Waterproof and dustproofdesign (IP67)
Compact size andcompact structure
Long lifespan andhigh reliability
100% Manufactory
Set up since 2012, our company own the factory, and experienced.
PROFESSIONAL MANUFACTURER OF MICRO SWITCHES
Waterproof and dustproofdesign (IP67)
Compact size andcompact structure
Long lifespan andhigh reliability
Product Quality
Uiled have obtained relevant CCC, CQC, UL, VDE, CE, ENEC enterprise and relevant product certifications.
Sales Market
We have gained a global sales network reaching many countries over North America, South America, Europe, Africa and South East Asia.
After-Sales Service
A complete service network has been established to respond to user requests within 24 hours.
PRODUCTS
The core products include micro switches and travel limit Switch, push button switch, foot switch, toggle switch, AC power socket.
The core products include micro switches and travel limit Switch, push button switch, foot switch, toggle switch, AC power socket.
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ABOUT LEMA
Lema is committed to R&D, production and sales of industrial control electrical switches. The company's core products include micro switches and travel limit Switches, push button switches, foot switches, toggle switches, AC power socket.
After nearly 30 years of steady development, Lema has become a large-scale professional manufacturer of micro switches in China. The company currently covers an area of more than 11,000 square meters.
2000Years
Established in
40+
Exporting countries and regions
10000m2
Factory floor area
60+
Authentication certificate
APPLICATION
Committed to research and development, production, sales of industrial electrical switches and connectors
INDUSTRIAL
AUTOMATION
Industrial automation empowers smart manufacturing with reduced manual labor, higher precision, and greater efficiency.
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Customer recognition is our greatest motivation.
NEWS
Stay updated with the latest developments, product launches, and industry insights.
Toggle Switch Contact Bounce: Causes, Debouncing and Testing
Toggle switch contact bounce is the brief sequence of unwanted make-and-break transitions that can occur as mechanical contacts change state. A person may see one deliberate movement while a fast electronic input detects several edges, which can create duplicate counts, repeated commands or a noisy state transition. Whether bounce matters depends on the receiving circuit and its response time. Confirm behavior at the actual controller input, then use an appropriate hardware or software debounce method; do not assume every toggle switch has the same bounce time. LEMA LT2 toggle-switch examples based on the original product image. Contact bounce is an electrical transition behavior and cannot be judged from the exterior photograph. What happens during contact bounce A mechanical contact does not always move from open to closed in one perfectly clean edge. The moving parts have mass and elasticity; when contact surfaces meet, they can briefly separate and reconnect before settling. On opening, an edge can also include brief transitions depending on the mechanism and measurement circuit. A receiving input may therefore see a short pulse train where an operator intended one state change. All About Circuits' electronics textbook section on contact bounce explains how several transitions can be interpreted as multiple counts by a digital circuit. The University of Texas ECE embedded-systems chapter describes hardware and periodic-sampling approaches, including why the stable interval must be chosen for the actual switch. These sources explain the general mechanism; they do not specify the bounce time or endurance of a particular LEMA model. Do toggle switches bounce? Yes, a toggle switch can produce contact bounce. The external lever style does not make the internal contacts immune. A maintained toggle changes to a...
↗Push Button Contact Blocks: NO, NC, Colors and Compatibility
A push button contact block is the part of an operator assembly that changes one or more electrical contact states when the button moves. Before choosing or replacing one, identify whether the product is genuinely modular or has an integral switching mechanism, then match the contact function, operator family, mounting method, terminal layout and electrical duty. Button color alone does not tell you whether a circuit is normally open or normally closed, and a block that looks similar is not necessarily mechanically or electrically compatible. LEMA PBS product examples based on the original product image. The visible rear mechanisms are product references, not proof of a detachable replacement contact-block system. What a contact block does In a modular industrial control station, the front operator is pressed or turned while one or more contact blocks mounted behind it open or close electrical paths. The blocks may provide normally open (NO), normally closed (NC), changeover or multiple independent contacts, depending on the exact design. A stack can combine several contacts for a control circuit, indicator, interlock input or other documented purpose. Not every push button uses a separate removable contact block. Some products contain a built-in microswitch or an integrated switching assembly. The physical location of terminals at the rear does not establish that the module can be detached, replaced or combined with another operator. First identify the product architecture from a parts drawing or instruction sheet. This distinction matters especially when maintenance staff use “contact block” as a generic name for any rear contact mechanism. Read NO and NC from the unactuated state NO and NC describe the contact condition when the operator is in its specified normal, unactuated state. A...
↗Long-Handle vs Short-Handle Toggle Switch: How to Choose
A long handle toggle switch is not defined by one universal length. Compare the handle projection shown on the exact model drawing, then check whether the operator can reach and move it without hitting a guard, enclosure wall, neighboring control or the user's hand. A longer lever can change hand clearance and the moment applied at the pivot, but it does not by itself prove lower actuation force or better electrical performance. Select by measured geometry, switching function and the manufacturer's documented operating requirements. LEMA toggle-switch examples shown for visual reference. Check the order code and drawing before treating any handle length as a product specification. Original LT1 product image from the product library. The visible handle is a product example; use the dimensioned drawing for exact fit. What “long handle” and “short handle” actually mean Catalogues use terms such as bat handle, short lever, long lever, paddle or extended operator, but the wording is not a consistent measurement system across manufacturers. One supplier may describe the exposed metal lever only; another may include part of the actuator above the bushing. A web listing may also omit the drawing datum or combine several models under one title. For engineering and purchasing, replace the adjective with a dimension: record the distance from the drawing's stated reference surface to the lever end, the panel thickness, mounting hardware and the lever's swept envelope. That measurement prevents a common mismatch. Two switches can both be advertised as “long handle” while one protrudes farther above the panel, has a wider lever, or travels through a different angle. Conversely, a product called “short handle” may still be the better fit when a protective cover or adjacent...
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