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1.5KE9.1A

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Littelfuse 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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1.5KE9.1A

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

1.5KE9.1A from Littelfuse, 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, the lead on the color-band end of the unidirectional 1.5KE9.1A, which goes positive relative to the anode in normal operation (VR 7.78V standoff, VBR 8.65-9.50V at 1mA).
2 A passive Anode, the lead opposite the cathode band; the device clamps at VC 13.4V max at Ipp 113.4A (1500W 10/1000us peak pulse).

Key specifications

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

CAD (KiCad official)

  • Symbol: 1.5KE9.1A
  • 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: Littelfuse datasheet (6 pp, sha256 4290e23a327d9203, 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