C&K Components has enhanced its KMT 0X2 series of miniature tactile switches, which is now claimed to provide an operating life of one million cycles. The small tactile switches with an IP68-rated sealing are said to be suitable for mobile electronic devices that require a longer lifetime for more frequently-used buttons, such as home and gaming keys. The switches are functional under water for a minimum of 5hr at a depth of 2m and are resistant to stringent conformal polymer coatings, including particle chemical vapour, parylene, which is used for coating PCBs. The RoHS-compliant and halogen-free switches measure 3.6x2.6mm with a height of 0.65mm, including the actuator. The single pole, single throw, normally-open switches are constructed with silver plating and are available with three operating forces: one, 1.6, and 2.3N, with maximum overload of 10N. The tactile switches feature a maximum power rating of 0.5VA and a voltage range of 20mV to 32V DC with a current rating of one to 50mA. The switches operate from -40 to +85°C and are suitable for consumer electronics and medical devices, such as hearing aids, mobile phones, MP3 accessories and Bluetooth headsets.
