Alps SKCL Yellow

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Alps SKCL Yellow
Alps SKCL Yellow -- infobox.jpg
Manufacturer Alps Electric
Family Alps SKCL/SKCM series
Product code SKCLAR
Introduced ca. 1988[1]
Discontinued ca. 1998[1]
Switch type Linear
Sense method Metal contact
Actuation force 58.8 cN
Keycap mount Alps mount
Switch mount Plate mount

Alps SKCL Yellow, or yellow Alps, is a linear switch in the "complicated" Alps SKCL/SKCM series.


Yellow Alps have an LED recess; the LED occupies the position where the tactile or click leaf should go. Typically this recess is left empty. It appears that switches ordered without an LED pre-fitted lacked the LED holes in the lower shell.

Yellow Alps appears to be the longest-running product in the SKCL/SKCM series. It appears to have been introduced around 1988, with approximately two years' overlap with Alps SKCL Green; the latter appears to be slightly lower in force. The earliest yellow Alps switches had long slits and no Alps logo, but by 1990 or so the mould had been replaced with one with the Alps logo and short slits. The SKCLAR/SKCMCQ data sheet along with MouseFan's data suggests that the slits were never removed.


Part number Description Source
SKCLAR No LED fitted? 1994 catalogue
SKCLFQ Red LED fitted 1994 catalogue
SKCLFM Green LED fitted 1994 catalogue



Yellow vs green


The following used switches originated in a Zenith ZKB-2 AT keyboard.[6] They are assumed to be SKCLAR as they match the 1994 Alps catalogue specification. Being shipped without LEDs fitted, the base does not accept LEDs without suitable holes being drilled into it.


The following switches are NOS surplus from China. They are assumed to be SKCLFQ (per the 1994 Alps catalogue) based on their characteristics.



  1. 1.0 1.1 MouseFan — ALPS (Japanese only) Retrieved 2015-07-21.
  2. 2.0 2.1 2.2 Atelier Silencium — AX & Alps Bigfoot Keyboard (Japanese only) Dated 2010-02-17. Retrieved 2015-07-21.
  3. MouseFan — NEC PK-KB015 USB JAPAN (Japanese only) Retrieved 2015-07-21.
  4. ちゃたりたいね — PACKARD BELL KCLEA907L ALPS茶軸リニア (Japanese only) Dated 2013-08-25. Retrieved 2015-07-21.
  5. Sandy — zkb-2 (Japanese only)
  6. geekhack — FS (Price Drops): Zenith (linear green alps) & SGI case