Dustproof Poly Tactile Dome Switch 3M9448 Silk-printing 10Ω - 500Ω
A membrane switch consists of various layers laminated together. The layers of a basic membrane switch construction include: a membrane overlay, spacer, printer circuit, rear adhesive, and tail filler. Depending on the environment and requirements of the application into which the membrane switch plugs into, the construction can vary. For example, if shielding is necessary, a two-circuit membrane switch design would be a better construction choice.
1.Overlay Materials: The most commonly used base materials are polyester and polycarbonate.
2.Rear Adhesive: 3M 467MP, 3M 468MP, etc.
3.Standard Tolerances: +/-.010 inch.
4.Matching color: Pantone and RAL color matching system.
5.Tail, pin and circuit layout: subject to customers detailed requests.
6.Type of Switch: a.Non tactile
b.graphics
c.Tactile with stainless steel domes
d.Tactile with poly domes on the circuit
7.Notice: We have the capacity to provide you membrane switches with other special
requirements, such as Shielding, Windows/Lens Coating, Embossing, Embedded LEDs,
UV glossy/matte/textured, etc.
Parameters
| Membrane switch parameters | |
| 1.Electrical | |
| (1)Maximum Circuit Rating: | 35V DC,100mA,1W |
| (2)Contact Resistance: | 10Ω~500Ω |
| (3)Insulation Resistance: | 100MΩ at 100V DC |
| (4)Dielectric Withstand: | 250V Rms (50-60Hz 1min) |
| (5)Contact Bounce: | 5ms or less |
| 2.Mechanical | |
| (1)Actuation Force: | Flat type 60g~300g(2~10OZ) |
| Tactile type 150g~400g(6~14OZ) | |
| (2)Switch Stroke: | Flat type 0.1~0.5mm |
| Tactile type 0.6~1.5mm | |
| (3)Life Expectancy: | Flat type Five million closures or more Tactile type one million closures or more |
| 3.Environmental | |
| (1)Operating Temperature: | -40°c~+80°c |
| (2)Storage Temperature: | -40°c~+85°c |
| (3)Humidity: | 40°c,90%~95%,for 240 hours |
Strength:
1, Pressing life-span is over ten hundred thousand times.
2, have the characteristics of the function stabilizes.
3, handle reliably and good tactility feeling.
4, customised design
