Membrane switch is a set of key functions, indicating components, instrument panel as one of the operating system.It consists of four parts: panel, upper circuit, isolation layer and lower circuit. Press the membrane switch, the contact on the circuit deforms downward, and the electrode plate of the lower circuit contacts conduction, after the finger is released, the contact on the circuit bounces back, the circuit is disconnected, and the circuit triggers a signal.
Technical Parameters of the membrane keypads:
| Electrical Properties: | Working Voltage | Electric Current | Contact Resistance | Insulation Resistance | PET Pressure | Rebound Time | Circuit Resistance | Ink Pressure |
| >25VDC | ≤50mA | 20~150Ω | ≥100MΩ (100VDC） | 2k DVC | ≤6ms | 50Ω,150Ω 350Ω,etc. | 100VDC | |
| Mechanical Properties: | Closed Displacement | Pin Space Standard | Reliability Lifetime | Work Power | Siver Paste Wire Width | |||
0.1~0.2mm (No Tactile) 0.3~0.8mm (Embossed) | 2.54mm（common） 1.0mm(common） 1.27mm | ≥1million times | 180~350G power | ≥0.3mm, Min.Space 0.5mm，Wire burrs ＜⅓， Wire notch＜¼ width. | ||||
| Environmental Properties: | Working Temperature | Storage Temperature | Atmospheric Pressure | |||||
| -20℃ ~ +70℃ | -30℃ ~ +90℃ Moisture 95%±5% | 86~106KPa | / | |||||
| Printing Index: | Print Size Deviation | Print Overlay Deviation | Print Color Deviation | No creases&paint stripping. | ||||
| ±0.20mm | ± 0.1mm/100mm Clear window clean, uniform color. | Within 10% No ink scattering&defective handwriting. | No scratches, pin holes or impurities. | |||||
Product's Specifications:
It was made from PET material.
Silk printing the pantone colors at back side (blue and white color as picture).
Stamping the shape and embossing.
Quality checking on each part.
Laminated the layers.
Packing and shipping.