What Is A Micro Switch In A Car

auto micro switch application

What Is A Micro Switch In A Car

What is a micro switch in a car?


A subminiature micro switch in a car, also popular with people as a micro switch, is a mini electric switch that is acted by a little physical force through the pressing of the contact. 



What does the microswitch in the car door do?

The micro switch in a car door plays a vital role; inside the door handle of a car, the micro switch controls the car door to open or close. When the car door handle is opened by force, the microswitch will close the circuit inside the car door, and then the car control system will receive a signal that the car door has been opened. The system will receive a sign to let the travel safely by only closing the car door!

Usually, the car door handle needs two micro switches(G306 series micro switch) with wire; the functional features of the car door request the microswitch should be waterproof(IP67) and have electric life cycles. At the same time, a suitable circuit design is necessary for the car door handle, such as the size, voltage, electricity, operation force, etc. 

Most auto parts manufacturers consider the certification first. Like the IATF16949 quality assurances system, ENEC,UL,CUL,CQC,CB,etc. The certification standard makes sure the micro switch is quality!

In total, Unionwell G306 series micro switch has plenty of applications in the auto parts, such as car door handles. The G306 series micro switch is an IP67waterproof microswitch, has passed the IATF16949 quality certification system, and has an ENEC, UL, CUL, CQC, and CB certification. If you need the G306 microswitch, welcome to contact us.

If you need a customized micro switch solution, our engineer will help all, and we are your reliable microswitch supplier!


Unionwell microswitch plays a vital role in the car parts.

G3 series automotive switches are suitable for the Engine lock system/Door lock system/Back door lock/Glovebox/Centre lock system/Shift system/Reading lamp switch;

G2 rotary switch is suitable for the Rotary switch on hock;

G9 waterproof micro switches are suitable for the Extinguisher;

G1/G17 sealed tact switch is suitable for the Inverter;

G10 series subminiature micro switch is suitable for the Shift system/Reading lamp switch.

The actual automotive limit switch used in the car can be referenced in the following pictures:



Unionwell Micro switch China Manufacturer : Years Of Professtional R&D Team 

Our unionwell manufactures and develops microswitch solutions and conducts product evaluations for our customers in an actual startup state. In this way, our customers will trust us that the switch will work in the car they design before it is shipped. We also provide application design services to support our customers during the design phase.

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

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

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

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

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

In the near future, 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 up, covering product developing, precision molding, injection molding, precision stamping, automated equipment R&D, assembling and testing. 

Professional sales team is on hand to provide assistance and quick response to 3D drawing request, price quotes, and access to a significant sample program that allows engineers to test and qualify switches for their end product applications.


Related Auto Articles:





Related Product Link:


Unionwell G3 Series Subminiature Sealed Micro Switch

IP67 Micro Switch for Automotive Applications


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