Headlight Projector Solenoid Valve
The car headlamp solenoid valve is built to operate the beam shutter in projector headlamps, facilitating smooth transitions between high and low beam modes. When activated, the solenoid produces a magnetic field to move the plunger to operate the light cutoff plate. The spring then returns to its original position once power is turned off. This process provides precise beam alignment and road illumination. The solenoid is built to withstand temperature variations, vibrations, and switching cycles, ensuring reliable operation in a car environment. Its compact design makes it suitable for modern car lighting systems that require precise and reliable solenoid valve actuation.
WL0521 Car Headlamp Solenoid Valve
WL0521 Automotive Lighting Actuator
Car Headlamp Solenoid Valve Manufacturer
| Brand |
Weilong |
Model Number |
WL0521 |
| Rated Voltage (V) |
DC 12 V |
Rated Power (W) |
5-10 W |
| Work Mode |
Frame Type |
RoHS |
Compliance |
| Stroke (mm) |
Customized |
Reset Time(s) |
1S |
| Service Life |
200 Thousand Times |
Certification |
CE, ROHS, ISO9001, |
| Material |
Carbon Steel Housing |
Lead Wire Length (mm) |
200 |
| Install Style |
mounted screw hole for easy setup |
Tolerance of Dimension |
+/- 0.1 MM |
| Suction Force |
1000 GF |
Insulation Class |
H 180 Degree |
| Hi-Pot Test |
AC 600V 50/60Hz 1s |
Non-excitation Holding Force |
0 |
| Working Temperature |
-10°C-100°C |
Duty Cycle |
1-100% |
| Thread Depth (mm) |
/ |
Payment Term |
TT, or LC at sight |
| Sample Order |
Yes |
Warranty |
1 Year |
| MOQ |
1000 pcs |
Supply Ability |
5000 pcs per Week |
| Delivery Time |
30 Days |
Port of Loading |
shenzhen |
Car Headlamp Solenoid Valve Application
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 Assembly
LED Adaptive Headlamp Modules
Commercial Vehicle Lighting Systems
Premium Passenger Car Lighting Platforms
Car Headlamp Solenoid Valve Adv. and Disadv.
✅ Pros (Advantages)
1️⃣ Accurate Beam Adjustment
Provides precise electromagnetic actuation for stable and controlled leveling.
2️⃣ Fast Response Time
Quick adjustment when vehicle load changes, improving driving safety.
3️⃣ Compact Automotive Design
Easy integration into headlamp housing assemblies.
4️⃣ High Temperature Resistance
Designed to withstand heat generated inside sealed headlamp systems.
5️⃣ Low Power Consumption
Efficient coil design reduces electrical system load.
6️⃣ Long Service Life
Durable plunger and spring structure ensures high cycle durability.
7️⃣ Improved Road Safety
Maintains proper beam alignment, reducing glare for oncoming traffic.
❌ Cons (Disadvantages)
1️⃣ Limited Adjustment Stroke
Compared to motorized leveling systems, movement range may be smaller.
2️⃣ Heat Accumulation Risk
Continuous energizing may cause coil temperature rise if not properly managed.
3️⃣ Mechanical Wear Over Time
Spring and plunger components may experience fatigue after extensive use.
4️⃣ Voltage Sensitivity
Performance may vary if vehicle voltage is unstable.
5️⃣ Not Suitable for Complex Adaptive Systems
Advanced matrix or fully adaptive lighting systems may require motor-driven solutions instead.
WL0521 Car Headlamp Solenoid Valve's FAQ
