# Through-hole slide switch, miniature SPDT A miniature through-hole SPDT slide switch, C&K's OS series OS102011. It has a steel shell over a phenolic base, a square actuator through a slot in the shell, three terminals in a row, and a snap-in leg at each end. MS2Q stands upright with the actuator on top. MA1Q is the right-angle version: the actuator comes out of the shell's front, parallel to the board. The origin is at terminal 2, on the board's top face (the XY plane). The terminals and legs lie along X. The right-angle actuator points along -Y. `kind` is the type. `position` is where the actuator sits: positions 1 and 2 are the travel apart, centred on terminal 2 (position 1 connects terminals 1-2, position 2 connects 2-3). | Type | Parts | Shell (long x wide/deep x high) | Actuator | Base's lower edge | |---|---|---|---|---| | MS2Q | OS102011MS2QN1, MS2QN1C, MS2QS1, MS2QS1C | 8.6 x 4.3 x 4.7 | 2.0 square, 4.0 above the shell | 4.0 below the shell's top (0.7 above the board) | | MA1Q | OS102011MA1QN1, MA1QN1C, MA1QS1, MA1QS1C | 8.6 x 4.4 x 4.7 | 2.0 square, 4.0 out of the front, its axis 2.6 above the board | 3.9 below the shell's top (0.8 above the board) | N1 parts are non-shorting and S1 shorting. A trailing C means a high-temperature actuator. All four are the same size. For both types: - The actuator travel is 2.0. - Terminals 1, 2 and 3 are 2.0 apart, 0.5 wide and 0.3 thick. - The legs are 0.4 thick and 1.2 wide, with barbs 1.5 wide, and are 8.2 apart. - The terminals and legs reach 2.8 below the board. The vertical type's shell top is 7.5 above the tips. - PC mounting: the terminals go in Ø0.8 holes, and the legs in Ø1.5 holes, 2.1 from terminals 1 and 3. ## Source C&K, *OS Series, Miniature Slide Switches*, dated 8 aug 17, catalogue pages I-37 to I-43, from the copy at datasheet.lcsc.com (, LCSC part C221829; C&K's own site isn't used). Dimensions are in inches (mm); the mm values are used here. - Page I-37, OS102011MS2QN1: shell .339 (8,60) x .169 (4,30), .185 (4,70) high; actuator .079 (2,00) square, .157 (4,00) above the shell; the base .157 (4,00) below the shell's top; shell top to the tips .295 (7,50); terminals .079 (2,00) apart, .020 (0,50) wide, .012 (0,30) thick; legs .016 (0,40) thick and .047 (1,20) wide, barbs .059 (1,50); tips .110 (2,80) below; travel .079 (2,00). PC mounting: .323 (8,20), .083 (2,10), 3X Ø.031 (0,80), 2X Ø.059 (1,50). - Page I-42, OS102011MA1QN1: shell .339 (8,60) long, .173 (4,40) deep, .185 (4,70) high; actuator .079 (2,00) square, .157 (4,00) out of the shell, its axis .102 (2,60) above the board; the base .154 (3,90) below the shell's top; terminals, legs, travel and PC mounting as on I-37. - Page I-37, Materials: base phenolic resin; actuator POM, black (high temperature: PA46, black); housing plate SPCC, tin plated (Ni plated for the RoHS-compatible C parts); terminals brass, silver plated. The sheet gives no weight. **Proportions, for looks only.** The drawings don't dimension the following: - The shell's sheet thickness, 0.4, as the legs'. - Where the barb sits on the leg: from 0.4 to 1.4 below the board. - The V notch in the actuator's end, 0.6 wide and deep. - The shell is drawn as plain plates: on the vertical type the top, the long sides down to the base's lower edge, and the end walls down to the board; on the right-angle type the top, the front (with the slot) and the end walls. The slot is the actuator plus its travel long. Materials follow the sheet: the shell sheet steel (`steel-c10`), the base phenolic (`bakelite`), the actuator black POM (`pom-copolymer`), and the terminals brass (`brass`), silver coloured. **Mass check:** the sheet states no weight. As modelled, MS2Q is 0.41 g shell + 0.13 g base + 0.02 g actuator + 0.01 g terminals = 0.57 g, and MA1Q is 0.52 g. ## Catalogue models The old `SW Slide SPDT Straight CK OS102011MS2Q` and `SW Slide SPDT Angled CK OS102011MA1Q` models name these exact parts, so they map to MS2Q and MA1Q. They were measured on the reference models (2026-11-06): | | Old models | C&K drawing | |---|---|---| | MS2Q shell | 8.6 x 4.3 x 4.7 | 8.6 x 4.3 x 4.7 | | MS2Q actuator | 2.0 square, 4.0 above the shell, a V notch | 2.0 square, 4.0 above the shell | | MS2Q base | 0.7 above the board, with four feet down to 0.3 | 0.7 above the board | | MA1Q shell | 8.6 x 4.4 x 4.7 | 8.6 x 4.4 x 4.7 | | MA1Q actuator | 2.0 square, 4.0 out, axis 2.6 above the board | 2.0 square, 4.0 out, axis 2.6 | | MA1Q base | 0.8 above the board | 0.8 above the board | | Terminals | 0.5 x 0.3, 2.0 apart, 2.8 below | 0.5 x 0.3, 2.0 apart, 2.8 below | | Legs | 0.4 thick, 8.2 apart, up to 1.07 wide, narrowing to 0.59 at the tip | 0.4 thick, 8.2 apart, 1.2 wide, barbs 1.5 | | Actuator position | between terminals 1 and 2 (position 1) | drawn in position 2 | The family's other switches (DIP switches, tactile switches and other makers' switches) are other parts. See `COVERAGE.md`.