The **W2TG0-3B2-R** is a specific part number typically associated with high-performance cooling solutions, most commonly found in server equipment (such as Lenovo/IBM systems). Specifically, it refers to a **Hot-Swap Dual Fan Module**. Below is a breakdown of the electronic components and specifications associated with this part. ### 1. General Specifications | Feature | Details | | :--- | :--- | | **Component Type** | Hot-Swap System Cooling Fan | | **Configuration** | Dual-fan assembly (Two fans in one housing) | | **Voltage** | 12V DC (Nominal) | | **Connection** | Proprietary multi-pin gold finger or blind-mate connector | | **Main Use Case** | Enterprise Servers (e.g., IBM System x3650 M4 / M5) | --- ### 2. Key Electronic Components #### A. DC Brushless Motors The core of the unit consists of two high-RPM brushless DC (BLDC) motors. - **Commutation:** Managed by internal integrated circuits (ICs) that handle the switching of the electromagnetic coils. - **Bearings:** Usually utilizes dual-ball bearings for longevity in 24/7 data center environments. #### B. PWM Control Circuitry The module features **Pulse Width Modulation (PWM)** control. - This allows the server's motherboard or BMC (Baseboard Management Controller) to precisely adjust the fan speed based on thermal sensors. - **Efficiency:** PWM reduces power consumption and noise when the server is under low load. #### C. Tachometer Output (Sensor) Each fan within the module provides a **Frequency Generator (FG)** signal. - This electronic pulse tells the system the exact RPM of the blades. - If the RPM falls below a certain threshold, the server triggers a "Fan Fail" alert. #### D. Hot-Swap Interface The "R" in the suffix often denotes Redundancy or RoHS compliance, but the assembly itself features a specialized PCB interface: - **Blind-mate Connector:** Allows the part to be plugged in or pulled out while the server is powered on. - **Protection Diodes:** Often includes circuitry to prevent back-EMF or sparks during a hot-plug event. --- ### 3. Visual and Mechanical Integration * **Housing:** High-temperature resistant plastic. * **LED Indicators:** Some versions of these modules include a small diagnostic LED (often amber) that lights up if the internal electronic controller detects a motor failure. * **Airflow:** Designed for high static pressure to push air through dense drive bays and CPU heatsinks. --- ### 4. Comparison Table: Standard Fan vs. W2TG0-3B2-R | Feature | Standard PC Fan | W2TG0-3B2-R Module | | :--- | :--- | :--- | | **Redundancy** | Single point of failure | Dual-fan design for failover | | **Swapping** | Requires shutdown/screws | Tool-less Hot-Swap | | **Connector** | 3-pin or 4-pin Header | High-density contact pads | | **RPM Range** | 1,000 - 3,000 RPM | Up to 15,000+ RPM |