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Generated by adom · KiCad file format 20241229

Name	Last commit message	Last updated
docs	Hero 16:10, provenance · John Lauer	2d ago
provenance	Hero 16:10, provenance · John Lauer	2d ago
viewers	Component page: symbol, footprint, Fusion library, viewers, provenance, models · John Lauer	2d ago
9774025243r-hero.glb	Component page: symbol, footprint, Fusion library, viewers, provenance, models · John Lauer	2d ago
9774025243r-hero.overlay.json	Component page: symbol, footprint, Fusion library, viewers, provenance, models · John Lauer	2d ago
9774025243r.glb	Component page: symbol, footprint, Fusion library, viewers, provenance, models · John Lauer	2d ago
9774025243r.kicad_mod	Component page: symbol, footprint, Fusion library, viewers, provenance, models · John Lauer	2d ago
9774025243r.kicad_sym	Component page: symbol, footprint, Fusion library, viewers, provenance, models · John Lauer	2d ago
9774025243r.lbr	Component page: symbol, footprint, Fusion library, viewers, provenance, models · John Lauer	2d ago
9774025243r.step	Component page: symbol, footprint, Fusion library, viewers, provenance, models · John Lauer	2d ago
LICENSE	Component page: symbol, footprint, Fusion library, viewers, provenance, models · John Lauer	2d ago
package.json	Component page: symbol, footprint, Fusion library, viewers, provenance, models · John Lauer	2d ago
page.json	Edited via adom-wiki: source · John Lauer	2d ago
README.md	README: resources table · John Lauer	2d ago

9774025243R

Wurth Elektronik · SMT spacers / standoffs (WA-SMSI, M2) · WA-SMSI, dia 4.35 x 2.5 mm above the PCB, dia 2.8 x 1.4 mm spigot

The Wurth Elektronik 9774025243R is a WA-SMSI surface-mount steel spacer with an M2 internal thread through its length, 2.5 mm tall above the board. It is placed and reflowed like any SMT part (a polyimide tape on top gives the pick-and-place nozzle a flat surface) and then takes an M2 screw, for example to hold the far end of an M.2 card, a daughterboard or a shield. A 2.8 mm spigot locates it in a 3.0 mm non-plated hole.

Key specifications

Parameter	Value
Thread	M2, internal, through
Length L	2.5 mm +-0.1
Body diameter	4.35 mm
Spigot	dia 2.8 x 1.4 mm (into a dia 3.0 non-plated hole)
Material / surface	Steel / tin
Max tightening torque	0.2 N m
Operating temperature	-55 C to +150 C
MSL	1
Solder paste	150 um min
Packing	Tape and reel, polyimide pick-up tape on top

Source: Wurth datasheet rev 001.003 p.1.

Pinout

Pin	Name	Type	Function
1	1	passive	Annular SMT solder pad (dia 5.3) around the dia 3.0 non-plated hole. Mechanical; the steel body connects whatever the pad is tied to (commonly ground) to the screwed part.

Footprint

The land pattern is Wurth's recommended pattern: a 5.3 mm annular solder pad around a 3.0 mm non-plated hole, with the suggested stencil (annulus 3.1 to 5.2 mm split into four by 0.6 mm webs). The ring copper runs to the hole edge as drawn, so KiCad's DRC reports a hole_clearance error that you clear with a rule or an exclusion. The footprint has one pad number (1); tie it to ground if the screw should ground the part it holds.

3D models

All 3D models on this page are AI-created from the manufacturer's dimensioned drawings (no manufacturer CAD file is used or redistributed). They are Z-up, in millimetres, seated on the PCB top surface (z = 0) at the footprint origin, so the footprint's model reference needs no offset or rotation. The builder script is in provenance/tools/.

File	What it is
`9774025243r.step` / `9774025243r.glb`	Plain model (also the board-use model)
`9774025243r-hero.glb`	Page model only: the board-use model plus teal dashed pad outlines, silkscreen with pin 1 and pad signal names (adom-hero 1.4). Do not place it on a board.

No part number is etched on this model. No clear flat surface: the top is a 1.2 mm wide ring around the M2 bore and the side is cylindrical, so the 11-character MPN cannot sit on a flat face without crossing the bore or being illegibly small. The plain model is the board-use model.

Sourcing

Distributor	Part number	Link
Mouser	710-9774025243R	https://www.mouser.com/en/ProductDetail/Wurth-Elektronik/9774025243R?qs=KRpiEsko4Hk6kXQfB%252BOLaw%3D%3D
DigiKey	732-7079-2-ND	https://www.digikey.com/en/products/detail/w%C3%BCrth-elektronik/9774025243R/5320622
LCSC	C22431115	https://www.lcsc.com/product-detail/C22431115.html

Distributor numbers checked on 2026-10-17 with adom-parts-search; check current stock and price at the links.

Manufacturer and resources

Resource	Link
Product page	https://www.we-online.com/en/components/products/WA-SMSI
Wurth Elektronik datasheet 9774025243R, WA-SMSI SMT steel spacer with internal thread, rev 001.003 (2025-12-31)	https://www.we-online.com/components/products/datasheet/9774025243R.pdf

Manufacturer documents are linked, not copied: download them from the manufacturer.

Files

File	Contents
`9774025243r.kicad_sym`	KiCad symbol with MPN, manufacturer and distributor fields
`9774025243r.kicad_mod`	KiCad footprint
`9774025243r.lbr`	Fusion 360 / EAGLE library (adom-lbr, lint clean)
`viewers/symbol.html`, `viewers/footprint.html`	Interactive embeds
`9774025243r-hero.overlay.json`	Hero artwork sidecar: pads, labels, alignment
`provenance/provenance.json`	Per-file provenance: source, classification, SHA-256, assumptions
`provenance/tools/`	Builder script for the AI-created STEP
`LICENSE`	CC BY 4.0 for the Adom-authored files

Provenance

Every file is classified in provenance/provenance.json as source-derived (written from a cited manufacturer document), AI-created (modelled from cited drawings) or derived (generated by a tool), with its SHA-256 and the source document's revision, retrieval date and hash.

Open items:

hole_clearance DRC needs a project rule or exclusion
Wurth STEP not obtained; model is AI-created
No virtual MPN mark (see mpn_marking)

License

The Adom-authored files are CC BY 4.0. Manufacturer documents and trademarks remain their owners'; none are redistributed here.