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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MEDICAL FACILITIES
TEXTILE FIELD
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Customer recognition is our greatest motivation.
NEWS
Stay updated with the latest developments, product launches, and industry insights.
SPDT Switch Symbol, Terminal Logic and Schematic Guide
spdt switch symbol became a priority because Google Search Console already shows real impressions for this topic on LEMA. That signal indicates an existing audience, but the previous site coverage did not fully match the question. This guide turns the query into a practical selection, integration and purchasing workflow for equipment designers, panel builders, maintenance teams and industrial buyers. The SPDT switch symbol shows one moving common contact that can connect to either of two stationary contacts. It describes electrical logic, not the physical view of a real switch. A schematic may show the normal or de-energized state according to its drafting convention, while the rear of a product can mirror what a front-view assumption suggests. Label the wires COM, NO and NC—or common, throw A and throw B—only after checking the manufacturer diagram and continuity. SPDT can select signals, reverse logic, provide alternate outputs or create an NO/NC pair for a controller input. Application view showing practical integration points for spdt switch symbol. What spdt switch symbol means in a real design A useful specification begins with behavior, not a catalogue photo. Write down what moves, what the operator or machine is trying to achieve, when the electrical state must change, and what should happen if a conductor opens or the device fails to reset. Separate the field device from the controller logic: a switch reports or commands a state, while the relay, PLC or control circuit decides how the machine responds. Similar product families often contain several contact arrangements, actuator styles, terminal forms and mounting versions. The family name helps discovery but does not define a production part. Use the complete model suffix, revision-controlled drawing and terminal diagram....
↗Toggle Switch Hole Size and Panel Mounting Guide
toggle switch hole size became a priority because Google Search Console already shows real impressions for this topic on LEMA. That signal indicates an existing audience, but the previous site coverage did not fully match the question. This guide turns the query into a practical selection, integration and purchasing workflow for equipment designers, panel builders, maintenance teams and industrial buyers. Toggle switch hole size is not a universal number. The required opening follows the bushing diameter or snap-in body, anti-rotation feature, panel thickness, washer stack and permitted tolerance of the exact model. A nominal thread designation is not a finished cutout instruction. Use the supplier drawing, measure approved samples, and make a trial coupon in the real panel material and coating stack. Check rear clearance for terminals and wiring, lever clearance at every position, and tool access for the mounting nut. For sealed models, the hole edge and gasket compression are part of the ingress path. Application view showing practical integration points for toggle switch hole size. What toggle switch hole size means in a real design A useful specification begins with behavior, not a catalogue photo. Write down what moves, what the operator or machine is trying to achieve, when the electrical state must change, and what should happen if a conductor opens or the device fails to reset. Separate the field device from the controller logic: a switch reports or commands a state, while the relay, PLC or control circuit decides how the machine responds. Similar product families often contain several contact arrangements, actuator styles, terminal forms and mounting versions. The family name helps discovery but does not define a production part. Use the complete model suffix, revision-controlled...
↗Toggle Switch Mechanism: How It Works and How to Select One
toggle switch mechanism became a priority because Google Search Console already shows real impressions for this topic on LEMA. That signal indicates an existing audience, but the previous site coverage did not fully match the question. This guide turns the query into a practical selection, integration and purchasing workflow for equipment designers, panel builders, maintenance teams and industrial buyers. A toggle switch mechanism uses the lever to move or snap internal contacts between stable or spring-return positions. The pole count tells how many separate circuits are controlled; the throw count tells how many paths each pole can select. ON-OFF, ON-ON and ON-OFF-ON labels describe stable positions, while parentheses or a specific datasheet notation may indicate momentary positions. The snap action can produce a quick electrical transition even when the operator moves the lever slowly. Selection must join the contact function to the actual panel geometry, load, environmental seal and human interface. Application view showing practical integration points for toggle switch mechanism. What toggle switch mechanism means in a real design A useful specification begins with behavior, not a catalogue photo. Write down what moves, what the operator or machine is trying to achieve, when the electrical state must change, and what should happen if a conductor opens or the device fails to reset. Separate the field device from the controller logic: a switch reports or commands a state, while the relay, PLC or control circuit decides how the machine responds. Similar product families often contain several contact arrangements, actuator styles, terminal forms and mounting versions. The family name helps discovery but does not define a production part. Use the complete model suffix, revision-controlled drawing and terminal diagram. If any selection...
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