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+
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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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NEWS
Stay updated with the latest developments, product launches, and industry insights.
ON-ON-ON Toggle Switch: Circuit Logic and Wiring
An ON-ON-ON toggle switch is a three-position selector with an active contact combination in all three lever positions. In the common DPDT six-terminal version, the two poles do not necessarily transfer in the same way at the center position: one pole may connect toward one end while the other connects toward the opposite end. That staggered center logic is what makes series/split/parallel and other three-mode circuits possible. Never wire it from an ON-OFF-ON diagram; identify every continuity pair on the exact switch first. This guide explains ON-ON-ON toggle switch logic, terminal mapping, bench testing and OEM selection. LEMA product photos illustrate the physical DPDT toggle form and six-terminal layout. The referenced LT3230C listing is ON-OFF-ON, so its exterior photograph must not be treated as proof of ON-ON-ON internal contacts. ON-ON-ON is a contact sequence, not an appearance Three-position toggles can share the same lever, bushing and terminal footprint while having different internal sequences. ON-OFF-ON opens both poles in the center. ON-ON uses two maintained positions. Momentary functions are shown with parentheses, such as (ON)-OFF-(ON). ON-ON-ON maintains a defined connection in every position. The ordering code and contact table, not the number of detents or terminals, distinguish them. MarkingLever positionsCenter behaviorDo not assumeON-ONTwo maintainedNo center detentNot a three-mode selectorON-OFF-ONThree maintained or mixedBoth poles normally openCenter is not an active routeON-ON-ONThree maintainedStaggered or defined active contactsCenter pattern is not universal(ON)-OFF-(ON)Momentary endsOpen centerLever does not stay at the ends Some suppliers publish more than one ON-ON-ON center-contact pattern. A guitar-wiring source may call them Type I and Type II; industrial datasheets may use a contact truth table. Both descriptions mean the assembler must verify the exact variant. A familiar six-lug drawing from another...
↗IEC C20 Inlet vs C14 Inlet for Equipment Power
IEC C14 and C20 are grounded appliance inlets from the IEC 60320 family, but they are different interfaces and are not interchangeable. C14 mates with a C13 cord connector; C20 mates with a C19 connector. C20 is the larger choice used when the equipment input current exceeds what an approved C14 implementation can provide. The final rating is never selected by shape alone: check the exact inlet, cord set, fuse, wiring, terminal, ambient temperature, approvals and destination-market rules as one power-entry system. This C20 vs C14 inlet comparison is for OEM equipment design. LEMA’s current product-image library provides a C14-style IPZ inlet reference, so the photographs below deliberately do not claim to show a LEMA C20 product. Connector identities and mating pairs The equipment-side male appliance inlet is designated C14 or C20; the cord-side female connector is C13 or C19 respectively. The different outlines help prevent an unintended mating combination. IEC 60320-1 sets general appliance-coupler requirements, while IEC 60320-3 contains the standard sheets and gauges that define dimensional compatibility. The current IEC 60320-1 publication applies to appliance couplers integrated into equipment, and IEC 60320-3 covers the standard dimensions. Decision pointC14 inletC20 inletOEM actionMating cord connectorC13C19Specify both inlet and approved cord setPhysical interfaceSmaller standard-sheet geometryLarger, differently keyed geometryUse the exact manufacturer cutout drawingCurrent classCommon lower-current equipment inputHigher-current IEC 60320 optionUse the marked/approved rating for market and temperatureTypical system impactSmaller cutout and cord ecosystemLarger inlet, cord and conductor requirementsReview fuse, terminals, wire gauge and thermal rise togetherDirect substitutionNo; connector, cutout and cord set differRequalify the complete power-entry design A common shorthand describes C14 as a 10 A international interface and C20 as a 16 A international interface, with different approved values possible...
↗5-Pin Push Button Switch Wiring With LED
A typical 5-pin illuminated push button contains two electrically separate parts: a three-terminal changeover switch marked COM, NO and NC, plus two lamp terminals. Wire and test those parts independently. With power isolated, identify COM–NO and COM–NC by continuity; then confirm the lamp’s rated voltage and, for an LED, its polarity. Do not copy a color code or terminal position from another brand. The exact LEMA drawing and markings for the selected PBS variant must control the final connection. This guide explains the logic behind a 5-pin push button switch wiring diagram without presenting one terminal layout as universal. It covers momentary control, constant and switched illumination, PLC inputs, commissioning and the information an OEM should place on its drawing. Separate the contact circuit from the light circuit The contact section is normally an SPDT changeover contact. COM is the moving common. At rest, COM is connected to NC and isolated from NO. When the mechanism is fully actuated, COM connects to NO and leaves NC. The two remaining terminals supply the lamp. Their voltage is not automatically the same as the load circuit, and an LED normally requires the specified polarity. Some illuminated devices include current limiting for a declared supply; others require an external circuit. Treat the product datasheet as the authority. Terminal functionState at restState while actuatedVerificationCOMCommon path to NCCommon path to NOContinuity meter with power isolatedNOOpen to COMClosed to COMRecord resistance in both positionsNCClosed to COMOpen to COMRecord resistance in both positionsLamp + / anodeDepends on the desired illumination behaviorDatasheet marking and controlled low-voltage testLamp − / cathodeReturns to the approved lamp supplyDatasheet marking; do not infer from wire color The table describes a common arrangement,...
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