The **WSX120-2000-R** is a high-performance, wall-plug-in AC-DC power supply manufactured by CUI Inc. It is part of the WSX series, designed for global compatibility and efficiency. --- ### 1. General Specifications The model name follows a specific nomenclature that defines its core electrical characteristics: | Parameter | Specification | | :--- | :--- | | **Input Voltage** | 90 ~ 264 Vac (Universal) | | **Output Voltage** | 12 Vdc | | **Output Current** | 2000 mA (2.0 Amps) | | **Power Rating** | 24 Watts | | **Efficiency Level** | Level VI (High Efficiency) | | **DC Connector** | 2.1 x 5.5 x 9.5 mm (Center Positive) | --- ### 2. Electronic Component Characteristics The internal circuitry of the WSX120-2000-R consists of several critical stages typical of a **Switched-Mode Power Supply (SMPS)**: #### A. Input Stage * **Protection:** Includes an internal fuse and Thermistor (NTC) to handle inrush current and protect against over-current conditions. * **EMI Filtering:** Features X and Y capacitors and a common-mode choke to suppress electromagnetic interference, ensuring compliance with FCC and CE standards. * **Rectification:** A bridge rectifier converts the AC input into high-voltage DC. #### B. Conversion & Control Stage * **PWM Controller:** An integrated circuit (IC) manages the Pulse Width Modulation to maintain a steady 12V output despite fluctuations in input voltage or load. * **Power MOSFET:** A high-speed switching transistor that drives the high-frequency transformer. * **Isolation Transformer:** Provides galvanic isolation between the AC mains and the DC output for user safety. #### C. Output Stage * **Schottky Rectifier:** High-speed diodes convert the high-frequency AC from the transformer back into DC with minimal voltage drop. * **Filtering Capacitors:** High-quality electrolytic capacitors smooth out the "ripple" voltage to provide clean 12V power. --- ### 3. Key Electronic Features * **No-Load Power Consumption:** Consumes less than **0.1W** when plugged in but not connected to a device, meeting green energy standards. * **Protection Circuitry:** * **Short Circuit Protection (SCP):** Continuous, self-recovering. * **Over Voltage Protection (OVP):** Protects the connected device if the internal regulator fails. * **Over Current Protection (OCP):** Limits current to prevent overheating. * **Interchangeable Blades:** The "R" suffix indicates a design that supports interchangeable AC blades (US, EU, UK, AU), making it suitable for international use. --- ### 4. Technical Comparison | Feature | WSX120-2000-R Value | | :--- | :--- | | **Ripple & Noise** | 120 mVp-p (max) | | **Load Regulation** | ±5% | | **Operating Temp** | 0°C to +40°C | | **Safety Approvals** | UL/cUL, GS, RCM, CCC, PSE |