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README

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ESDL031-1BF4

STMicroelectronics · ESD And Surge Protection (TVS/ESD) · 0201

ESDL031-1BF4 from STMicroelectronics, in a 0201. 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 1 passive Bidirectional TVS terminal 1 (marked pin 1 side), line protected against ESD with VRM 3.3 V, VBR 5.0 to 6.6 V at 1 mA; terminals are interchangeable in polarity.
2 2 passive Bidirectional TVS terminal 2, the opposite terminal to pin 1; the device clamps to 6.3 V TLP at 16 A and has 10 to 12 pF line capacitance.

Key specifications

Parameter Value
Manufacturer STMicroelectronics
Package 0201
Category Circuit Protection
Pins 2

CAD (KiCad official)

  • Symbol: ESDL031-1BF4
  • Footprint: Diode_SMD:D_0201_0603Metric
  • 3D model: 0201, generated from the KiCad footprint (body from the F.Fab outline, terminals on the pads, 0.3 mm nominal 01005 height). Neither the vendor nor KiCad ships a 3D model for this package, so the dimensions are nominal, not the manufacturer's CAD (STEP)

Provenance

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

  • Datasheet: STMicroelectronics datasheet (11 pp, sha256 1f535f7fa3359c70, retrieved 2026-10-08, tier: manufacturer)
  • 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