When we think about automotive safety, we often picture airbags, seat belts, or advanced driver-assistance systems. But sometimes, it's the smallest components that quietly do the most important jobs.
One such component is the micro switch inside your car seat's locking system—and Unionwell's G303R series is a standout in this category.
In many modern vehicles, the seat needs to be properly locked before allowing certain functions, such as seat adjustment or airbag deployment. That's where the G303R comes in.
When the seat lock is engaged, the locking mechanism physically presses against the micro switch. This triggers a small internal movement that closes the circuit and tells the car's Electronic Control Unit (ECU) that the seat is securely locked.
If the seat is not locked or the mechanism becomes loose, the pressure on the switch is released. The switch then opens the circuit, sending an “unlocked” signal to the ECU. As a result, the system can prevent seat movement or alert the driver, helping reduce the risk of accidents.
Unionwell's G303R is more than just a basic micro switch—it's designed for reliability in harsh automotive environments. Here's what sets it apart:
Built-in resistor: Helps manage signal integrity and prevents false alarms
IP67 protection: Resistant to dust and water—essential for long-term use inside vehicles
Wide temperature range: Operates smoothly from -40°C to +85°C, perfect for all seasons and climates
Durability: Rated for 100,000+ electrical cycles, depending on the model
Compact and versatile: Easy to integrate into limited spaces within seat structures
While it's commonly used to detect seat lock status, the G303R is also trusted in other areas—especially in EV (electric vehicle) charging guns and charging ports. In both applications, accurate signal transmission and resistance to environmental stress are essential, and the G303R delivers on both fronts.
At Unionwell, we specialize in micro switch technology, and we understand that safety starts with reliable components. The G303R proves that even something small—just a few centimeters in size—can play a big role in keeping drivers and passengers safe.
If you're developing automotive systems or EV hardware and looking for durable, precise, and cost-effective detection components, the G303R is worth considering.
Learn more about our G303R series and other automotive-grade micro switches at: www.unionwellgz.com
Contact us: inquiry@unionwellgz.com
English 
français 
Deutsch 
Español 
italiano 
português 
tiếng việt 
Türkçe 
slovenský 
slovenčina 
беларускі 
