Kailh Choc v1 and v2 (PG1350 / PG1353): PCB footprint — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/kailh-choc-v1-v2-pcb-footprint/  (sheet CC BY 4.0)
Basis: Kailh drawings CPG135001D01 (PG1350, PCB hole drawing) and CPG135301D01 (PG1353, Recommended PCB Layout)
Catalog version: 2026-10-20

Sizes: see table below
- Kailh's low-profile Choc switches: v1 (PG1350) has its own two-leg keycap stem; v2 (PG1353) has an MX-style '+' stem. Both put the two contact pins in the same place, so one PCB can take either (and the same Choc hot-swap socket).
- Coordinates are in Kailh's own PCB-layout view, which looks at the copper (solder) side: origin on the switch axis, x to the right, y up. The v1 drawing is turned 180° here so both versions share one orientation; nothing else is changed. For a keycap-side view, mirror left to right (x → −x).
- Differences: the centre hole is Ø3.40 on v1 and Ø5.00 on v2; v1 has two Ø1.90 guide posts on the centre line 11.00 mm apart, v2 has one Ø1.60 guide post at (−5.15, −5.00). A v1+v2 board needs the Ø5.00 centre and all three guide holes.
- Plate: Kailh gives the housing below the top rim (13.80 square on v1, 13.95 ± 0.05 on v2), not a plate cutout or plate thickness, so Xem publishes no plate file; the cutout must clear that housing.
- The files are drill jigs at true size: a ring around every hole joined by bars to the centre hole, to print and drill through or to import as the exact hole pattern. Holes are drawn at the maker's diameters; add your own process allowance.

parameter  value
v1 centre post  Ø3.40 at (+0.00, +0.00) mm
v1 contact pin  Ø1.20 at (+5.90, +0.00) mm
v1 contact pin  Ø1.20 at (+3.80, +5.00) mm
v1 guide post  Ø1.90 at (+0.00, +5.50) mm
v1 guide post  Ø1.90 at (+0.00, -5.50) mm
v1 LED window centre  (-4.70, 0) mm (LED hole 5 × 3.15 in the housing)
v2 centre post  Ø5.00 at (+0.00, +0.00) mm
v2 contact pin  Ø1.20 at (+5.90, +0.00) mm
v2 contact pin  Ø1.20 at (+3.80, +5.00) mm
v2 guide post  Ø1.60 at (-5.15, -5.00) mm
v2 LED window centre  (-4.93, 0) mm
v1 housing below the top rim  13.80 × 13.80 mm (top rim 15.00 × 15.00)
v2 housing below the top rim  13.95 ± 0.05 × 13.95 ± 0.05 mm (top rim 15.00 × 15.00)
v2 stem  Ø5.50 with an MX-style cross: arms 4.00 ± 0.05 long, 1.30 ± 0.03 wide
v1 travel / v2 travel  3.0 +0/−0.5 mm / 3.2 ± 0.25 mm

Files elsewhere (not hosted by Xem Studio; license as stated by the publisher):
- Kailh (Kaihua Electronics): PG1350 low-profile switch drawing CPG135001D01 (PCB hole drawing, solder-side view); maker PDF via Keyboardio's datasheet mirror — web — Maker datasheet (linked, not rehosted) — https://github.com/keyboardio/keyswitch_documentation/blob/master/datasheets/Kailh/CPG135001D01.pdf
- Kailh (Kaihua Electronics): PG1353 (Choc v2) switch drawing CPG135301D01 (Recommended PCB Layout, pattern side); maker PDF via Keyboardio's datasheet mirror — web — Maker datasheet (linked, not rehosted) — https://github.com/keyboardio/keyswitch_documentation/blob/master/datasheets/Kailh/CPG135301D01.pdf

Free files (CC BY 4.0, Xem Studio; STEP + STL, 2 parts): https://xemstudio.com/files/hardware/kailh-choc-v1-v2-pcb-footprint/index.json
API: https://xemstudio.com/api/geometry?object=kailh-choc-v1-v2-pcb-footprint