrieved 2026-10-22, tier: lcsc)
- **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-c10-qx-datasheet.pdf)