The **ZWS240BP-36/CO2** is a high-reliability, industrial-grade AC-DC embedded power supply manufactured by TDK-Lambda. This specific model is part of the ZWS-BP series, known for its high power density and ability to handle peak loads. ### Technical Specifications Overview | Parameter | Specification | | :--- | :--- | | **Output Voltage** | 36V DC | | **Output Power (Rated)** | 240W | | **Peak Power Capability** | Up to 480W (duration dependent) | | **Input Voltage Range** | 85 - 265 VAC (Universal Input) | | **Efficiency** | ~91% (typical at 200VAC) | | **Cooling** | Convection Cooled (no fans required) | | **Dimensions** | 84 x 42 x 180 mm (Open Frame) | --- ### Key Electronic Features & Component Designations #### 1. The "/CO2" Suffix Meaning The `/CO2` suffix indicates a specific **environmental coating**. The PCB (Printed Circuit Board) is treated with a **conformal coating** on the solder side. This provides: * Protection against moisture and humidity. * Resistance to dust and chemical contaminants. * Improved longevity in harsh industrial environments. #### 2. High Peak Power Circuitry Unlike standard power supplies, the "BP" series is designed with robust capacitors and power MOSFETs that allow for **200% peak loading**. * **Application:** Ideal for motors, solenoids, and actuators that require a high current surge during startup but lower power during steady-state operation. #### 3. Power Factor Correction (PFC) The unit includes an active PFC circuit (typically compliant with EN61000-3-2). This ensures: * Reduced harmonic current emissions. * Higher efficiency and lower strain on the AC mains. #### 4. Protection Mechanisms The internal electronic control system includes: * **Overcurrent Protection (OCP):** Constant current limiting with automatic recovery. * **Overvoltage Protection (OVP):** Shuts down the output to prevent damage to the load. * **Thermal Protection:** Sensors monitor heat sink temperatures to prevent catastrophic failure from overheating. --- ### Internal Component Layout (Typical) 1. **Input Filter:** EMI/RFI filtering components (X and Y capacitors, common mode chokes) to minimize electrical noise. 2. **Bulk Capacitor:** High-voltage electrolytic capacitor used to store energy for the PFC stage. 3. **Switching Transformer:** High-frequency transformer that provides galvanic isolation between the AC input and DC output. 4. **Output Rectifiers:** Low-loss diodes or synchronous rectifiers to convert high-frequency AC back to 36V DC.