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UL Certification Two Button Membrane Keyboard Pcb For Power Control Module
Product Details:
| Place of Origin: | DongGuan of China |
| Brand Name: | Taida |
| Certification: | ISO9001,SGS,ROHS,REACH,UL |
| Model Number: | 20241031-04 |
Payment & Shipping Terms:
| Minimum Order Quantity: | 100 pcs |
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| Price: | communication |
| Packaging Details: | PE bags first and Foam in Carton and etc |
| Delivery Time: | 4-5 days for Samples making ;10-13 days for Batch goods |
| Payment Terms: | Western Union, T/T,PAYPAL |
| Supply Ability: | 35000 +pcs +a Month |
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Detail Information |
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| Material: | Polyester Or Polycarbonate Or Other Request | Color: | Pantone, RAL CMYK ,RGB Or Samples |
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| Adhesive: | 3M Adheisve Or Other | Button Type: | Metal Snap Dome |
| Application: | Power Control Module | Circuit Option: | FFC Flexible Ribbon Cable |
| LED Color: | Blue ,white ,red Or Other Request | LED Type: | 0603or0805 |
| Connector Type: | Female Connector | Shape: | Custom Design |
| Highlight: | Power Control Module Membrane Keyboard Pcb,UL Certification Membrane Keyboard Pcb,Two Button Membrane Keyboard Pcb |
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Product Description
UL Certification Two Button Membrane Keyboard Pcb For Power Control Module
When it comes to membrane switches used in household and commercial appliances, UL (Underwriters Laboratories) certification is an important safety and compliance consideration. UL certification ensures that the membrane switch design and manufacturing meet rigorous safety standards. Here's a breakdown of UL certification for membrane switches:
Key Features of the PCB
- Printed Circuits: The circuits are often printed using conductive inks or metal traces.
- Switching Mechanism: When a key is pressed, the top layer makes contact with the bottom layer, completing a circuit and sending a signal.
- Conductive Traces: The PCB contains conductive pathways that connect the key switches to the controller, allowing for the detection of key presses.
Overview of Membrane Keyboards
- Structure: Membrane keyboards consist of three main layers:
- Bottom Layer: This is the PCB where the electrical contacts are located.
- Top Layer: The topmost layer has printed symbols for each key and is usually made of a flexible plastic material.
- Spacer Layer: This layer creates a gap between the top and bottom layers and has holes aligned with the keys.
Advantages
- Compact Design: Their slim profile makes them suitable for devices with limited space.
- Easy to Clean: The flat surface of a membrane keyboard is easier to clean compared to traditional keyboards.
- Cost-Effective: Membrane keyboards are generally cheaper to produce than mechanical keyboards.
Disadvantages
- Tactile Feedback: Membrane keyboards often lack the tactile feedback provided by mechanical switches.
- Durability: They may wear out faster than mechanical keyboards, especially with heavy use.
Applications
- Consumer Electronics: Used in remote controls, microwaves, and appliances.
- Industrial Use: Common in machinery control panels due to their durability and ease of cleaning.
- Medical Devices: Often found in various medical equipment due to their hygienic surfaces.
Membrane Switch specification:
| Overlay material ---For front or face overlay | ||||||||
| Polyester | Polycarbonate | |||||||
1 Highly versatile for embossing | 1 wide range of the surface finishes and thicknesses | |||||||
| Embossing --- Graphic overlay or up circuit can be embossed in order to insert metal stainless steel domes for good tactile when press .Leave space for mechanical keys and provide tactile indications | ||||||||
| Pedestal embossing | Rim embossing | Pillow embossing | Dim embossing | |||||
| Windows or LCD --- For display functions | ||||||||
| Printed colors windows such like red ,black and so on | Transparent finishes windows | |||||||
| Keys | ||||||||
| Tactile Keys :witch metal domes or Poly domes ,Metal dome with different diameter and pressure kinds | Non-tactile keys: printed silver spot on the circuit | |||||||
| LEDs ---Miniature LEDs ,LED colors :white ,Green ,Red ,Blue ,Yellow ,Orange and others | ||||||||
| EL and Sensors or inductors --- EL can be light any place where where you like ,and sensors can be used as LEDs | ||||||||
| Cables --- is extension of circuit and communication with your device | ||||||||
| Screen printing conductive silver cable | Copper plated cable /Polyimide or FPC | PCB cable | ||||||
| Types of connector --- 1 Zero insertion force(ZIF) with 0.5MM ,1.0MM,1.25MM pitch ;2 Female connector with 2.54MM pitch; 3 Male connector | ||||||||
| Shielding --- For protection function | ||||||||
| Gasket seal/Waterproof :protect the conductors against from the humidity and splashes | EMI/RFI/ESD Shielding: use an Aluminum foil shielding /clear ITO electrical conductive polyester to protect | |||||||
| Rear Adhesive --- Mostly use the 3M double-side mounting glue brand of USA. Also accepted others such like Lohmann and others | ||||||||
| Back plate --- Use in Aluminum ,Polycarbonate ,Acrylic Or PMMA | ||||||||
| Matching color --- PMS or RAL Is best ,CMYK or RGB also can be ok if you can supply PMS Or RAL | ||||||||
| Standard Tolerances :+/-0.2MM | ||||||||
Membrane switch Performance Index:
Electrical properties
| Operating voltage | ≤ 50VDC |
| Operating Current | ≤ 100mA |
| contact resistance | 0.5 ~ 10Ω |
| Insulation resistance | ≥ 100MΩ (100VDC) |
| the substrates withstand voltage | 2kDVC |
| rebound time | ≤ 6ms |
| loop resistance | 50Ω, 150Ω, 350Ω third gear, or user needs identified |
| insulating ink withstand voltage | 100VDC |
Mechanical behavior
| reliability of service life | > 1 million times |
| closed displacement | 0.1 ~ 0.4mm (tactile) 0.4 ~ 1.0mm |
| Kin standard for force | 15 ~ 750g force |
| conductive silver paste migration | in 55 ° C, a temperature of 90%, after 56 hours, the second-tier of 10MΩ/50VDC |
| Silver online no oxidation, no impurities | |
| Pastes linewidth ≥ 0.3mm, the minimum interval of 0.3mm, line burr <1/3, the line gap <1/4 linewidth | |
| pin spacing standard 2.54 2.50 1.27 1.25mm | |
| the pinout anti curvature, d = 10mm Ganggun pressure roll 80 times line constantly. | |
Environmental performance
| Operating Temperature | 20 °C ~ +70 °C |
| storage temperature | -40 ° C to +85 ° C temperature 95% ± 5% |
| large gas pressure | 86 ~ 106KPa |
Printing indicators
| printing size deviation ± 0.10mm, appearance sideline unclear compiled difference±0.1mm |
| chromatic deviation ± 0.11mm/100mm, the insulating ink covering all Silver Line |
| ink scattered, writing incomplete |
| color difference is not more than two |
| shall not creased, paint stripping |
| transparent transparent window cleaning, uniform color, no scratches, pinholes, impurities. |
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