## Detailed Overview of the ZWS75BAF-3/CO2 The **ZWS75BAF-3/CO2** is a high-reliability, open-frame AC-DC power supply manufactured by TDK-Lambda. This specific model belongs to the ZWS-BAF series, designed for industrial applications requiring high efficiency and a compact footprint. --- ### 1. Key Technical Specifications The following table outlines the core electronic parameters of this unit: | Parameter | Specification | | :--- | :--- | | **Input Voltage Range** | 85 - 265 VAC (47-63Hz) or 120 - 370 VDC | | **Output Voltage** | 3.3 VDC | | **Output Current** | 15.0 A | | **Maximum Power** | 49.5 Watts | | **Efficiency** | Approximately 76% | | **Cooling** | Convection Cooled | | **Operating Temperature** | -10°C to +70°C (with derating) | --- ### 2. Meaning of the Suffixes (/CO2) In the TDK-Lambda nomenclature, the suffixes indicate specific modifications to the standard ZWS75BAF-3 model: * **-3**: Indicates the nominal output voltage is **3.3V**. * **/CO2**: This signifies that the Printed Circuit Board (PCB) has a **Coating** applied to both sides. This coating provides protection against dust, humidity, and accidental short-circuits caused by environmental contaminants. --- ### 3. Electronic Design Features The ZWS75BAF series incorporates several advanced electronic design principles: #### Active Power Factor Correction (PFC) The unit features active PFC, ensuring compliance with EN61000-3-2 standards. This reduces harmonic current emissions and improves the overall efficiency of the power grid usage. #### Protection Circuitry The device includes multiple layers of electronic protection: * **Overcurrent Protection (OCP):** Automatically recovers after the fault condition is removed. * **Overvoltage Protection (OVP):** Shuts down the unit to prevent damage to the load if the output voltage exceeds safe limits (requires manual AC reset). #### Green Design It is designed for low "no-load" power consumption, making it suitable for applications focusing on energy conservation and "green" certifications. --- ### 4. Physical Layout and Connectivity | Component | Description | | :--- | :--- | | **Input Connector** | JST Header (typically VHR-5N) | | **Output Connector** | JST Header (typically VHR-6N) | | **Mounting** | Open Frame with 4 mounting holes for chassis integration | | **Dimensions** | 50 x 31.5 x 132 mm (approximate) | ---