component

BZT52C43S

Public Made by Adom

by adom

TWGMC Zener Diodes, SOD-323. 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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BZT52C43S

TWGMC · Zener Diodes · SOD-323

BZT52C43S from TWGMC, in a SOD-323. 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, which goes positive in reverse breakdown; zener voltage range for the BZT52C43S is 40V min to 46V max at IZT = 2 mA, with total power dissipation of 200 mW max.
2 A passive Anode of the zener diode; forward voltage is 0.9 V at IF = 10 mA.

Key specifications

Parameter Value
Manufacturer TWGMC
Package SOD-323
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
Zener voltage (VZT), min VZT 40 V @ IZT = 2 mA 2
Zener voltage (VZT), max VZT 46 V @ IZT = 2 mA 2
Maximum Zener impedance ZZT 700 Ω @ IZT = 2 mA 2
Reverse current IR 0.1 μA VR = 32 V 2
Power dissipation PD 200 mW Device mounted on ceramic PCB (Note 1) 1
Operating and storage temperature range Tj, Tstg -55 150 °C 1
Forward voltage VF 0.9 V IF = 10 mA (Note 2) 1
Typical temperature coefficient 33.4 mV/°C @ IZTC 2
Thermal resistance, junction to ambient RθJA 625 °C/W 1

CAD (KiCad official)

  • Symbol: BZT52C43S
  • Footprint: Diode_SMD:D_SOD-323
  • 3D model: SOD-323 (KiCad packages3D, STEP)
  • 3D model files: bzt52c43s-etched.step / bzt52c43s-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); bzt52c43s.step / bzt52c43s.glb are the bare package body.

Provenance

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

  • Datasheet: TWGMC datasheet (3 pp, sha256 dc5da2c24ed08b06, retrieved 2026-11-02, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text+vision), consensus claude-opus-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