Contacts
Part of the Shin-Etsu range of keypads is the contact element at the bottom section of each key that makes the actual electrical contact on the PCB or FPC. A range of materials are offered to meet various specific requirements towards switching electronic equipment. In addition to passive contact elements, metals domes are available that include a specific metal click-response.
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| Alpha97 pill | Combination of carbon pill and metal dome | Printed contact DCP | IF metal dome |
| Type | Conductive material | Hardness | Tensile strength | Elongation | Compression set | Resistivity | Contact resistance |
size ∅ | T | |
| JIS K6301 A | JIS K6301 N/mm2 |
JIS K6301 % |
JIS C2123 150º C, 22 hrs % |
Ω.cm | Ω | mm | mm | |||
| DCP | Direct Contact Print carbon silicone ink layer |
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(50) | (9) | (350) | (10) | 4.0 | < 200 50 typ. |
various shapes 2.5 ~ 6.0 |
> 0.03 |
| C40P | carbon silicone rubber pill |  |
65 | 5 | 200 | 18 | 4.0 | < 200 20 typ. |
round 2.5 ~ 5.0 |
0.55 |
| Alpha97 | carbon silicone rubber pill | |
80 | 6.7 | 160 | 36 | 0.7 | < 20 5 typ. |
round 3.0 3.5 4.0 |
0.55 |
| Gold | Au plated Ni pill |  |
(50) | (9) | (350) | (10) | 1.0 • 10-2 | < 2 0.5 typ. |
round 3.0 3.5 4.0 |
0.5 |
| H-flex | Au plated Ni pill |  |
(50) | (9) | (350) | (10) | 1.0 • 10-2 | < 2 0.5 typ. |
round 3.0 |
0.55 |
| Test based on Shin-Etsu standard test on Au plated PCB, 1.0 pitch, track width 0.5 mm |  |
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Tests based on Shin-Etsu standard tests on gold plated PCB, track pitch 1.0 mm, track width 0.5 mm.
| Conductive material | Size ∅ | Contact resistance |
Peak force | stroke |
click ratio |
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mm | Ω | N | mm | % |
| SUS301CSP-H | 4.0 | < 50 | 1.8 ± 0.4 | 0.14 ± 0.05 | 45 ± 10 |
| SUS301CSP-H | 5.0 | < 50 | 1.8 ± 0.4 | 0.18 ± 0.05 | 45 ± 10 |
| SUS301CSP-EH | 5.5 | < 50 | 3.8 ± 0.5 | 0.23 ± 0.05 | 40 ± 10 |
| SUS301CSP-EH Carbon coating | 5.5 | < 100 | 3.9 ± 0.5 | 0.24 ± 0.05 | 40 +10/-15 |
Note:
Every item or numerical value indicated herein is measured by Shin-Etsu and out of guarantee.
Characteristics and graphs are for reference only. Actual resistances and forces are up to the design of substrates and assembly constructions.
More information can be found in the design guides.
The quality of the assembled products is out of guarantee.
Please make sure to review the purpose and conditions of use and practice you own tests.
Industrial ownership like patent doesn't guarantee the usage of products.
