Editing Clare-Pendar Series S840 (section)

==Description==
Per the illuminated version, the shell is 16.2 mm tall including standoffs, and around 14.3 mm wide by 14.2 mm deep. The lid is around 18.9 mm square and 1.4 mm tall. The switch travel seems to be somewhere in the region of 4.5 mm.

The switch uses pairs of identical contacts that face each other, similar to the [[PED keyswitch]]. A large block on the slider holds the contacts apart at rest, and when the slider is lowered, the contacts closed. The design is similar to [[Hi-Tek High Profile]], but the contacts are in bays at the sides of the switch, allowing for more than one pair of contacts per switch, something not possible with the Hi-Tek design.

The base is marked with six positions, numbered (when seen from below) anti-clockwise from 2 to 7, two per side. Positions 6 and 7 are the terminals of an SPST switch, and a DPST switch has a second pair of terminals on the opposite side in the 2 and 3 positions. No switch has been seen with terminals in positions 4 and 5, and the slider in the illuminated version only accepts up to two pairs of terminals, one pair per side (these being the only two sides with the separator block moulded in). The empty terminal position can have a rubber [[O-ring]] placed around it for damping.

In the two instances of these switches being found in keyboards, they have crosspoint contacts,<ref name="CP" /><ref name="Bendix" /> while the "ASM MEXICO" illuminated version (found only as unidentified surplus stock) is not crosspoint.

Centre illumination is supported. A small plug is inserted into a chamber in the bottom of the switch, containing two terminals and two lamp terminal receptacles. The lamp can then be inserted into the centre of the switch within the slider.

No alternate action version has been sighted, but a small peg on one of the slider types found in the illuminated version may be there to support a latching arm.