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1N5222BPF

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ST Semtech Zener Diodes, DO-35. Unpolarised two-terminal part: the datasheet prints no pin numbers, so pins 1 and 2 follow the library convention, KiCad symbol/footprint/3D.

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1N5222BPF

ST Semtech · Zener Diodes · DO-35

1N5222BPF 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 banded/marked end per the datasheet; pad 1 of the KiCad diode footprint.
2 A passive Anode.

Key specifications

Parameter Value
Manufacturer ST Semtech
Package DO-35
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 (nominal VZnom 2.5 V) VZT 2.38 2.5 2.62 V at IZT = 20 mA 2
Zener voltage tolerance (suffix B) -5 5 % 1
Dynamic resistance ZZT 30 Ω at IZT = 20 mA 2
Dynamic resistance ZZK 1250 Ω at IZK = 0.25 mA 2
Reverse current IR 100 µA at VR = 1 V 2
Temperature coefficient of Zener voltage TKVZ -0.085 %/K 2
Forward voltage (family max) VF 1.1 V at IF = 200 mA 2
Power dissipation Ptot 500 mW Ta = 25℃ 1
Junction temperature Tj 175 ℃ 1
Storage temperature range Tstg -65 175 ℃ 1
Thermal resistance junction to ambient RθJA 300 ℃/W leads kept at ambient temperature at a distance of 8 mm from case 1

CAD (KiCad official)

  • Symbol: 1N5222BPF
  • 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 78f1b5fb0742f65a, retrieved 2026-10-15, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins, primary cathode-band convention (convention), consensus off (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