Overlay

Overlay

Membrane keyboard switch is a conductive keypad panel with unique cosmetic design. We offer full range designs of membrane keyboard switches:

‧Flat and all embossed key type with either metal dome or mylar dome.
‧SMT components, LED back light effect, EL back light.
‧Jumper wire.
‧Selective texture with choices of clear, velvet and coloured display window.
‧EMI, RFI, or ESD shielding.
‧Tail termination - either male or female connectors.
‧Waterproof type (IP65).
‧Through -hole type.

Thermoplastic Polyurethane (TPU) refers to general PU elastic material. This material does not cause any damage to human body or the environment. It is the most popular and optimal environment material to replace traditional procedure of membramce switch for now.

Electrical

Maximum Circuit Rating 35V( DC)100mA 1W Contact Resistance 10Ω~500Ω (depending on trace length & material used). Insulation Resistance 100MΩ at 100V DC Dielectric Withstand 250 V Rms (50~60 Hz 1 min.) Contact Bounce ≦5ms Life Expectancy Flat type ≧ Five million colosures Mylar type ≧ 2 million colosures Metal type ≧ 1 million colosures

Mechanical

Actuation Force Flat type = 60 to 300 g (2 to 10 oz) actile type = 180 to 400 g (6 to 14 oz) Switch Stroke Flat type = 0.1 to 0.5mm Tactile type = 0.6 to 1.5mm

Environmental

Operation Temperature Flat/Metal dome: -40 °C to +80 °C Poly dome: -20 °C to +55 °C Storage Temperature Flat/Metal dome: -40 °C to +85 °C Poly dome: -40 °C to +60 °C Humidity 40 °C , 90% ~ 95% for 240 hours Vibration 20 G's0 max(10-200 Hz、MIL-STD-202、M204、Condition B)