component
BZX58550-C4V7X
Public Made by Adomby adom
Nexperia Zener Diodes, SOD-523. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownBZX58550-C4V7X
Nexperia · Zener Diodes · SOD-523
BZX58550-C4V7X from Nexperia, in a SOD-523. 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 terminal; the marking bar on the package indicates the cathode. |
| 2 | A | passive | Anode terminal of the regulator diode, with no additional limits stated in the pinning table. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Nexperia |
| Package | SOD-523 |
| 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 |
|---|---|---|---|---|---|---|---|
| Tolerance series (working voltage) | -5 | 5 | % | Tolerance series approximately ±5 %; printed in Features for the BZX58550 series | 1 | ||
| Working voltage (BZX58550-C4V7) | VZ | 4.47 | 4.94 | V | IZ = 50 µA; Tj = 25 °C (table unless otherwise specified) | 4 | |
| Differential resistance (BZX58550-C4V7) | rdiff | 600 | Ω | IZ = 50 µA; Tj = 25 °C (column mapping to be verified) | 4 | ||
| Differential resistance (BZX58550-C4V7) | rdiff | 80 | Ω | IZ = 1 mA; Tj = 25 °C (column mapping to be verified) | 4 | ||
| Temperature coefficient (BZX58550-C4V7) | SZ | -2.7 | 2.5 | mV/K | Test current not explicitly printed on this row; Tj = 25 °C (table unless otherwise specified) | 4 | |
| Reverse current (BZX58550-C4V7) | IR | 5 | µA | VR = 3.0 V; Tj = 25 °C (table unless otherwise specified) | 4 | ||
| Diode capacitance (BZX58550-C4V7) | Cd | 140 | 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 | 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 | 300 | mW | Tamb ≤ 25 °C; device mounted on FR4 PCB with approx. 35 mm2 Cu area at cathode tab | 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) | 350 | K/W | In free air; device mounted on FR4 PCB with approx. 35 mm2 Cu area at cathode tab | 3 | ||
| Thermal resistance from junction to solder point | Rth(j-sp) | 65 | K/W | Soldering point of cathode tab | 3 |
CAD (KiCad official)
- Symbol:
BZX58550-C4V7X - Footprint:
Diode_SMD:D_SOD-523 - 3D model: SOD-523 (KiCad packages3D, STEP)
- 3D model files:
bzx58550-c4v7x-etched.step/bzx58550-c4v7x-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);bzx58550-c4v7x.step/bzx58550-c4v7x.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Nexperia datasheet (10 pp, sha256
ccce07a1e6449d86, retrieved 2026-10-15, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-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).