The part number **W2TG0-31A-R2/UL** refers to a high-performance industrial cooling fan manufactured by **Sanyo Denki** (San Ace line). These fans are commonly used in telecommunications, server racks, and industrial control cabinets. ### 1. Technical Specifications The following table highlights the primary electrical and mechanical characteristics of this component: | Feature | Specification | | :--- | :--- | | **Type** | AC Fan (San Ace 120AD) | | **Rated Voltage** | 100V to 240V AC (Universal Voltage) | | **Current Type** | AC Input, DC Internal (ACDC Fan) | | **Dimensions** | 120mm x 120mm x 38mm | | **Speed** | ~3,250 RPM | | **Max Airflow** | ~106 CFM (3.0 m³/min) | | **Noise Level** | ~42 dB(A) | | **Frame Material** | Aluminum (Die-cast) | | **Impeller Material** | Plastics (Flame Retardant UL 94V-0) | --- ### 2. Key Electronic Features #### Internal ACDC Conversion Unlike traditional AC fans that use induction motors, the **W2TG0** series utilizes a **brushless DC motor** with an integrated AC-to-DC converter. * **Efficiency:** It consumes significantly less power than standard AC fans. * **Voltage Stability:** The fan maintains a constant rotation speed even if the input voltage fluctuates between 100V and 240V. #### Safety and Compliance (The /UL Suffix) The suffix `/UL` indicates that the component meets specific safety standards: * **UL/cUL Recognized:** Certified for use in the US and Canada. * **TUV/CE:** Often carries European safety marks for low voltage and electromagnetic compatibility. * **Protection:** Includes integrated "Locked Rotor Burnout Protection" and "Reverse Polarity Protection." #### Bearing System This model uses **Dual Ball Bearings**. * **Longevity:** Rated for approximately 60,000 to 100,000 hours of continuous operation (L10 life). * **Orientation:** Can be mounted horizontally, vertically, or at any angle without affecting performance. --- ### 3. Wiring Configuration The standard wiring for this series usually follows a simple lead wire setup: ```markdown - Black Wire: Line (L) - AC Input - White Wire: Neutral (N) - AC Input - (Optional) Green/Yellow: Ground/Earth ``` *Note: Some sub-variants may include a third "Sensor" wire for pulse output (Tachometer) to monitor fan speed via a controller.* ---