component
PZU4.3B2A
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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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PZU4.3B2A
Nexperia · Zener Diodes · SOD-323
PZU4.3B2A 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 Zener diode (marked by the marking bar); PZU4.3B2A has a working voltage of 4.15 V to 4.34 V at IZ = 5 mA. |
| 2 | A | passive | Anode of the Zener diode. |
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 (B2 selection, 4.3 V) | VZ | 4.15 | 4.34 | V | IZ = 5 mA, Tj = 25 °C | 4 | |
| Reverse current | IR | 3 | µA | VR = 1 V, Tj = 25 °C | 4 | ||
| Temperature coefficient | SZ | -2.5 | mV/K | IZ = 5 mA | 4 | ||
| Diode capacitance | Cd | 350 | pF | f = 1 MHz; VR = 0 V | 4 | ||
| Non-repetitive peak reverse current | IZSM | 8 | A | tp = 100 μs; square wave; Tj = 25 °C prior to surge | 4 | ||
| Forward voltage | VF | 0.9 | V | IF = 10 mA, Tamb = 25 °C | 3 | ||
| Forward voltage | VF | 1.1 | V | IF = 100 mA, Tamb = 25 °C | 3 | ||
| Forward current | IF | 200 | 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 | 320 | mW | Tamb ≤ 25 °C; FR4 PCB, standard footprint | 3 | ||
| Total power dissipation | Ptot | 490 | mW | Tamb ≤ 25 °C; FR4 PCB, mounting pad for cathode 1 cm2 | 3 | ||
| Junction temperature | Tj | 150 | °C | 3 | |||
| Ambient temperature | Tamb | -55 | 150 | °C | 3 | ||
| Storage temperature | Tstg | -65 | 150 | °C | 3 | ||
| Thermal resistance junction to ambient | Rth(j-a) | 390 | K/W | in free air; FR4 PCB, standard footprint | 3 | ||
| Thermal resistance junction to ambient | Rth(j-a) | 255 | K/W | in free air; FR4 PCB, mounting pad for cathode 1 cm2 | 3 | ||
| Thermal resistance junction to solder point | Rth(j-sp) | 55 | K/W | soldering point of cathode tab | 3 |
CAD (KiCad official)
- Symbol:
PZU4.3B2A - Footprint:
Diode_SMD:D_SOD-323 - 3D model: SOD-323 (KiCad packages3D, STEP)
- 3D model files:
pzu4-3b2a-etched.step/pzu4-3b2a-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);pzu4-3b2a.step/pzu4-3b2a.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Nexperia datasheet (12 pp, sha256
f95f1cc099eb023d, 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).
# PZU4.3B2A
**Nexperia** · Zener Diodes · SOD-323
PZU4.3B2A 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 Zener diode (marked by the marking bar); PZU4.3B2A has a working voltage of 4.15 V to 4.34 V at IZ = 5 mA. |
| 2 | A | passive | Anode of the Zener diode. |
## 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 (B2 selection, 4.3 V) | VZ | 4.15 | | 4.34 | V | IZ = 5 mA, Tj = 25 °C | 4 |
| Reverse current | IR | | | 3 | µA | VR = 1 V, Tj = 25 °C | 4 |
| Temperature coefficient | SZ | | -2.5 | | mV/K | IZ = 5 mA | 4 |
| Diode capacitance | Cd | | | 350 | pF | f = 1 MHz; VR = 0 V | 4 |
| Non-repetitive peak reverse current | IZSM | | | 8 | A | tp = 100 μs; square wave; Tj = 25 °C prior to surge | 4 |
| Forward voltage | VF | | | 0.9 | V | IF = 10 mA, Tamb = 25 °C | 3 |
| Forward voltage | VF | | | 1.1 | V | IF = 100 mA, Tamb = 25 °C | 3 |
| Forward current | IF | | | 200 | 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 | | | 320 | mW | Tamb ≤ 25 °C; FR4 PCB, standard footprint | 3 |
| Total power dissipation | Ptot | | | 490 | mW | Tamb ≤ 25 °C; FR4 PCB, mounting pad for cathode 1 cm2 | 3 |
| Junction temperature | Tj | | | 150 | °C | | 3 |
| Ambient temperature | Tamb | -55 | | 150 | °C | | 3 |
| Storage temperature | Tstg | -65 | | 150 | °C | | 3 |
| Thermal resistance junction to ambient | Rth(j-a) | | | 390 | K/W | in free air; FR4 PCB, standard footprint | 3 |
| Thermal resistance junction to ambient | Rth(j-a) | | | 255 | K/W | in free air; FR4 PCB, mounting pad for cathode 1 cm2 | 3 |
| Thermal resistance junction to solder point | Rth(j-sp) | | | 55 | K/W | soldering point of cathode tab | 3 |
## CAD (KiCad official)
- Symbol: `PZU4.3B2A`
- Footprint: `Diode_SMD:D_SOD-323`
- 3D model: SOD-323 (KiCad packages3D, STEP)
- 3D model files: `pzu4-3b2a-etched.step` / `pzu4-3b2a-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `pzu4-3b2a.step` / `pzu4-3b2a.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/8588914236009013248) (12 pp, sha256 `f95f1cc099eb023d`, 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/pzu4-3b2a-datasheet.pdf)