GSD2004S-E3-08 from Vishay, in a SOT-23-3. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin	Name	Type	Function
1	A1	passive	Anode of diode D1. In-series dual diode: current flows from pin 1 (anode D1) through the common pin 3 to pin 2 (cathode D2). Rated VR = 240 V, IF = 225 mA continuous, VF = 0.83 V typ @ 20 mA.
2	K2	passive	Cathode of diode D2. Downstream end of the dual in-series diode chain.
3	K1/A2	passive	Common node: cathode of D1 tied to anode of D2. This is the midpoint of the two series-connected diodes.

Key specifications

Parameter	Value
Manufacturer	Vishay
Package	SOT-23-3
Category	PMIC
Pins	3

Ordering variants

Same part, different packaging or reel option.

GSD2004S-E3-08
GSD2004S-E3-08E3-18
GSD2004S-E3-08HE3-08
GSD2004S-E3-08HE3-18

CAD (KiCad official)

Symbol: GSD2004S-E3-08
Footprint: Package_TO_SOT_SMD:SOT-23-3
3D model: SOT-23-3 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`gsd2004s-e3-08.step`	59 KB	You want the bare part, or you mark your own boards.
`gsd2004s-e3-08-etched.step`	2.7 MB	You want the part with `GSD2004S-E3-08` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 641 faces against 69 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.

Provenance

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

Datasheet: Vishay datasheet (4 pp, sha256 6aa343d75a2525e4, retrieved 2026-08-17, tier: lcsc)
Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF