The **W2TG0-31A-R** is a specific high-performance cooling fan component, typically manufactured by **Sanyo Denki** under the **San Ace** brand. It is an AC-powered axial fan designed for industrial applications requiring high reliability and heat dissipation. ### Technical Specifications The following table highlights the core electronic and physical characteristics of the unit: | Parameter | Specification | | :--- | :--- | | **Input Voltage** | 100V - 115V AC (Single Phase) | | **Frequency** | 50 / 60 Hz | | **Rated Current** | ~0.19 / 0.16 A | | **Rated Input** | ~16 / 14 W | | **Rated Speed** | 2700 / 3100 RPM | | **Max Airflow** | ~56.5 / 67.1 CFM | | **Static Pressure** | 44.1 / 61.8 Pa | | **Noise Level** | ~40 / 44 dB(A) | | **Bearing Type** | Dual Ball Bearing | --- ### Internal Electronic Components The "Electronic parts" of an AC axial fan like the W2TG0-31A-R are relatively straightforward compared to DC fans with complex PCB controllers, but they include critical safety and functional elements: 1. **Induction Motor (Shaded Pole or Capacitor-Run):** The heart of the unit is an AC motor. It uses copper windings (stator) to create a rotating magnetic field that drives the permanent magnet or induction rotor. 2. **Impedance Protection:** The "-R" suffix often indicates "RoHS" compliance, but the motor itself is typically **Impedance Protected**. This means the electronic resistance of the windings is high enough that if the fan blade is locked (stalled), the motor will not overheat or catch fire. 3. **Ball Bearing System:** It utilizes two high-precision ball bearings. Electronically, these reduce friction-induced heat, which preserves the integrity of the winding insulation over a long service life (typically 25,000 to 40,000 hours). 4. **Frame and Grounding:** The frame is usually die-cast aluminum. It includes a grounding terminal or lead wire to prevent electrostatic discharge (ESD) and ensure user safety from electrical leakage. ### Typical Wiring Configuration The unit usually features two lead wires for power input: ```text L (Line) --------[ Black Wire ] N (Neutral) -----[ Black Wire ] GND (Ground) ----[ Green/Yellow or Frame Screw ] ``` --- ### Key Applications * **Control Panels:** Removing heat from industrial PLCs and power supplies. * **Server Racks:** Maintaining airflow in telecommunications enclosures. * **Medical Equipment:** Cooling high-precision laboratory instruments.