Inspection Sampling Standard

WL0521 Car Headlamp Solenoid Valve The AS 0521 is a solenoid valve designed for headlamp leveling systems, which automatically control the vertical beam angle depending on the load condition. In today’s vehicles, uneven loading of passengers or cargo results in uneven weight distribution, which may cause the body to tilt, affecting the headlamp beam projection. In this case, the automotive solenoid valve ensures the correct projection of the headlamp beam by controlling the leveling mechanism. The valve is commonly used in the following: Automatic Headlamp Leveling Systems (AHLS) Xenon/HID Headlamp...

What Is WL05212 Headlamp Solenoid valve? Close-up of solenoid inside projector headlamp. WL0521 solenoid vafve is an electromagnetic actuator used in automotive projector headlights switching. Its main purpose is to control the beam switching between low beam and high beam by moving an internal shutter mirror strtucture * Used in 2.5 or 3.0 inch, projector headlamp modules • Designed for continuous automotive use It directly affects lighting safety and beam precision.

How WL05212 Headlamp Solenoid valve Works? Working Process: 1. Power ON —> Solenoid Coil energized 2. Magnetic field generated 3. Plunger pulled inward 4. Shutter Mirror changes beam position 5. Power OFF —* Spring resets plunger Benefits: - Stable magnetic force • Smooth beam transition This ensures instant high/low beam response during driving.

Learn WL05212 Structure & Main Components Main Components: • Copper coil ( Higth tempterature resistant) • Iron core (high permeability) • Moving plunger • Return spring • Housing frame • Electrical terminals Material Advantages: • Anti-corrosion treatment • High temperature resistance • Long mechanical lifespan

Performance Highlights: • Strong magnetic holding force • Stable stroke control • Vibration resistant • Suitable for LED/HID systems Technical Options: • Custom stroke length • Adjustable force • UL certifrcationed lead wire • Customized mounting bracket This allows seamless integration into various automotive lighting platforms

Quality Control Process: • 100% Incoming material inspection * Solenoid Coil resistance testing • Force measurement test * Lifecycle durability test • High/low temperature testing * 100% electrical inspection Certifications: • RoHS compliant materials Strict QC ensures consistent performance for mass production vehicles.

Before finalizing the order. Please verify: 2. Required stroke length 3. Required magnetic force 5. Operating temperature range 6. Expected lifecycle (cycles) Choosing the right headlamp solenoid valve ensures long-term performance, cost efficiency, and safety compliance.