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1N5255B

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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.

componentdiodes1n5255bfactory-2.0.0extractor-text

Verified 1N5255B

by Ray · last 30 Oct 2026 · 1 record · files match
SymbolFootprint3D modelPins

Verification log 1 record

30 Oct 2026RayPublished by the parts factory: tier mfr, 2 pinsfiles match
SymbolFootprint3D modelPinsfor all variants
  • ✓component-page-verify: PASS
  • ✓cad_props: Datasheet, MPN and distributor properties match page.json
  • ✓component: 1N5255B · DO-35 · 2 pins
  • ✓copper: 2 copper pads, none touching another net
  • ✓datasheet: all 2 pin names found in the 3-page datasheet
  • ✓distributor: lcsc C118674, digikey 2156-1N5255B-488-ND, mouser 494-1N5255B(DO-35)
  • ✓family: D_DO-35_SOD27_P7.62mm_Horizontal
  • ✓files: 6 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-3lbnmlt3/x.lbr is a valid EAGLE .lbr with complete deviceset
  • ✓license: CC-BY-SA-4.0
  • ✓models_3d: 1 records
  • •package_fit (skip): the datasheet dimensions give no height or body size to compare (datasheet p.1)
  • ✓pads: 2 pins = 2 pads
  • ✓pose: 1 STEP(s) Z-up, seated, centred
  • ✓symbol: 2 pins agree
  • ✓visibility: public, source open
Evidencedatasheet
Verified files✓ 1n5255b.kicad_sym✓ 1n5255b.kicad_mod✓ 1n5255b.step
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Ray Publish 0.1.0 ab291a8 15h ago

1N5255B

ST(Semtech) · Zener Diodes · DO-35

1N5255B 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 VZT (min/max) VZT 26.6 29.4 V at IZT = 4.5 mA; tested with pulses tp = 20 ms 2
Dynamic resistance ZZT ZZT 44 Ω at IZT = 4.5 mA 2
Dynamic resistance ZZK ZZK 600 Ω at IZK = 0.25 mA 2
Reverse current IR IR 0.1 µA at VR = 21 V 2
Temperature coefficient of Zener voltage TKVZ TKVZ 0.091 %/K 2
Zener voltage tolerance (suffix B) -5 5 % suffix B = ±5% tolerance 1
Nominal Zener voltage VZnom VZnom 28 V 2
Power dissipation Ptot Ptot 500 mW leads kept at ambient temperature at 8 mm from case 1
Junction temperature Tj Tj 200 °C 1
Storage temperature range Tstg Tstg -65 200 °C 1
Thermal resistance junction to ambient air RθJA RθJA 0.3 K/mW leads kept at ambient temperature at 8 mm from case 1
Forward voltage VF VF 1.1 V IF = 200 mA 1

CAD (KiCad official)

  • Symbol: 1N5255B
  • 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 31e7ca5738ce26b3, retrieved 2026-10-30, tier: manufacturer)
  • 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