Four working parameters of membrane switch keyboard

Membrane Switches Electrical properties

"Working voltage amp;le;50V(DC)

"Working current amp;le;100mA

°Contact resistance: 0.5~10Ω

"Insulation resistance amp;ge;100MΩ (100V/DC)

"Raw material withstand voltage: 2kV (DC)

"Dome rebound time amp;le;6ms

"Loop resistance: 50Ω, 150Ω, 350Ω or resistance value according to user needs.

"Insulating ink withstand voltage: 100V/DC

Membrane keypad Mechanical behavior

"Reliability and service life gt; 1 million times

°Close position offset: 0.1~0.4mm (non-touch type) 0.4~1.0mm (touch type)

"Key standard working force: 15~750g force

"Migration of conductive silver paste: after 56 hours at a temperature of 55°C and a humidity of 90%, between the two wires is

10MΩ/50VDC

"No oxidation or impurities on the silver paste line

"Silver paste line width ≥ 0.3mm, minimum interval 0.3mm, circuit burrs <1/3, circuit gap <1/4 line width

"The standard for pin spacing of tail circuit is: 2.54mm 1.27mm 1mm 0.5mm

"The resistance to curvature of the tail lead wire is used to roll the circuit continuously with d=10mm steel rod for 80 times.

Membrane keyboard Environmental performance

"Working temperature: -20�桫+70

"Storage temperature: -40�桫+85" temperature 95%±5%

"Air pressure: 86"106KPa

Screen Printing standard

"Print size deviation ±0.10mm, unclear outline deviation±0.1mm

"Silk screen printing color deviation ± 0.11mm/100mm, the insulating ink completely covers the silver paste circuit

"No ink scattered, no incomplete font

"The color difference cannot be greater than the second level

"No creases, no ink drop

"The transparent window is transparent and clean, the color is uniform, and there should be no scratches, pinholes, and

impurities.