Membrane keypads / operating foils
Membrane keypads - the robust all-rounders
Membrane keypads are the most commonly used input elements in equipment and apparatus engineering.
Whether as a narrow control panel with two keys or as a complete user interface with a large number of keys and additional elements: the robustness, the low installation depth and the great individual design freedom still make them the first choice.
The advantages of membrane keyboards are the almost unlimited freedom of design. The designer of a device can freely determine the number of keys, the position of the keys and the shape of the keys.
In addition, there is the equally free choice of the graphic design of the user interface.
With or without tactile feedback, rigid or flexible - depending on the application, membrane keyboards can offer exactly the features that are desired.
Numerous additional features ensure maximum adaptability and application possibilities.
Our range includes various surface treatments such as waterproof versions, silicone keys, antibacterial coatings, shielding against electromagnetic interference (radio interference) and electrostatic discharge, gold-plated contacts and a wide variety of connection cables with or without plugs / housings.
|Electrical max. Limits||35V DC / 100mA / 1W|
|Contact contact resistance||10Ohm - 500Ohm|
|Insulation resistance||>100M Ohm bei 100V|
|Dielectric strength||250V Rms (50 - 60 Hz / 1min.)|
Expected life of keys
|Flat keys >5mil
Tactile buttons > 1 mil
|Required compressive force||Flat keys = 57 - 284 gr. (2 - 10 oz)
Tactile keys = 170 - 397 gr. (6 - 14 oz)
|Switching height||Flat keys = 0.1 - 0.5mm
Tactile keys = 0.6 - 1.5mm
|Operating temperature||Flat/metal dome = -20°C to +80°C
Polyamide dome = -20°C to +55°C
|Storage temperature||Flat/metal tip = -40°C to +80°C
Polyamide dome = -40°C to +60°C
|Humidity||40°C at 90% rel. humidity for 240h|
|Concussion / Shock||20 G (max.)
(10-200 Hz, MIL-STD-202, M204, Cond. B)