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1.5KE51A

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DOWO ESD And Surge Protection (TVS/ESD), DO-201. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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1.5KE51A

DOWO · ESD And Surge Protection (TVS/ESD) · DO-201

1.5KE51A from DOWO, in a DO-201. 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 end of the unidirectional 1.5KE51A, marked by the color band; the datasheet gives a 48.45 to 53.55 V breakdown voltage and 43.6 V working peak reverse voltage.
2 A passive Anode lead at the end opposite the color band; the datasheet gives a 1500 W peak pulse power rating with a 10/1000 μs waveform and 70.1 V maximum clamping voltage at 21.40 A.

Key specifications

Parameter Value
Manufacturer DOWO
Package DO-201
Category Circuit Protection
Pins 2

CAD (KiCad official)

  • Symbol: 1.5KE51A
  • Footprint: Diode_THT:D_DO-201AD_P15.24mm_Horizontal
  • 3D model: DO-201 (KiCad packages3D, STEP)

Provenance

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

  • Datasheet: DOWO datasheet (4 pp, sha256 f0f46eb9677ba9d9, 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