Technical Information

Keypad Dimensions

• 1 - Typical outside radius 1.0mm to 1.5mm
• 2 - Minimum radius 0.3mm
• 3 - Minimum inside radius 0.2mm
• 4 - Minimum spacing between the edges of a rubber dome and guide hole 1.0mm
• 5 - Guide holes minimum 1.0mm diameter
• 6 - Width of rubber button base typically 2.0mm greater than 'a'
• 7 - Minimum radius for the side of the keytop 0.25mm
• 8 - Minimum radius for the top edges of the keytop 0.2mm

Key Height

• H = Dimensions from keytop to front panel
• S = Key stroke
• H-S > 1.5mm

Key Corner Radius

• R = Corner radius of cut-out
• r = Corner radius of rubber
• 1.0mm < R < 1.25mm
• 0.75mm < r < 1.0mm

Key Clearance

• A & B = Dimensions of front panel cut-out
• a & b = Dimensions of rubber
• A-a > 0.4mm
• B-b = 0.3mm