The WS4540-12-NZ03 is a high-speed **12V DC brushless micro centrifugal blower** with a built-in driver, designed for compact industrial control and medical applications. This mini blower (45×40 mm) delivers powerful airflow while maintaining low noise. At maximum flow it spins around **45,000 RPM** drawing \~1.6 A (≈19.2 W) and provides up to **7.2 m³/h** (≈120 L/min) of air at 0 kPa. In high-pressure mode it reaches about **49,000 RPM** at 0.9 A (≈10.8 W), generating around **5.0 kPa** of static pressure. Noise is moderate: roughly **62 dBA** at full flow (and about 48–49 dBA at blocked output). Despite its small size (only 85 g), it achieves strong, steady airflow thanks to its efficient 3-phase brushless motor.
Specifications
- Voltage:12 V DC brushless (3-phase).
- Maximum Speed: ~45,000–49,000 RPM (at 0 kPa to full pressure).
- Airflow: Up to ~7.2 m³/h (≈120 L/min) at 0 kPa.
- Static Pressure: Up to ~5.0 kPa (≈5000 Pa) at low flow.
- Current Draw: ~1.6 A at max flow; ~0.9 A at max pressure.
- Power: ≈19.2 W (max flow) down to ≈10.8 W (max pressure).
- Noise Level:~62 dBA at full flow; ~48–49 dBA at blocked output.
- Dimensions: Diameter 45 mm × Height 40 mm.
- Weight:~85 g.
- Certifications: CE, RoHS, REACH, ETL (suitable for industrial use).
Design and Control
The WS4540-12-NZ03 incorporates an **internal driver/controller** on its PCB, which greatly simplifies installation in embedded systems. It supports flexible speed control via **PWM or 0–3.3 V analog signals** , allowing precise airflow adjustment without external electronics. The blower’s plastic housing (PC) and impeller are ultrasonically welded for durability, while its 3-phase brushless motor ensures efficient high-speed operation. Note that the shaft uses an open bearing design: this keeps cost and complexity low, though in very tight-sealing applications a small amount of air can leak through the bearing. Overall, the compact construction – including built-in controls – makes the WS4540-12-NZ03 easy to integrate into control panels or devices with limited space.
Applications
Owing to its compact size and high-pressure output, the WS4540-12-NZ03 is widely used in industrial automation and specialized equipment. It is ideal for **hot-air soldering and rework stations**, where it provides steady, hot airflow for PCB work. It is also used in **air cushion (inflatable) systems**, CPAP respiratory machines, fuel cell air supplies, and other medical or portable air devices. In general, any industrial control or equipment requiring a small yet powerful blower – from cooling electronics to pneumatic actuators – can benefit from this model. Its integrated driver and PWM control make it straightforward to incorporate into automation systems, ensuring reliable, high-pressure airflow in a compact package.
