Characteristics of silicone rubber
Overview | Applications and properties | Design Considerations | Types | Characteristics of silicone rubber
| UL Flammability Rating | 94HB |
| Specific Gravity at 25C | 1.1 - 1.4 |
| Durometer (Shore A) | 40 - 80 +/- 5 (Typical= 60+/-5) |
| Tensile Strength (Kg/cm2) | 55 - 75 |
| Compression Set % | 11 - 22 |
| Insulation Breakdown | 26k V/mm |
| Volume Resistivity | 3x10 to 14th power - 10 to 15th power |
| Key Stroke | 0.25 - 5.0 mm |
| Actuation Force | 20 - 350 grams |
| Operating Life | 1 million actuations (typical) |
| Operating Temperature | -30 - +180°C |
| Storage Temperature | -42 -+250°C |
| Contact Resistance | <200 Ohms |
| Insulation Resistance @ 500VDC | >100 MOhms |
| Contact Bounce | <12 msec |
| Contact Rating | 30 mA @ 12V DC .5 sec. |
| Dielectric Strength | >1 min. @ 500V RMS |
Note: These general electrical specifications are based on standard silicone rubber overlays with conductive carbon pills. For particular applications or specific requirements please contact GGI International™.
| Dimension mm (inches) | Tolerances (+/-) mm (inches) |
|---|---|
| 0.0 - 10.0 0.000 - 0.394 |
0.10 mm 0.004 |
| 10.1 - 20.0 0.395 - 0.787 |
0.15 mm 0.006 |
| 20.1 - 40.0 0.788 - 1.575 |
0.20 mm 0.008 |
| 40.1 - 63.0 1.576 - 2.480 |
0.25 mm 0.010 |
| 63.1 - 100.0 2.481 - 3.938 |
0.35 mm 0.014 |
| 100.1 - 160.0 3.939 - 6.300 |
0.40 mm 0.016 |
| 160.1 and up 6.300 and up |
0.3% |
Since silicone is a highly elastic material, it is very important to take into account the variations of tolerances in the manufacturing process of the keypads.
» Download Elastomer keypad pdf spec sheet
Overview | Applications and properties | Design Considerations | Types | Characteristics of silicone rubber