WS7040 Centrifugal Brushless DC Blower
The WS7040 (by Ningbo Wonsmart) is a compact 12V/24V brushless DC centrifugal blower (70×40×37 mm) designed for high-pressure airflow in tight spaces. It features a three-phase brushless motor with NMB ball bearings for long life, giving a mean time to failure (MTTF) over 20,000 hours at room temperature. Despite its small size (~78–80 g), it can spin up to ~43,000 RPM, generating substantial airflow and pressure as outlined below:
- Voltage & Drive: 12/24 VDC input (external BLDC controller required). The blower contains built-in Hall sensors (60 pulses/rev) for precise speed feedback.
- Airflow & Pressure: Up to ~25 m³/h (free inlet) at 0 kPa, with maximum static pressure around 6.0 kPa. Performance curves show ~25 m³/h at 35,000 RPM (free flow) and ~6.0 kPa at 43,000 RPM.
- Speed & Current: Operates from ~35,000 to 43,000 RPM depending on load. Current draw ranges from ~4.5 A (at maximum flow) down to ~1.5 A (at maximum pressure).
- Noise: About 50–73 dBA (free-run noise ~73 dBA, ~70 dBA under high load). Wonsmart highlights the blower’s low-noise design (popular for CPAP and medical devices) despite the high speed.
- Dimensions & Weight: 70 mm diameter × 40 mm height (body) with a 37 mm profile depth. Weighs ~78–80 g, suitable for portable equipment.
- Construction: Plastic (PC) housing and impeller. Three-phase brushless motor (class F insulation) with high-quality NMB ball bearings. The blower is certified CE/RoHS/ETL etc..
- Lifetime: Rated for continuous operation up to +60 °C, with MTTF >20,000 h (at 20–25 °C). No maintenance is needed.
- Protections/Control: Because it uses an external driver, the system can implement speed regulation (PWM or 0–5 V), brake, and protections (over-current, over/under-voltage, stall).
Key Features (vs. 24V model): The WS7040-12-X200 is the 12V variant of Wonsmart’s WS7040 series. Compared to the WS7040-24-V200, it runs on 12V (for easy use with battery or 12V supplies) instead of 24V. Both share the same compact 70×40 mm footprint and blower design, but performance is tuned for 12V input. The 24V version achieves slightly higher pressure (6.5 kPa vs 6.0 kPa) and similar airflow (~25–25.5 m³/h). In turn, the 12V model draws more current (1.5–4.5 A vs 0.8–2.7 A) to achieve comparable output. Both models have similar noise ranges (~50–73 dBA). In practice, the 12V blower is favored where only 12V supply is available (e.g. automotive, portable electronics), while the 24V unit suits 24V industrial systems. Otherwise, feature sets (NMB bearing, brushless motor, long life, small size) are equivalent.
| Specification | WS7040-12-X200 (12V) | WS7040-24-V200 (24V) |
|
Voltage |
12 VDC | 24 VDC |
|
Max Airflow |
25 m³/h | 25.5 m³/h |
| Max Static Pressure | 6.0 kPa |
6.5 kPa |
| Speed Range | 35,000–43,000 rpm | 37,000–45,000 rpm |
| Current (load) | 4.5 A (free), 1.5 A (max pressure) |
2.7 A (free), 0.8 A (max pressure) |
Applications
The WS7040-12-X200 is ideal for hot-air soldering/rework stations and similar tools. Its high-pressure, high-speed airflow can deliver heated air to a rework nozzle for component removal and PCB soldering. Wonsmart explicitly lists SMD soldering rework stations among its targets. Beyond soldering, the blower’s compact high-pressure output suits portable or handheld instruments – e.g. battery or fuel-cell testers, environmental meters, or portable ventilators – wherever a 12V supply is used. In fact, Wonsmart notes use in CPAP medical devices and fuel-cell systems, indicating its fit for small devices needing quiet, stable airflow.
Other scenarios include compact cooling or airflow-control systems: for example, board-level ventilation in tight enclosures (small telecom or instrumentation cabinets), portable air sampling pumps, or mini HVAC/blower units. Its 12V operation makes it easy to integrate into battery-powered or low-voltage systems. In all cases, the blower’s robust brushless design, long life and ease of electronic speed control (PWM/voltage) provide reliable performance in industrial and medical settings.
Summary: The WS7040-12-X200 is a professional-grade, miniature 12V centrifugal blower. It combines high static pressure (~6 kPa) and airflow (~25 m³/h) with a low-profile design. Key advantages include low-noise operation, long life (NMB bearings, MTTF>20k hours), and flexibility to be driven by external motor controllers. These features make it well-suited for hot-air rework stations, handheld test equipment, portable airflow-control devices, and other applications where 12V high-pressure airflow is needed.
Post time: May-20-2025