How To Wire A Waterproof Micro Switch

How To Wire A Waterproof Micro Switch

How To Wire A Waterproof Micro Switch


Knowing how to wire a micro switch is essential for micro switch applications. The micro switch is tiny, but it has a significant effect on our daily life, such as computer mice, automotive electronics, communications equipment, military products, testing equipment, gas water heaters, gas water heaters, gas stoves, small appliances, microwave ovens, rice cookers, and medical equipment, building automation, electrical tools and general electrical and radio equipment, 24-hour timers, etc. The waterproof micro switch is one of the switches. Because of its waterproof characteristics, it is often used in places with harsh environments.


Start to learn the micro switch wire.

Micro switch wire is a kind of micro switch with wiring. Compared to other lever /roller lever/long lever/pin plunger micro switches, the wiring micro switch is handy in most mechatronics projects or when you need a primary sensor. 

When you press the micro switch by a mini force, the switch will act snap-action, and you can get the “clicky” sound. Sometimes, people prefer to name the switch a momentary microswitch.


Why should we know how to wire a micro switch correctly?

Do you want to use the micro switch properly in your dishwasher? You should first learn the micro switch wiring because the unionwell waterproof micro limit switch is widely used in the dishwasher door lock system! To properly install the micro switch inside the dishwasher with wire, it’s necessary to learn the following contents about micro switch wiring. ( For all dishwasher manufacturers):


Firstly, you should understand the micro switch contact terminals.

A diagram of the micro switch makes your understanding easy. Especially micro switches appear in your life first. When you design a dishwasher in 3D Drawing, you will find the existence of the micro switch. So small it. Please don’t be worried about it. The components of micro switch refer to the following micro switch diagram: 


COM terminals— The power must connect the com terminals; all micro switch applications should do it. 

NO terminals— The terminals mean Normally Open. You should connect the wire to the NO terminals to stop running the motor. Ordinarily open means the microswitch stays in no working state. The circuit of the microswitch doesn’t have a current.

NC terminals–The terminals are Normally Closed. When you plan to start the system, you should connect the wire to the NC terminal.


Secondly, you need the following tools to do a practice drill.

  1. Unionwell micro switch
  2. Battery
  3. An electrical device ( lamp )
  4. Wire (5amp red and black)
  5. Soldering iron
  6. Scissors to cut wires
  7. Clamps to hold wires while they are being soldered


After preparing everything above, you can do the test microswitch smoothly!

Now, connect the micro switch with a wire to the battery; the batteries positive connect the Normally Open and Normally Closed micro switch with two wires, and the other wire connects the COM terminals and the lamp. 

Finally, another wire should run from the battery’s harmful to the lamp. This wiring method automatically allows such a lamp to be switched on using the micro switch. 

If you install the micro switch inside the dishwasher, an NC terminals microswitch is vital for the door lock system! When you close the dishwasher door, the action accurate the micro switch inside the door, and the dishwasher starts to run the washing work. It is used as a mini safety device!


How does a micro switch work?

The device’s motor is usually connected to the com terminal of the microswitch. This connecting leads into the switch and energizes the spring/lever/roller lever/long lever. Because these contact components touch the customarily closed pin, it sends power out. NC Terminals is called a resting state. When you pressure the micro switch’s spring/lever/roller/long lever, the components are moved, and the power is transferred to the normally open pin.

We can use the SPDT micro switch in NC or NO mode, separately or simultaneously, depending on the application.


Microswitch Terminals

Generally, the micro switch has three terminals. One is a common terminal, an open terminal, and the other is a closed terminal. The common point is like the neutral line in the socket. Usually, the open terminal opens the switch, the terminal when the current flows and the closed point disconnects the current through the contact. Put the wiring to the corresponding position, and it will work well.  


Unionwell: Micro switch china factory/company/manufacturer/supplier

Huizhou Unionwell Sensing & Control Electronics Co., Ltd specializes in quality micro switches for the automotive industry and white goods of home appliances. Main products include basic micro switches, waterproof switches, air pressure switches, mechanical keyboard switches, and door switches.

For better guarantee on pricing, lead time and quality control, we acquired Huizhou Greetech Electronics Co., Ltd in 2021. We made it our China production base with over 1000 employees and a 260 million pieces/year production capacity.

Huizhou Greetech is an ISO9001, IATF16949 and ISO14001 certified micro switch manufacturer whose complete series of products have been granted global access permit certifications, which include ENEC, UL, CE, CB, etc.

Our global reach covers North America, Europe, Asia and South America.

Most of our business partners/end customers are Global 500 enterprises, including world-famous home appliance brands and leading automotive suppliers in North America and Europe.

Shortly, we are launching a new industrial base at Longmen, Huizhou, Guangdong Province; automation equipment will be introduced, which would massively improve the switch production capacity from 260 million pieces to over 1.3 billion pieces/year. 

A one-stop system will be built, covering product development, precision moulding, injection molding, precision stamping, automated equipment R&D, assembling and testing. 

The professional sales team is on hand to provide assistance and quick response to 3D drawing requests, price quotes, and access to an adequate sample program that allows engineers to test and qualify switches for their end product applications.


Core Value:

Goal, Responsibility, Coordination, Innovation

Effort, Development, Openness, Integrity


Our Mission:

We are obligated to maintain long-term relationships that stand the test of time.


Our Vision:

To become a first-class global manufacturer of precision components and modules.


For more information, please visit our Unionwell Microswitch Website.

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