1. Product profile

This keypad group is made of excellent zinc and aluminum alloy with its surface plated by copper,

nickel and chromium. It has good corrosion resistance performance,

also it can prevent outside force from destroying.

In order to ensure excellent transmission signal capacity,

plug board used double-faced gold-plated board.

2. Standards

GB/T 15279-94   technical specifications for automatic phone

YDN 109-1998    (part 4) technical requirements and testing method for IC card telephone.

GB 9035      

3. Environmental requirement

Working temperature: -25~55℃

Relative humidity: 10%~95%

Atmospheric pressure: 86~106KPa

4. Technical date

Contact resistance:     <100 Ohm    

key-press pressure: 0.5~1.8N

Insulation resistance:   >50M ohm

key-press distance: 2.5±0.5mm

Capability to withstand voltage: 500V/1min 

Service life: 1 million times