The **W2TS-4A3-R2** is a specific part number typically associated with high-performance **Brushless DC (BLDC) Cooling Fans**, often manufactured by companies like Sanyo Denki or integrated into specific industrial/server power supply units. Below is a breakdown of its electronic components and technical characteristics. --- ### 1. Technical Specifications The "W2TS" series generally refers to high-static pressure fans designed for heavy-duty cooling. | Parameter | Typical Value | Description | | :--- | :--- | :--- | | **Input Voltage** | 12V DC | Standard operating voltage. | | **Current Rating** | ~1.5A to 3.0A | High-power consumption for high RPM. | | **Bearing Type** | Dual Ball Bearing | Ensures longevity and high-temperature stability. | | **Connector** | 4-Pin / 3-Pin | Depends on the specific revision (R2). | | **Material** | Plastic (PBT) | UL94V-0 rated flame retardant housing. | --- ### 2. Internal Electronic Parts The internal PCB of this fan contains several critical components that manage its operation: * **Stator Windings:** Three-phase copper coils that create the magnetic field to spin the rotor. * **Hall Effect Sensor:** A small IC that detects the position of the rotor’s permanent magnets to ensure correct timing for the phase switching. * **PWM Controller IC:** Manages the speed of the fan by pulsing the power (Pulse Width Modulation). * **Power MOSFETs:** Act as high-speed switches to energize the stator windings. * **Protection Circuitry:** * *Locked Rotor Protection:* Automatically cuts power if the fan is obstructed to prevent the motor from burning out. * *Reverse Polarity Protection:* Prevents damage if the DC wires are connected backwards. --- ### 3. Pinout Configuration (4-Wire Interface) If the device uses a 4-pin interface (standard for the 4A3 suffix), the pinout is usually as follows: | Pin | Color | Function | Description | | :--- | :--- | :--- | :--- | | 1 | Black | GND | Ground / Negative terminal | | 2 | Red | VCC | +12V DC Power | | 3 | Yellow | Tachometer | Output signal (Senses RPM) | | 4 | Blue | PWM | Control signal (Adjusts speed) | --- ### 4. Application Areas Due to its robust build, the W2TS-4A3-R2 is primarily used in: 1. **Server Racks:** High-density cooling for CPUs and GPUs. 2. **Industrial Power Supplies:** Cooling high-wattage AC/DC converters. 3. **Telecommunications:** Cooling base stations and outdoor enclosures. ---