4 embossed button keyboard membrane switch panel

Specifications

Maximum circuit rating:  35v DC, 100 milliamps, 1 watt

Contact Resistance:       10-500W    (depending on trace  
                                               length and material used)

Insulation Resistance:    100 MW at 100 v

Dielectric Withstand:        250v RMS (50- 60 Hz  1 minute)

Contact Bounce:                <5.1 ms

Life Expectancy:                 Flat type >Five million closures

                                               Tactile type > One million closures

MECHANICAL:

Actuation Force:                Flat type = 57 - 284 g

                                               Tactile type  = 170 -397 g

Switch Travel:                    Flat type = 0.1 to 0.5 mm

                                               Tactile type = 0.6 to 1.5 mm

ENVIRONMENTAL:

Operating temperature:   -401C to +801 C

Storage temperature:       -401 C to +851 C

Humidity:                             401 C, 90% - 95% for 240 hours

Vibration:                              20 Gs max. (10-200 Hz,  
                                                MIL-STD-202, Condition B)

My factory,