component
BZX384-B51
Public Made by Adomby adom
Nexperia Zener Diodes, SOD-323(SC-76). 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
markdownBZX384-B51
Nexperia · Zener Diodes · SOD-323(SC-76)
BZX384-B51 from Nexperia, in a SOD-323(SC-76). 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 voltage regulator diode; the marking bar on the package indicates the cathode. |
| 2 | A | passive | Anode of the voltage regulator diode. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Nexperia |
| Package | SOD-323(SC-76) |
| 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 (B51 selection, nominal 51 V) | VZ | 50 | 52 | V | IZ = 2 mA; Tj = 25 °C unless otherwise specified | 7 | |
| Maximum differential resistance | rdif | 400 | Ω | IZ = 0.5 mA | 7 | ||
| Maximum differential resistance | rdif | 180 | Ω | IZ = 2 mA | 7 | ||
| Reverse current | IR | 0.05 | μA | VR = 35.7 V; Tj = 25 °C unless otherwise specified | 7 | ||
| Temperature coefficient | SZ | 46.6 | 57.2 | mV/K | IZ = 2 mA | 7 | |
| Diode capacitance | Cd | 40 | pF | f = 1 MHz; VR = 0 V | 7 | ||
| Non-repetitive peak reverse current | IZSM | 0.4 | A | tp = 100 μs; square wave; Tj = 25 °C | 7 | ||
| 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; device mounted on FR4 PCB, single-sided copper, tin-plated, standard footprint | 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; device mounted on 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 |
CAD (KiCad official)
- Symbol:
BZX384-B51 - Footprint:
Diode_SMD:D_SOD-323 - 3D model: SOD-323(SC-76) (KiCad packages3D, STEP)
- 3D model files:
bzx384-b51-etched.step/bzx384-b51-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);bzx384-b51.step/bzx384-b51.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Nexperia datasheet (14 pp, sha256
a381ee1ec1ad5a2b, retrieved 2026-10-15, 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).