The **PJA100F-12-R** is an AC-DC enclosed switch-mode power supply manufactured by **Cosel**. It is designed for industrial applications requiring high reliability and a compact form factor. --- ## 1. Technical Specifications The following table outlines the core electronic parameters of the PJA100F-12-R: | Parameter | Specification | Details | | :--- | :--- | :--- | | **Output Voltage** | 12V DC | Adjustable via built-in potentiometer (10.8V - 13.2V) | | **Output Current** | 8.4A | Maximum continuous current | | **Power Rating** | 100.8W | Total output capacity | | **Input Voltage** | 85V - 264V AC | Universal input (also supports 120V - 370V DC) | | **Efficiency** | 85% - 87% | Depending on input voltage and load | | **Suffix "-R"** | Remote Control | Includes remote ON/OFF logic capability | --- ## 2. Key Electronic Components & Features ### A. Power Factor Correction (PFC) The PJA series includes **Active PFC** circuitry. This reduces harmonic distortion and ensures compliance with international standards like IEC61000-3-2. This is critical for industrial environments to prevent electrical noise from feeding back into the grid. ### B. Remote ON/OFF (The "-R" Suffix) The "R" in the model name indicates the inclusion of a dedicated remote control circuit. * **Mechanism:** Allows the power supply output to be toggled using an external signal without cutting the AC mains. * **Benefit:** Reduces wear on mechanical switches and allows for automated power sequencing via a PLC or microcontroller. ### C. Protection Circuits The unit integrates three primary protection mechanisms: 1. **Overcurrent Protection (OCP):** Automatically recovers when the fault condition is removed. 2. **Overvoltage Protection (OVP):** Shuts down the unit if the output exceeds approximately 115% of the rated voltage. 3. **Thermal Protection:** Safeguards against overheating due to poor ventilation or overloading. --- ## 3. Physical Layout & Mounting The PJA100F uses a high-density design to minimize its footprint. * **Cooling:** Convection cooled (no internal fan required), which increases the Mean Time Between Failures (MTBF) and ensures silent operation. * **Terminals:** M3.5 screw terminals for secure industrial wiring. * **EMI Filter:** Integrated EMI/EMC filtering to meet Class B emission standards. --- ## 4. Usage Considerations If you are integrating this into a PCB or system, note the following: * **Derating:** The output current must be derated if the ambient temperature exceeds 50°C. * **Isolation:** The unit provides 3,000V AC isolation between input and output, ensuring safety for downstream low-voltage electronics.