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OVERVIEW TECHNICAL

OVERVIEW

Membrane Keypads and Membrane Keyboard Manufacture

TECHNICAL

Electrical Properties

Electrical Properties of Membrane Keypads, Membrane Keyboards and Membrane Switches:

	Metal Dome Tactile	Non-Tactile	Polydome
Contact bounce time	<10ms	<3ms	<20ms
Typical closed switch loop resistance	≤ 100 Ω	≤ 100 Ω	≤ 100 Ω
Closed switch loop resistance	≤ 5 k Ω	≤ 5 kΩ	≤ 5k Ω
Insulation resistance
With crossover	≥ 0,1M Ω	≥ 0,1M Ω	≥ 0,1 MΩ
Without crossover	≥ 10 MΩ	≥ 10 MΩ	≥ 10 MΩ
Operating voltage (switched)	Min. 0.5V Max. 30V	Min. 0.5V Max. 30V	Min. 0.5V Max. 30V
Operating current (switched)	≤ 50mA	≤ 50mA	≤ 50mA
Operating power (switched)	Max. 1W	Max. 1W	Max. 1W

Environmental Properties

Environmental Properties of membrane keypads, membrane Keyboards and Membrane Switches:

	Metal Dome Tactile	Non-Tactile	Polydome Overlay
Storage temperature	-40◦C to 80◦C	-40◦C to 80◦C	-30◦C to 50◦C
Operating temperature	-20◦C to 70◦C	-20◦C to 70◦C	0◦C to 40◦C
Ingress protection		Can be sealed to IP67, subject to design
UV resistance		UV resistant materials can be specified

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