Double-Sided Contact Pad(Suitable for all domes except oblong)

     **NOTE**

  • Via hole through the board is suggested for venting if other means are not used
  • Snaptron recommends that the circuit area under the dome be void of solder mask.  The keep out area begins at the outside edge of the outer circuit pad that the dome is positioned on and includes area inside of pads.

This drawing represents one of many possible layouts. Snaptron conveys this information for customer support with the intent that the customer will be responsible for final design of P.C.B. layout.

Metric Domes (in millimeter)

Diameter D I P F
4mm 4.76 3.00 1.70 0.32
4mm (SQ-Series) 4.73 2.71 1.70 0.41
5mm/5.3mm 5.76 4.00 2.03 0.41
6mm/6.3mm 6.76 5.00 2.54 0.41
7mm 8.25 5.45 2.86 0.60
8mm 9.27 6.73 3.20 0.60
8.5mm 9.78 6.98 3.81 0.89
9mm 10.27 7.48 3.81 0.89
10mm 11.28 8.49 4.08 0.89
10mm (SQ-Series) 11.06 6.49 4.08 0.89
12mm 13.27 10.18 4.90 0.89
12mm (SQ-Series) 13.06 7.75 4.90 0.89
12.2mm 13.47 10.38 4.90 0.89
12.7mm 13.97 10.83 4.90 0.89
14.1mm 15.27 12.06 5.70 0.89
16mm
17.27 14.25 6.50 0.89
20.2mm 21.90 18.09 7.00 0.89
25.2mm 26.98 21.55 8.90 1.10

 

Standard Domes (in inches)

Diameter D I P F
.156" .186 .126 .080 .016
.220" .260 .180 .100 .024
.270" .320 .220 .100 .024
.350" .400 .300 .150 .035
.425" .475 .375 .200 .035
.500" .550 .450 .200 .035
.625" .675 .575 .250 .035
.750" .825 .675 .300 .035
1.00" 1.10 .900 .350 .035