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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Customer recognition is our greatest motivation.
NEWS
Stay updated with the latest developments, product launches, and industry insights.
Micro Switch Parallel Contacts: Why Current Ratings Do Not Add
Micro switch parallel contacts should not be used to add current ratings unless the manufacturer explicitly supports the arrangement and its conditions. Two contacts do not necessarily close together, share current equally or open together. The first contact to close and the last to open may face a different duty from the steady parallel combination. For an OEM build, define the purpose of paralleling, examine each credible contact state and select a supported switching arrangement instead of treating two catalog ampere values as arithmetic capacity. Clarify the reason for a parallel path A proposal to connect contacts in parallel can start with several different problems: insufficient current capacity, a desire to keep a circuit available, or an attempt to reduce resistance. These are separate objectives. Write down the actual requirement before changing the harness. A circuit that remains energized after one contact sticks may satisfy an availability objective while violating the intended stop behavior. Draw every contact, common terminal and wire connection. Identify whether there are two separate switches, two independent poles in one device, or the NO and NC terminals of an SPDT mechanism. Those arrangements cannot be treated as equivalent. In particular, the two throws of an SPDT switch are alternate destinations; joining them does not create two independently specified simultaneous closed poles. Use the micro switch wiring guide to establish the normal terminal logic before discussing a changed topology. Confirm the actual variant and diagram from the supplier. The KW7 family provides a physical product reference, but its appearance does not establish pole independence, synchronized operation or permission to parallel contacts for a higher load. Close view of two separate KW7 specimens with unconnected terminals. Product-reference illustration;...
↗Micro Switch Capacitive Loads: Review Inrush Before Selecting Contacts
A micro switch capacitive load needs a closing-current review, even when its steady running current is small. Charging the load's input capacitance can create a short current pulse that a normal running-current measurement misses. Select contacts against the exact voltage, circuit, switching duty and supported load evidence; do not assume a resistive-load marking also approves an electronic power input. This guide explains how an OEM can describe that pulse, examine practical mitigation options and prepare a useful supplier review without inventing a universal capacitive-load rating. Identify what the switch actually energizes Begin with the equipment schematic and the real load, rather than the name on the finished appliance. A switch that enables a logic input sees a different circuit from a switch that connects power to an electronic controller. Both assemblies may draw the same running current elsewhere in the machine. Trace the current through the contact during closing, normal operation and opening, including alternative supply paths and any input filtering. List the supply voltage range, whether the switched path is AC or DC, the input capacitance where known, and the load manufacturer's startup information. Include power-supply current limiting and cable resistance. If the load is a purchased module, ask its manufacturer for the relevant input behavior rather than estimating everything from the nameplate wattage. A switching power supply can present a more complicated input than a single ideal capacitor. The KW7 series product page is a starting point for identifying the physical switch family. Ask Lemaele to confirm the complete variant, terminal arrangement and supported electrical duty for your circuit. A family photograph or a headline current value does not establish a capacitive switching capability. Retain the exact drawing...
↗Micro Switch Tolerance Stack-Up: Check the Assembly Travel Window
A micro switch tolerance stack-up checks whether the assembled mechanism will operate the switch and let it return across the dimensional variation allowed by the design. Start from a common reference and track the dimensions between the switch mounting location and the moving target. Compare the resulting actuator position with the exact variant's supported operating, travel and return requirements. Nominal alignment is only one case. An assembly can work at the center of its dimensions while another permitted combination fails to operate or imposes excessive travel. Define the two states the mechanism must achieve Write down the required mechanical and electrical conditions in both the target-present and target-withdrawn states. The required event may be a change in one contact path, but the assembly also needs a supported mechanical position and an unobstructed return path. Identify which machine position establishes each state and what controls that position. A loosely described requirement such as 'press the switch fully' leaves both the actuation boundary and maximum imposed movement undefined. Use the KW7 product family only as the starting point for obtaining the exact component documents. Confirm the complete actuator variant, mounting features, contact arrangement and drawing revision. The travel definitions article explains why pretravel, overtravel and differential travel address different boundaries. Do not replace their actual specified values with dimensions estimated from a photograph. If a required boundary is unavailable, identify that missing evidence before approving the assembly window. KW7 switch beside two separate target-height specimens and disconnected caliper. Product-reference illustration; separate objects are not an approved installation or measured test result. Draw one dimensional chain from a common reference Choose a reference that connects the switch mount and the target position in...
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