019 The general technical performance of tactile switch (D)

The general technical performance of tactile switch (D)
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11. Low Temperature Resistance Testing
Following the test set forth below the sample shall be left in normal temperature and humidity conditions for one hour before measurements are made.
(1) Temperature: -40±2℃;
(2) Time: 96 hour;
(3) Contact resistance: 200mΩ Max. Insulation resistance: 50 MΩ Min.
(4) Water drops shall be removed.
The testing engineer takes 10 samples from each batch and tests them on the fatigue testing machine. The test samples shall meet the following requirements.
(1) There shall be no breakdown.
(2) There shall be no sign of damage mechanically and electrically.

12. Return Force Testing
The sample switch is installed such that the direction of switch operation is vertical and, upon depression of the stem in its center the whole travel distance, the force of the stem to return to its free position shall be measured.
The testing engineer takes 10 samples from each batch and tests them on the fatigue testing machine. The test samples shall meet the following requirements: 50 gf min

13. Heat Resistance Testing
Following the test set forth below the sample shall be left in normal temperature and humidity conditions for one hour before measurements are made.
(1) Temperature: +85±2℃;
(2) Time: 96 hour;
(3) Contact resistance: 200mΩ Max. Insulation resistance: 50 MΩ Min.
The testing engineer takes 10 samples from each batch and tests them on the fatigue testing machine. The test samples shall meet the following requirements.
(1) There shall be no breakdown in 180 ± 50 gf & 250 ± 50 gf, and in travel 0.40 ± 0.20 mm
(2) There shall be no sign of damage mechanically and electrically in 180 ± 50 gf & 250 ± 50 gf, and in travel 0.40 ± 0.20 mm.

All above tests shall be completed by the laboratory of Tiandu R&d Center, and all test data shall be retained for more than 1 year. All tests shall be completed by the laboratory of Tiandu R&d Center, and all test data shall be retained for more than 1 year.


Post time: May-29-2022