Alps KFF Series

Alps KFF
A single desoldered Alps KFF switch
Manufacturer Alps Electric
Part Number(s) KFF#####1)
Switch Type Clicky
Travel 3.5mm
Sense method Metal contact
Mount Plate mount
Rated lifetime Unknown
Quoted operating force Unknown

The Alps KFF Series, sometimes referred to as SKFF2) or Alps vertical plate spring, is a series of keyboard switches made by Alps Electric in the late 1970s-1980s.

Characteristics

The switch was designed with double-action in mind, with two vertical plate spring modules able to be inserted either side of the stem. In the base switch, there is a single plate spring module, which is actuated by a plastic rocker that the spring rests on. When the switch is depressed, the stem compresses the spring and eventually presses on the rocker in the plate spring module, which inverts the plate spring from behind to bridge the two contacts, closing the circuit.

Bar Mount Switch

To be completed!

LED Switch

To be completed!

Double Action switches

To be completed!

1)
numbers unknown, but the base switch is likely KFF10901
2)
there is no evidence of the switch existing after the naming scheme change