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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AC Power Inlet Fuse Sizing for OEM Equipment
An AC power inlet fuse cannot be selected from the inlet current rating or appliance wattage alone. Start with the equipment’s maximum steady input current at the lowest permitted supply voltage, then evaluate startup inrush, abnormal-load behavior, conductor capacity, fuse time-current curve, voltage rating, breaking capacity, ambient temperature, holder rating and applicable equipment standard. The selected fuse must carry normal operation without nuisance opening while interrupting defined faults safely. A licensed or otherwise qualified designer must confirm the final protective scheme. This guide provides an OEM selection process for a fused AC inlet. It does not prescribe a universal multiplier or a fuse value for a specific machine. LEMA IPZ-series images are product references only; the exact inlet, fuse holder and fuse must be checked as a coordinated assembly. Inputs required before choosing a fuse Design inputWhy it mattersEvidence to collect Supply voltage and frequency rangeChanges operating current and must remain within fuse voltage ratingEquipment input specification Maximum steady input currentEstablishes the normal thermal loadWorst-case measurement and calculation Startup or inrush waveformMay open a fast fuse despite acceptable steady currentPeak current, duration, repetition and temperature Fault current availableMust not exceed the fuse’s interrupting capabilityInstallation or supply-system study Internal conductor and component limitsThe fuse must protect the intended weak pointsWire, PCB, switch, filter and load ratings Ambient and enclosure temperatureChanges fuse carrying capacity and holder heatingWorst-case thermal test Applicable standard and approvalDefines construction, spacing, testing and replacement markingCompliance plan and certified component records If any of these inputs is unknown, the correct action is to measure or obtain it, not to increase the fuse rating until nuisance opening stops. An oversized fuse may leave the cord, inlet, switch, filter or internal...
↗Push Button Switch Symbols: NO, NC and Illuminated Types
A push button switch symbol combines two separate ideas: the actuator that a person presses and the electrical contact state that changes. Read the contact in its normal, unactuated and de-energized condition unless the drawing states otherwise. A normally open contact is open at rest and closes when actuated; a normally closed contact is closed at rest and opens when actuated. An illuminated push button also has a lamp or LED circuit, which must be shown and wired separately from the contact circuit. This guide explains how engineers, panel builders and buyers should interpret NO, NC, changeover, maintained, momentary and illuminated push-button symbols. It does not replace the symbol legend, applicable drawing standard or terminal diagram for the exact product. Common push-button symbol meanings Drawing elementMeaning at normal stateChange when pressedTypical verification NO make contactCurrent path is openContact closesCOM–NO continuity appears NC break contactCurrent path is closedContact opensCOM–NC continuity disappears Changeover contactCOM is connected to NCCOM transfers to NOMeter both paths in both states Momentary actuatorReturns when releasedOperates only while force is appliedRelease test through full travel Maintained actuatorRemains in selected stateRequires another action to resetOperate and reset according to drawing Lamp or LEDIndependent indicator circuitIlluminates when its supply is presentCheck rated voltage and LED polarity Graphic details vary among IEC, ANSI and company-specific drawing systems. The project legend governs the drawing. The functional questions remain the same: what is the normal state, what mechanical action causes transfer, which terminals belong to each contact, and what returns the device to normal? LEMA PBS-001 product reference. A product photograph shows construction, while the schematic symbol and terminal drawing define electrical behavior. Start from the normal state “Normal” usually means the device...
↗Single-Pedal vs Dual-Pedal Foot Switch
A single-pedal foot switch is usually the clearer choice when an operator needs one deliberate command. A dual-pedal foot switch is appropriate when two distinct commands must remain available at the same workstation, such as raise/lower or clamp/release. Pedal count alone does not make either design safer. The machine risk assessment, control logic, guarding, pedal spacing, operating force, cable arrangement and validation determine whether the selected control is suitable. For purchasing, define what each pedal must do in every machine state before choosing the enclosure. This guide compares single- and dual-pedal layouts for industrial and OEM equipment. It uses LEMA LF-series product shapes as real construction references, but it does not assign an unverified safety function, ingress rating or electrical rating to a photographed model. Always confirm the exact ordering code, drawing and test record. Single pedal versus dual pedal at a glance Decision pointSingle pedalDual pedalWhat to verify Number of commandsOne command or one hold-to-run functionTwo clearly separated commandsMachine operating narrative and I/O list Operator choiceLower selection burdenRequires reliable left/right or front/rear identificationPedal spacing, labels and usability trial Control contactsOne contact set or one control channelIndependent contacts or circuits may be requiredExact schematic and continuity test Cable and connectorUsually fewer conductorsMay need separate returns, commons or connector pinsHarness drawing and connector pinout Failure analysisOne actuator to diagnoseCross-wiring and command confusion must be consideredFMEA, commissioning and fault tests Best fitStart, jog, enable or one-direction requestTwo-direction or two-stage operator requestsApplication-specific risk assessment A dual pedal should not be selected merely because it leaves room for future functions. An unused pedal can still be pressed, misunderstood or wired incorrectly. If the equipment only needs one command, a single pedal normally makes the...
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