Alps SKCM Beige
Manufacturer	Alps Electric
Family	Alps SKCM/SKCL series
Part Number	SKCMAF
Switch Type	Tactile
Travel	3.5mm
Sense method	Metal contact
Mount	Plate mount
Rated lifetime	20 million cycles
Quoted operating force	70gf

Alps SKCM Beige is a tactile switch in the first generation of the Alps SKCM/SKCL Series.

The switch follows the general characteristics of the SKCM family, consisting of an upper and lower housing, contact module, stem, spring and a leaf spring for generating the tactile event.

As a first generation SKCM/SKCL switch, the upper housing always has slits (colloquially referred to as the “pine” variant). Similar to other first generation switches, the only Alps branding on the switch is the older Alps logo on the bottom of the lower housing.

The stem, which is a beige or cream color, was lubricated at the factory.

The tactile feedback is generated with a leaf spring that is situated on the opposite side of the housing to the contact module. There were at least two variations of this leaf spring. Alps SKCM Beige, like all SKCM/SKCL series switches, uses a contact module to register the keypress. This sits in the housing on the side with visible notches.

The switch was likely in production from 1985 to around 1989. Tall grey contact modules are most common. Variations in stem dye lots were commonplace and should not be taken as evidence of some instance of the switch being better than another.

The leaf spring that generates the tactile event had at least one revision. The original form of this leaf spring had two wide side tabs and no bend at the bottom, as well as appearing visually to be made from a different material¹⁾. The more common form has four side tabs, similar to other tactile switches in the family.