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BZX384-B51

Public Made by Adom

by adom

Nexperia Zener Diodes, SOD-323(SC-76). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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Made with KiCad 10.0 · needs KiCad 10.0 or later to open · KiCad file format 20260206
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bzx384-b51-hero.glb bzx384-b51: hero GLB from the etched model (keeps the MPN mark) · Ray 11d ago
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BZX384-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.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); bzx384-b51.step / bzx384-b51.glb are 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, primary claude-haiku-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