Three type Membrane Switch Electrical and Mechanical Specifications

A. Membrane Switch Electrical
1. Configuration – momentary SPST normally open
2. Current Rating – 30V – 100MA to 120V – 10MA maximum
3. Breakdown – 220 V RMS
4. Closed – 100 OHMS typical contact resistance
5. Open – 10 MEG OHMS contact resistance minimum
6. Capacitance – 30 Picofarads
7. keypads tactile Life :
a. Flat Switch – 5 million cycles
b. Domed (embossed) overlay layer – 5 million cycles
c. Domed circuit layer– 1 million cycles
d. Metal Dome – 0.8 million cycles
8. Contacts – Silver to Silver. (Other contacts available)
B. Membrane keypad Mechanical
Flat Touch Tactile keypads
1. Travel - .005” to .012” .015” to .030”
2. Contact - 5 to 10 milliseconds bounce 10 to 30 milliseconds bounce
3. Actuation - 4 to 24 ounces force 6 to 32 ounces force
4. Life - 1 million cycles (Domed)
5. Assembly - .040” typical thickness .030” to .048” typical thickness
C. Membrane keyboard Environmental
1. Operating Temperature 0o C to 85o C
a. 70o C for Standard Dome
b. 85o C for High Temp Dome
2. Storage Temperature -40o C to 85o C
3. Salt Spray: Based on MIL-STD-202 Method 101. Test conditions 5% Salt. [Solution 95o F for 96 hours.
4. Chemical resistance: If Permacoated, resistance to cleaning agents, hydrocarbons and chlorinated ammonia.
5. Thermal cycling: 0o C to 85o C – 1000 cycles
6. Mechanical shock: No Closure 25 g’s
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