Conductive carbon pill keypad power silicone buttons

A conductive carbon pill keypad uses a conductive feature beneath the flexible key to interact with the corresponding circuit contact. The silicone button can serve as a power control in a custom interface. The molded button provides the external pressing surface, while the contact placement beneath it must agree with the board layout inside the product.

For a power control, pay attention to the difference between a complete press and a partial touch. The housing should guide the button without holding it in a depressed position. Check the response from an off-center press as well as from the middle, because a tilted key may reach the board differently.

ETOL offers custom keypad manufacture. Define contact resistance, operating travel and switching life for the chosen control assembly, and evaluate the carbon contact together with the circuit and housing.

Handle the underside by its non-contact edges during assembly. Keep oils, loose particles and adhesive away from the conductive area. If the power input becomes intermittent, inspect alignment and mechanical freedom before increasing enclosure pressure, which can preload the key and create a different fault.

Material options

Silicone. Custom formulation and color for the intended contact conditions.

Hardness selection

Silicone: 20–80 Shore A. Check the response from an off-center press as well as from the middle, because a tilted key may reach the board differently.

Custom dimensions

The housing should guide the button without holding it in a depressed position.

Fit & assembly

Define contact resistance, operating travel and switching life for the chosen control assembly, and evaluate the carbon contact together with the circuit and housing.

Use & inspection

If the power input becomes intermittent, inspect alignment and mechanical freedom before increasing enclosure pressure, which can preload the key and create a different fault.

Photos illustrate structure or material only. The molded button provides the external pressing surface, while the contact placement beneath it must agree with the board layout inside the product. ETOL directly manufactures custom-shaped silicone and rubber parts to your requirements.