IEVT/Tipro Series TY
“Terminalska tipka Serije TY” (Series TY terminal keyswitch) is a mechanical switch with a fairly typical 1980s profile. The switch contacts and overall design are based on SMK JM-0400 Series. Series TY originated at IEVT and continued by Tipro until the latter organisation discontinued them in favour of Cherry MX.
TY switches are branded “IEVT” on the top.
Series TY switches accept Series Y keycaps.
The following models are listed in the IEVT/Tipro switches and keycaps brochure. A suffix of “/10” (e.g. TY 1/10) denotes a 10° keystem.
The details below carry the caveat that they may be mistranslated or misunderstood.
|Model||Configuration and behaviour|
|TY 1||SPST-NO momentary|
|TY 11||DPST-NO momentary|
|TY 2||SPST-NC momentary|
|TY 22||DPST-NC momentary|
|TY 12||DPST-NO+NC momentary|
|TY 3||SPST-NO alternate action|
|TY 4||SPST-NO momentary with LED|
The specifications below are the correct figures, but the headings may be subject to misinterpretation of the original Croatian and Slovakian text.
4 mm (most models)
3 mm (TY 12)
|Operating force||80±20 cN|
|Operating temperature||−10 to +80 °C|
|Bounce time||< 2 ms|
|Rated life||> 20 × 10⁶ cycles|
|Operating power||< 5 VA|
|Voltage||< 100 V DC|
|Current (breaking)||< 150 mA|
|Contact resistance||< 300 mΩ|
There is only one known example, the keyboard by which IEVT was discovered:
- IEVT/Tipro tipke serije TZ, TY, TC, glave tipk serije Z, Y scanned by Tipro