The **M2AS1-4424-R/N** is a specific model within the **M2AS series** of industrial-grade, high-density power supply units (PSU), typically manufactured by **SureStar (SevenTeam)** or similar industrial PC power suppliers. These are commonly used in server racks, storage arrays, and high-availability workstations. Below is the technical breakdown of its electronic components and specifications. --- ### 1. General Specifications | Feature | Description | | :--- | :--- | | **Form Factor** | 2U Mini-Redundant (Individual Module) | | **Max Power Output** | 400W to 420W (Continuous) | | **Input Voltage** | 90V - 264V AC (Universal Input) | | **Input Frequency** | 47Hz - 63Hz | | **Efficiency** | Often 80 PLUS Certified (Bronze or Silver level) | --- ### 2. Key Electronic Components & Features #### A. Active Power Factor Correction (PFC) The "AS" in the model name usually signifies **Active PFC**. * **Function:** It uses an electronic circuit (often a boost converter) to align the current waveform with the voltage waveform. * **Benefit:** Reduces harmonic distortion and ensures compliance with international standards like EN61000-3-2. #### B. Redundancy Logic (The "R" Suffix) The **-R** indicates this is a **Redundant** module. * **Hot-Swappable:** The rear interface uses a gold-finger connector (edge connector) instead of standard wires, allowing it to be swapped while the system is running. * **OR-ing Diodes/MOSFETs:** Internal circuitry prevents back-feeding; if one module fails, the other takes over the full load instantly without a system reboot. #### C. Cooling and Thermal Management * **Fan:** Equipped with a high-RPM 40mm ball-bearing fan. * **Speed Control:** Uses a thermal sensor (thermistor) to adjust fan speed based on internal temperatures, balancing noise with cooling efficiency. #### D. Protection Circuits The electronic design includes an **IC controller** that monitors for several critical states: 1. **OVP (Over Voltage Protection):** Shuts down if output exceeds safe levels. 2. **OCP (Over Current Protection):** Prevents damage during current spikes. 3. **SCP (Short Circuit Protection):** Latches the PSU off if a short is detected. --- ### 3. DC Output Rail Distribution The internal DC-DC conversion stage splits the power into the following standard rails: | Rail | Max Load (Typical) | Function | | :--- | :--- | :--- | | **+3.3V** | 20A - 25A | Logic circuits, RAM, Chipsets | | **+5V** | 20A - 25A | HDD/SSD Logic, USB ports | | **+12V** | 30A+ | CPU (EPS), GPU, Cooling Fans | | **-12V** | 0.5A | Legacy PCI slots / Serial ports | | **+5Vsb** | 3.0A | Standby power (Always on) | --- ### 4. Physical Connector Interface Since this is a module for a redundant cage, it does not have standard ATX cables attached to the module itself. * **Interface:** A proprietary high-current edge connector. * **Signals:** Includes `PS-ON` (Remote on/off), `PW-OK` (Power Good signal), and `I2C/PMBus` pins for digital communication to monitor health (fan speed, temp, and load) via the motherboard. ---