Electrical properties | |
---|---|
Tension | 25 VDC max * |
Electricity | 50 mA max * |
Performance | 0,6 W max * |
Contact resistance | < 100 Ohms ** |
Insulation resistance | 5 x 106 Ohms |
Response time | < 20 mS max |
Mechanical properties | |
Dimensional tolerances | +/- 0,2 mm |
Switching force | 2 – 4 N |
Key way | 0,15 – 0,2 mm |
Keyboard thickness | 1,5 mm max |
Radium of rolling the connection cable | > 3 mm |
Service life | |
Without dome | > 4,000,000 operations |
Metal dome | > 1,000,000 operations |
Poliesterdom | > 2,000,000 operations |
Temperature conditions | |
Averting temperature range | - 20 to + 70 oC |
Storage temperature range | - 40 to + 80 oC |
* electrical conditions for optimum service life: 20 VDC, 10 mA, 0.25 W |
** dependent on the length of the lines, resistance of the line: < 8 Ohm for line length 100 mm, width 1 mm |
聚碳酸酯 | Poliester | |
---|---|---|
Thickness | 0.175, 0.375 mm | 0.15, 0.2, 0.28 mm |
Surface treatment | frosted | clear, frosted |
Optical clarity | excellent | very good |
Thixotropy | excellent | acceptable |
Cutting and shaping | excellent | acceptable |
Laser cutting | acceptable | excellent |
Chemical resistance | acceptable | excellent |
Stability in outdoor conditions | acceptable | acceptable |
Resistance to wear and tear | acceptable | excellent |
Service life | 50,000 - 200,000 changeovers* | 1.0 - 5.0 million switches ** |
Thermal stability | excellent | acceptable |
Thermal expansion | acceptable | excellent |