The **2UDS-C3-R** is a specific model identifier for a **redundant power supply module**, commonly used in industrial servers, network storage (NAS), and rackmount chassis. This part is typically manufactured by brands like **SureStar** or used in **Chenbro** enclosures. --- ## 🛑 Technical Specifications The "2UDS" series generally refers to a 2U Form Factor Dual (Redundant) Power Supply. | Feature | Specification Details | | :--- | :--- | | **Form Factor** | 2U Redundant (Fits 2U Rackmount Chassis) | | **Input Voltage** | 100V - 240V AC (Universal Input) | | **Output Power** | Typically 300W to 500W (Model dependent) | | **Efficiency** | Often 80 PLUS certified | | **Cooling** | Dual ball-bearing fans (usually 38mm or 40mm) | | **Hot-Swappable** | Yes (Can be replaced while the system is running) | --- ### 🛠️ Key Electronic Components The internal architecture of the 2UDS-C3-R consists of several critical stages: 1. **EMI Filter Stage:** - Prevents electromagnetic interference from the power line from entering the PSU and vice versa. - Uses X and Y capacitors and common-mode chokes. 2. **PFC (Power Factor Correction):** - Most "C3" variants include Active PFC to ensure high efficiency and stable power delivery under varying loads. 3. **DC-to-DC Converters:** - These modules convert the primary high voltage into stable +3.3V, +5V, and +12V rails. 4. **Protection Circuitry (IC Based):** - **OVP:** Over Voltage Protection. - **OCP:** Over Current Protection. - **SCP:** Short Circuit Protection. --- ### 🔌 Pinout and Connectivity The "R" in the suffix usually denotes the **Redundant** module interface. Unlike a standard ATX power supply, this module connects to a **Power Distribution Board (PDB)** via a specialized gold-finger edge connector rather than a direct cable harness. | Component | Function | | :--- | :--- | | **Gold Finger Connector** | Interfaces with the backplane for load sharing. | | **LED Indicators** | Green (OK), Amber/Red (Fail), Blinking (Standby). | | **TTL Signal Pins** | Provides status signals (PS-ON, PW-OK) to the motherboard. | --- ### ⚠️ Common Use Cases * **Server Maintenance:** Replacing a failed module in a dual-supply setup to restore redundancy. * **Industrial Automation:** Powering high-availability controllers that cannot afford downtime. * **Network Infrastructure:** Used in core switches or firewalls.