ISO9001 / IATF16949/ ISO14001 etc

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UnionwellAutomotive Micro Switch Manufacturer | IP67 Certified - Unionwell

Unionwell is a leading automotive micro switch supplier in China, boasting over 30 years of R&D and manufacturing experience. Unionwell possesses its own factory and a mature manufacturing system, is IATF 16949 automotive quality system certified, and produces over 250 million automotive microswitches annually, providing IP67 protection-rated product solutions. Leveraging its strong production capabilities and engineering development experience, Unionwell provides professional OEM/ODM services to global automotive OEMs and Tier 1 suppliers.
Unionwell's automotive microswitches encompass door lock microswitches, automotive door microswitches, limit switches, and plunger switches, widely used in critical application scenarios such as automotive door systems, safety control systems, and new energy vehicle charging interfaces, providing reliable, accurate, and durable signal detection and control solutions for automotive electronic systems.

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Automotive Micro Switch Overview

Automotive microswitches are precision, instantaneous electronic components widely used in car door locks, seat adjusters, electric vehicle charging systems, and safety restraint modules. As a professional manufacturer of automotive microswitches, Unionwell produces IP67-rated switches that can operate reliably in a temperature range of -40°C to +85°C.
Automotive micro switches are characterized by their compact size, high reliability, and high precision. Their key advantages include fast response speed, long lifespan, and stable operation in high-temperature, high-humidity, and vibration environments. They are essential switches for automotive electronic control and safety systems.
Automotive door lock micro switches are commonly used for door lock control, and seat adjustment systems rely on them for precise position feedback. Instrument clusters and automotive motor systems also utilize these switches. Unionwell offers both OEM and custom automotive micro switch solutions, ensuring they meet the diverse performance, lifespan, and protection level requirements of various automakers.
The picture shows Unionwell's most classic automotive micro switch model G303 car door lock micro switch.
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Unionwell automotive micro switches product categories

Unionwell's automotive micro switches (including EV electric vehicles) are available in a variety of types to meet the needs of various types of automotive. The automotive switches shown below are all waterproof micro switches that meet the IP67 protection level. They have sufficient durability and reliability, can work stably in an environment of -40°C~+85°C, and perform well in harsh automotive environments.
At the same time, there are a variety of lever types, including common straight lever micro switches, roller lever switches, etc. With the SPDT circuit switch, it has precise and fast switching functions and is an ideal choice for automotive system control micro switches!

Our Automotive Micro Switch Product LinesClick the card below to learn more about other types of automotive micro switches.


Unionwell Micro Switch Types

Product Series Datasheet Voltage Rating Temperature Range IP Rating Durability (Electrical / Mechanical) Typical Applications
G303 Sealed Subminiature Micro Switch pdf 125/250VAC -40℃ ~ +85℃ IP67 100,000 / 500,000 cycles Automotive, Car door, Industrial control
G304G Clip Type Silent Sealed Micro Switch PDF 12VDC -40℃ ~ +85℃ IP67 300,000 / 300,000 cycles Automotive Door Locks, Air-conditioner,Communication
G5W11 Waterproof and Dustproof Basic Micro Switch PDF 125/250VAC/48VDC -40℃ ~ +85℃ IP67 50,000 cycles Air Conditioning, Industrial Equipment
G6 Miniature Micro Switch PDF 125/250VAC -25℃ ~ +125℃ none 100,000 / 1,000,000 cycles Air-conditioner, Small Appliances
G9 Sealed Mini Micro Switch PDF 125/250VAC -25℃~+120℃ IP67 100,000 / 5,000,000 cycles Automotive, Home appliances
G9A Sealed Miniature Micro Switch PDF 125/250VA -40℃ ~ +85℃ IP40/IP67 50,000/200,000 cycles Printers, Consumer Electronics
G10 Subminiature Micro Switch PDF 125VAC -40℃~+85℃ none 50,000/100,000 Mouse, Gaming Devices
G10B Charging Gun Micro Switch PDF 250VAC/30VDC -40℃~+85℃ IP65/IP67 10,000/100,000 Charging Gun,Charging Pile Equipment,Charging Port Control
G19 Waterproof Seat Sealed Adjustment Switch PDF 12/14 VDC -40℃~+85℃ IP67 30,000/50,000 Seat adjustment system,Car
G20 Automotive Seat Belt Reminder Switch PDF 48 VDC -40℃~+85℃ IP67 30,000/100,000 Seat adjustment system,Car
G23 Motor Electronic Lock for Charging PDF 12VDC -40℃~+85℃ IP67 6,000/600,000 Charging Gun Application

Case: Automotive Door Handle Micro Switch

Unionwell automotive micro switches for door lock systems are compatible with 200+ vehicle models and available with multiple terminal and lever options. Supported by reliable performance and long service life, they have been used in 300+ automotive projects, helping customers reduce field failure rates by up to 40% through optimized switch reliability.

  • IP67 switches are waterproof and dustproof, suitable for various harsh environments
  • Provide accurate and fast response, reduce the response time of the car door and improve the user experience.
  • With a variety of terminal options to meet different wiring needs, it provides flexibility for various vehicle applications.
  • Good durability, mechanical life of more than 500,000 times, no need to frequently replace sealed automotive micro switches
Contact for Custom Automotive Door Micro Switch
G304-6-9 tesla door handle micro switch

Application of G3 micro switch in sun visor

G3 series micro switches (G304A model) are widely used in car sun visors, mainly used to control the switch of the built-in makeup mirror light in the sun visor. When the driver or passenger opens the sun visor or the mirror cover, the micro switch is triggered and the mirror light is automatically lit; when the mirror cover is closed, the light goes out, realizing intelligent lighting control.

This series of switches is small in size, easy to embed into the internal structure of the sun visor, and has IP67 waterproof and IP40 dustproof performance, ensuring long-term stable operation in the complex environment inside the car. In addition, the G3 series micro switches support a variety of installation methods and terminal options to meet different car models and design requirements.

Compact 19.8 × 6.4 × 11.0 mm design, operating force from 150gf, up to 300,000 electrical/mechanical cycles, and a -40°C to +85°C operating temperature range for demanding automotive applications.
    Learn More About The G3 Micro Switches

    Micro switch application in car door lock

    G303 series micro switches are widely used in automobile door lock systems to accurately identify the closed state of the door. When the door lock mechanism completes the locking action, the micro switch is triggered synchronously and feedbacks the locking signal to the body control module (BCM), realizing functions such as door lock status monitoring, anti-theft system linkage, and headlight response.

    This model has cooperated with many brand automobile suppliers, has rich project experience, and is suitable for various models. Its IP67-level sealing performance can effectively resist rain, dust and oil interference, ensuring long-term stable operation.

    The G304A is specifically designed for vehicle door lock applications. Its compact size (19.8 × 6.4 × 11.0 mm) offers a variety of operating force options (default 150–300 gf), a lifespan of up to 300,000 cycles, and reliable performance within a temperature range of -40°C to +85°C.
      Learn More About The G3 Micro Switches

      Other automotive micro switch applications

      1.Door Locks and Windows: Unionwell automotive rocker micro switches, are commonly used in door lock and window control systems, ensuring precise and reliable operation for passenger convenience and safety.
      2.Lighting Control: These switches for cars, are integral to lighting control systems in vehicles, enabling accurate switching of headlights, turn signals, and interior lighting.
      3.Seat Adjustment: Unionwell G19 seat adjustment micro switches play a vital role in seat adjustment mechanisms, providing precise control over seat positioning for enhanced comfort and ergonomics.
      4.Safety Systems: From airbag deployment to brake light activation,  seat belt reminder switches are essential components of safety systems, ensuring prompt response and reliable performance in critical situations.
      5.Electric Car Charging Systems: In electric vehicle charging solutions, automotive-grade microswitches are integrated into the charging connector and electronic locking mechanism to detect the locked position, confirm the interlock status, and provide real-time feedback to the control unit. This ensures that power is only supplied after the connector is securely connected, thereby improving charging safety, connection reliability, and system diagnostic capabilities in harsh environments.

      Applications

      Features of Automotive Micro Switches

      Automotive micro switches provide precise control, high durability, compact design, resistance to vibrations, and reliable performance in harsh environments.

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        High Durability & Long Life Cycle

        -Our automotive microswitches offer exceptional durability, with lifespan varying by model. Common waterproof models, operating at 10A 250VAC, offer a mechanical life of 500,000 cycles and an electrical life of 100,000 cycles, ensuring long-term reliable operation in harsh automotive environments.
      • High-Temperature Resistancecqs

        Waterproof & Dustproof

        -We offer automotive microswitches with IP40 and IP67 protection ratings to meet diverse operating environment requirements. IP40 is suitable for general automotive applications, while IP67 is designed for harsh environments such as electric vehicle charging systems and external safety, ensuring reliable operation even in humid, dusty, and contaminant conditions.
      • Corrosion Resistancegs9

        Customizable Actuator & Lever

        -Our automotive microswitches offer linear, roller, slide, and push-button configurations, supporting operating forces of 0.5–10N, actuator lengths of 5–50mm, and customizable PCB, solder, or quick-connect terminals, providing flexible solutions for door locks, seat adjustments, trunk lids, and other automotive systems.
      • Compact and Versatileb4a

        Certifications

        - All our automotive microswitches are UL, cUL, CE, ENEC, RoHS, and REACH certified, and manufactured under an IATF 16949 certified quality management system, ensuring reliable product quality and compliance with global automotive market standards.
      • Contact us for free samples and verify the superior performance and quality of Unionwell automotive micro switches.

      We Collaborate to Deliver More solutions

      Why Choose Unionwell for Automotive Micro Switch

      Unionwell is a automotive micro switch manufacturer in Huizhou, Guangdong with 30 years of manufacturing experience. It covers an area of ​​more than 65,000 square meters, has obtained CE certification from many countries around the world, has introduced advanced equipment in the industry, and has a professional R&D team!
      • 1

        Quality Certification

        We have formed a complete quality management system and have passed ISO9001, IATF16949, ISO14001 certifications, with high-quality and reliable performance!
      • 2

        Efficient Production Capacity

        Unionwell has introduced advanced automated production technology in the industry, with an annual production capacity of more than 250 million switches, including more than 4 million waterproof automotive switches.
      • 3

        Customized Service

        Unionwell has many R&D engineers with 20 years of work experience, and has many years of experience in OEM and customized micro switches, which can meet your various project needs.
      • 4

        Source Factory

        As a leading Chinese manufacturer, Unionwell manufactures and ships automotive switches directly from the factory, eliminating intermediaries, offering more competitive pricing, and facilitating communication and coordination.
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      FAQ

      What is the lead time and MOQ for bulk purchase of automotive micro switches?

      The delivery cycle for standard models is 2~3 weeks; the delivery cycle for customized models depends on the complexity of the process, generally 4~6 weeks. We support small and medium-sized batch purchases, and the minimum order quantity (MOQ) is generally 2000~3000 pieces, which can be negotiated and determined according to the product model and cooperation situation.

      How to choose the right automotive micro switch for door lock?

      When selecting a micro switch for automotive door locks, key considerations include lifespan, sensitivity, and environmental adaptability. The G303 sealed micro switch is ideal for door lock applications. Its high reliability and long lifespan, combined with its stability under vibration and temperature fluctuations, make it the optimal solution for door lock systems.

      What is the temperature resistance level of the G5W11 automotive switches?

      The temperature resistance of the G5W11 automotive switches is - 40℃ to + 85℃. 

      What kind of wires can be installed in the G5W11 automotive switches?

      The G5W11 automotive switches is usually equipped with UL1015 and UL1007 wires. Other wires can also be equipped, as long as they are not too thick.

      How do we distinguish the 187 and 250 terminals of our G5 series automotive switches?

      Mainly distinguished by the width of the terminal, the width of the 187 terminal is 4.8MM, and the thickness of the 250 terminal is 6.3MM

      What certifications have your automotive micro switches passed? What automotive industry standards do they meet?

      Our automotive micro switches are certified by IATF 16949, ISO 9001, RoHS and REACH. Some of our products also comply with ISO9001 standards. They can meet the requirements of automotive-grade electrical performance, environmental reliability and mechanical life, and are suitable for OEMs and Tier 1 supply chain systems.

      Are you a manufacturer or an agent? Do you have any agents? Where are they located?

      We are a Unionwell micro switch manufacturer. Our micro switches are all independently developed, produced and sold. We currently have multiple agents, all of which are located throughout China, and no foreign agents.

      Can you provide technical drawings or datasheets?

      Of course. Due to the large number of product types, we will provide a simple selection manual, and then provide specific model automotive micro switch drawings or 3D drawings.

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