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Technical Data for Tactile Domes:
| Contact Configuration | SPST N.O. |
| Switching Voltage | 1 to 75 VDC |
| Switching Capacity | 5 Watts |
| Switching Current | 0.01 to 100ma DC |
| Contact Bounce | <.3ms make>.6ms break |
| Trip Force | Standard forces and also to your spec: +/- 30 grams typical |
| Material | Stainless Steel |
| Plating | Nickel/Silver /Gold |
| Operation Temperature Rating | -45° C to +125° C |
| Storage Temperature Rating | -55° C to +110° C |
| Contact Life- | 6-8.5mm Exceeds 5 million cycles 9-12.5mm Exceeds 5 million cycles 13-25mm Exceeds 1 million cycles |
Test Conditions:
Snap forces are measured at 25C using a Chatillon spring-loaded force gauge. The dome is put on a flat surface (with tiny grooves to allow air to escape) for measurement. A pointed test probe is used and the results after 7 actuations are recorded for each batch of 10000 domes.
Life testing is performed using an in-house built pneumatic test jig which actuates, via a 1.5mm probe, a dome which overtravels by a maximum of 0.2mm to close a polyester membrane switch. The test dome is held in place using 3M 'Superbond' tape and is cycled every 1 second. Our standard test covers twice the rated lifetime so that, for example, 10 million cycles are completed in 3 months. Five domes in every 100000 are tested in this manner. Failure is any mechanical deterioration of the dome - splitting or cracking for example, or a reduction in final actuation force of more than 20%.