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BZX585-C3V9
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Nexperia Zener Diodes, SOD-523(SC-79). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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BZX585-C3V9
Nexperia · Zener Diodes · SOD-523(SC-79)
BZX585-C3V9 from Nexperia, in a SOD-523(SC-79). 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; the marking bar on the package indicates the cathode. |
| 2 | A | passive | Anode of the Zener diode. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Nexperia |
| Package | SOD-523(SC-79) |
| 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 (C grade) | VZ | 3.71 | 4.1 | V | 4 | ||
| Differential resistance | rdiff | 85 | 90 | Ω | IZ = 5 mA | 4 | |
| Differential resistance | rdiff | 400 | 500 | Ω | IZ = 1 mA | 4 | |
| Temperature coefficient | SZ | -3.5 | -1.9 | 0 | mV/K | IZ = 5 mA | 4 |
| Reverse current | IR | 3 | µA | IZ = 5 mA; VR = 1.0 V | 4 | ||
| Diode capacitance | Cd | 370 | pF | f = 1 MHz; VR = 0 V | 4 | ||
| Non-repetitive peak reverse current | IZSM | 6 | A | tp = 100 µs; square wave; Tj = 25 °C before surge | 4 | ||
| Tolerance (C series) | -5 | 5 | % | 4 | |||
| Forward voltage | VF | 0.9 | V | IF = 10 mA; pulse test tp ≤ 300 μs; δ ≤ 0.02 | 4 | ||
| Forward voltage | VF | 1.1 | V | IF = 100 mA; pulse test tp ≤ 300 μs; δ ≤ 0.02 | 4 | ||
| Forward current | IF | 200 | mA | 3 | |||
| Non-repetitive peak reverse power dissipation | PZSM | 40 | W | tp = 100 µs; square wave; Tamb = 25 °C; prior to surge | 3 | ||
| Total power dissipation | Ptot | 300 | mW | Tamb = 25 °C; device mounted on FR4 PCB, ~35 mm2 Cu at cathode tab | 3 | ||
| Junction temperature | Tj | -65 | 150 | °C | 3 | ||
| Ambient temperature | Tamb | -65 | 150 | °C | 3 | ||
| Storage temperature | Tstg | -65 | 150 | °C | 3 | ||
| Thermal resistance junction to ambient | Rth(j-a) | 350 | K/W | in free air; device mounted on FR4 PCB | 3 | ||
| Thermal resistance junction to solder point | Rth(j-sp) | 65 | K/W | soldering point of cathode tab | 3 |
CAD (KiCad official)
- Symbol:
BZX585-C3V9 - Footprint:
Diode_SMD:D_SOD-523 - 3D model: SOD-523(SC-79) (KiCad packages3D, STEP)
- 3D model files:
bzx585-c3v9-etched.step/bzx585-c3v9-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);bzx585-c3v9.step/bzx585-c3v9.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Nexperia datasheet (13 pp, sha256
ce6f045443a822c0, retrieved 2026-10-26, tier: manufacturer) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-sonnet-5-5(agreed (audit)), 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).
# BZX585-C3V9
**Nexperia** · Zener Diodes · SOD-523(SC-79)
BZX585-C3V9 from Nexperia, in a SOD-523(SC-79). 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; the marking bar on the package indicates the cathode. |
| 2 | A | passive | Anode of the Zener diode. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Nexperia |
| Package | SOD-523(SC-79) |
| 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 (C grade) | VZ | 3.71 | | 4.1 | V | | 4 |
| Differential resistance | rdiff | | 85 | 90 | Ω | IZ = 5 mA | 4 |
| Differential resistance | rdiff | | 400 | 500 | Ω | IZ = 1 mA | 4 |
| Temperature coefficient | SZ | -3.5 | -1.9 | 0 | mV/K | IZ = 5 mA | 4 |
| Reverse current | IR | | | 3 | µA | IZ = 5 mA; VR = 1.0 V | 4 |
| Diode capacitance | Cd | | | 370 | pF | f = 1 MHz; VR = 0 V | 4 |
| Non-repetitive peak reverse current | IZSM | | | 6 | A | tp = 100 µs; square wave; Tj = 25 °C before surge | 4 |
| Tolerance (C series) | | -5 | | 5 | % | | 4 |
| Forward voltage | VF | | | 0.9 | V | IF = 10 mA; pulse test tp ≤ 300 μs; δ ≤ 0.02 | 4 |
| Forward voltage | VF | | | 1.1 | V | IF = 100 mA; pulse test tp ≤ 300 μs; δ ≤ 0.02 | 4 |
| Forward current | IF | | | 200 | mA | | 3 |
| Non-repetitive peak reverse power dissipation | PZSM | | | 40 | W | tp = 100 µs; square wave; Tamb = 25 °C; prior to surge | 3 |
| Total power dissipation | Ptot | | | 300 | mW | Tamb = 25 °C; device mounted on FR4 PCB, ~35 mm2 Cu at cathode tab | 3 |
| Junction temperature | Tj | -65 | | 150 | °C | | 3 |
| Ambient temperature | Tamb | -65 | | 150 | °C | | 3 |
| Storage temperature | Tstg | -65 | | 150 | °C | | 3 |
| Thermal resistance junction to ambient | Rth(j-a) | | | 350 | K/W | in free air; device mounted on FR4 PCB | 3 |
| Thermal resistance junction to solder point | Rth(j-sp) | | | 65 | K/W | soldering point of cathode tab | 3 |
## CAD (KiCad official)
- Symbol: `BZX585-C3V9`
- Footprint: `Diode_SMD:D_SOD-523`
- 3D model: SOD-523(SC-79) (KiCad packages3D, STEP)
- 3D model files: `bzx585-c3v9-etched.step` / `bzx585-c3v9-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bzx585-c3v9.step` / `bzx585-c3v9.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/BZX585-C3V9.pdf) (13 pp, sha256 `ce6f045443a822c0`, retrieved 2026-10-26, tier: manufacturer)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-5-5` (agreed (audit)), 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/bzx585-c3v9-datasheet.pdf)