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BZX55C12PF-M

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ST Semtech Zener Diodes, DO-35. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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BZX55C12PF-M

ST Semtech · Zener Diodes · DO-35

BZX55C12PF-M from ST Semtech, in a DO-35. 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, the lead on the black cathode band end of the DO-35 glass case, which goes positive in Zener (reverse) operation at VZnom 12 V (11.4 to 12.7 V at 5 mA).
2 A passive Anode, the lead at the end opposite the cathode band of the DO-35 glass case, with a forward voltage of max 1 V at IF = 100 mA.

Key specifications

Parameter Value
Manufacturer ST Semtech
Package DO-35
Category Diodes
Pins 2

CAD (KiCad official)

  • Symbol: BZX55C12PF-M
  • Footprint: Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal
  • 3D model: DO-35 (KiCad packages3D, STEP)

Provenance

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

  • Datasheet: ST Semtech datasheet (3 pp, sha256 ee653f040d509fde, retrieved 2026-10-13, 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