component
BZX384-B12
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Nexperia Zener Diodes, SOD-323. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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BZX384-B12
Nexperia · Zener Diodes · SOD-323
BZX384-B12 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 of the 12 V (±2 %, VZ 11.80-12.20 V at IZ = 5 mA) voltage regulator diode; the marking bar indicates the cathode. |
| 2 | A | passive | Anode of the voltage regulator diode; forward voltage max 0.9 V at IF = 10 mA and IF max 250 mA. |
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 (B grade) | VZ | 11.8 | 12 | 12.2 | V | IZ = 5 mA, Tj = 25 °C | 6 |
| Maximum differential resistance | rdif | 150 | Ω | IZ = 1 mA | 6 | ||
| Maximum differential resistance | rdif | 25 | Ω | IZ = 5 mA | 6 | ||
| Reverse current | IR | 0.1 | μA | VR = 8 V | 6 | ||
| Temperature coefficient | SZ | 6 | 10 | mV/K | IZ = 5 mA | 6 | |
| Diode capacitance | Cd | 85 | pF | f = 1 MHz; VR = 0 V | 6 | ||
| Non-repetitive peak reverse current | IZSM | 2.5 | A | tp = 100 μs; square wave; Tj = 25 °C | 6 | ||
| Forward voltage | VF | 0.9 | V | IF = 10 mA; pulse test tp ≤ 100 μs; δ ≤ 0.02 | 4 | ||
| Forward voltage | VF | 1.1 | V | IF = 100 mA; pulse test tp ≤ 100 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 | 300 | mW | Tamb ≤ 25 °C | 4 | ||
| Junction temperature | Tj | 150 | °C | 4 | |||
| Ambient temperature | Tamb | -65 | 150 | °C | 4 | ||
| Storage temperature | Tstg | -65 | 150 | °C | 4 | ||
| Thermal resistance from junction to ambient | Rth(j-a) | 415 | K/W | in free air; FR4 PCB, single-sided copper, tin-plated, standard footprint | 4 | ||
| Thermal resistance from junction to solder point | Rth(j-sp) | 110 | K/W | soldering point of cathode tab | 4 | ||
| Tolerance of working voltage (B series) | -2 | 2 | % | BZX384-B | 1 |
CAD (KiCad official)
- Symbol:
BZX384-B12 - Footprint:
Diode_SMD:D_SOD-323 - 3D model: SOD-323 (KiCad packages3D, STEP)
- 3D model files:
bzx384-b12-etched.step/bzx384-b12-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);bzx384-b12.step/bzx384-b12.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Nexperia datasheet (14 pp, sha256
a381ee1ec1ad5a2b, retrieved 2026-10-22, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text), consensusclaude-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).
# BZX384-B12
**Nexperia** · Zener Diodes · SOD-323
BZX384-B12 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 of the 12 V (±2 %, VZ 11.80-12.20 V at IZ = 5 mA) voltage regulator diode; the marking bar indicates the cathode. |
| 2 | A | passive | Anode of the voltage regulator diode; forward voltage max 0.9 V at IF = 10 mA and IF max 250 mA. |
## 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 (B grade) | VZ | 11.8 | 12 | 12.2 | V | IZ = 5 mA, Tj = 25 °C | 6 |
| Maximum differential resistance | rdif | | | 150 | Ω | IZ = 1 mA | 6 |
| Maximum differential resistance | rdif | | | 25 | Ω | IZ = 5 mA | 6 |
| Reverse current | IR | | | 0.1 | μA | VR = 8 V | 6 |
| Temperature coefficient | SZ | 6 | | 10 | mV/K | IZ = 5 mA | 6 |
| Diode capacitance | Cd | | | 85 | pF | f = 1 MHz; VR = 0 V | 6 |
| Non-repetitive peak reverse current | IZSM | | | 2.5 | A | tp = 100 μs; square wave; Tj = 25 °C | 6 |
| Forward voltage | VF | | | 0.9 | V | IF = 10 mA; pulse test tp ≤ 100 μs; δ ≤ 0.02 | 4 |
| Forward voltage | VF | | | 1.1 | V | IF = 100 mA; pulse test tp ≤ 100 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 | | | 300 | mW | Tamb ≤ 25 °C | 4 |
| Junction temperature | Tj | | | 150 | °C | | 4 |
| Ambient temperature | Tamb | -65 | | 150 | °C | | 4 |
| Storage temperature | Tstg | -65 | | 150 | °C | | 4 |
| Thermal resistance from junction to ambient | Rth(j-a) | | | 415 | K/W | in free air; FR4 PCB, single-sided copper, tin-plated, standard footprint | 4 |
| Thermal resistance from junction to solder point | Rth(j-sp) | | | 110 | K/W | soldering point of cathode tab | 4 |
| Tolerance of working voltage (B series) | | -2 | | 2 | % | BZX384-B | 1 |
## CAD (KiCad official)
- Symbol: `BZX384-B12`
- Footprint: `Diode_SMD:D_SOD-323`
- 3D model: SOD-323 (KiCad packages3D, STEP)
- 3D model files: `bzx384-b12-etched.step` / `bzx384-b12-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bzx384-b12.step` / `bzx384-b12.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/8586185528655536128) (14 pp, sha256 `a381ee1ec1ad5a2b`, retrieved 2026-10-22, tier: lcsc)
- **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/bzx384-b12-datasheet.pdf)