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BZT52C30W

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ST Semtech Zener Diodes, SOD-123. 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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BZT52C30W

ST Semtech · Zener Diodes · SOD-123

BZT52C30W from ST Semtech, in a SOD-123. 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 Cathode passive Cathode terminal of the Zener diode, identified on the package by the cathode line marking; the part is rated for 500 mW total power dissipation and 150 °C maximum junction temperature.
2 Anode passive Anode terminal of the Zener diode; the datasheet gives a maximum VF of 0.9 V at IF = 10 mA and a total power dissipation of 500 mW maximum.

Key specifications

Parameter Value
Manufacturer ST Semtech
Package SOD-123
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
Dynamic impedance ZZT ZZT 80 Ω at IZT = 2 mA 2
Dynamic impedance ZZK ZZK 300 Ω at IZK = 0.5 mA (see review_required) 2
Reverse leakage current IR IR 0.1 µA at VR = 21 V 2
Forward voltage VF VF 0.9 V at IF = 10 mA 2
Power dissipation Ptot Ptot 500 mW TL = 75 ℃ 1
Junction temperature TJ TJ 150 ℃ 1
Storage temperature range Tstg Tstg -65 150 ℃ 1
Thermal resistance junction to ambient RθJA RθJA 340 ℃/W Mounted on FR-4 PCB 38381.6 mm, single-sided Cu pad 25 mm2 1
Thermal resistance junction to lead RθJL RθJL 150 ℃/W FR-4 PCB 89*38 mm 1

CAD (KiCad official)

  • Symbol: BZT52C30W
  • Footprint: Diode_SMD:D_SOD-123F
  • 3D model: SOD-123 (KiCad packages3D, STEP)
  • 3D model files: bzt52c30w-etched.step / bzt52c30w-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); bzt52c30w.step / bzt52c30w.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: ST Semtech datasheet (4 pp, sha256 7194c21269af8b10, retrieved 2026-10-17, 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