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Silicon Rubber Keypads
Silicon Rubber Keypads
Silicon Rubber Keypads are incorporating a moulded silicon layer which sits on a PCB assembled with snap dome switches. The basic specifications are similar to the snap dome keyboards and the main difference is that the overlay is made of silicon rubber in place of polyester. In order to get the best cost benefit ratio for silicon rubber keypads, off takes should be relatively high (> 10000 nos per annum). This is because a die mould is required for achieving the emboss and shape of the silicon layer.
Electrical
- Contact Arrangement: SPST Normally Open
- Current / Voltage Rating: 10 mA at 24 VDC (max) in to resistive load only
- Contact Resistance: Compatible with MOS, TTL & DTL Circuits
- Contact Bounce: Less than 10 milliseconds at make & 20 milliseconds at break
- Operating Temperature: -20ºC to + 65ºC
- Key Travel: 380 microns
- Life expectancy: One million to Three million operations
- Operating Temperature: -20 deg to 65 deg centigrade
- Humidity: 95% RH at 40ºC
- Base: Glass Epoxy PCB FR4 Grade in thickness ranging from 0.4 mm to 3.2 mm
- Plating: Bright Acid Tin; Nickel, Gold over Nickel
- Adhesives: Industrial Grade from 3M , Avery Dennision
- Overlays: Silicon Rubber
- Gold plated contacts for superior switch performance
- Industrial grade adhesives used to withstand harsh environmental factors
- Silicon Rubber Overlay used to withstand harsh environment
- Overlay legends can be printed on keys as per Customer's requirements
- Can accomodate LEDs / Components thus saving space inside the equipment
