The designation **C20-R** typically refers to a specific standardized configuration of an **AC Power Inlet** (C20) with a **Right-Angle** (R) mounting or cable orientation. It is widely used in high-power networking and server equipment. --- ### 1. Technical Specifications The C20 is part of the **IEC 60320** international standard for power couplers. | Feature | Specification | | :--- | :--- | | **Connector Type** | C20 (Male Inlet) | | **Current Rating** | 16A (International) / 20A (North America) | | **Voltage Rating** | 250V AC | | **Temperature Rating** | Up to 70°C (Standard) | | **Pin Configuration** | 3-Prong (Line, Neutral, Ground) | | **Mounting Style** | Panel Mount or PCB Mount | ### 2. The "R" Designation (Right-Angle) In electronics parts catalogs, the **-R** suffix usually denotes the physical orientation of the component: * **Space Optimization:** Used in shallow server racks or tight enclosures where a straight connector would protrude too far. * **PCB Mounting:** If it is a board-level component, "-R" often indicates that the solder pins are bent at a 90-degree angle relative to the plug face. * **Cable Direction:** On pre-assembled power cords, it indicates the wire exits the plug at a right angle (Up, Down, Left, or Right). ### 3. Common Applications Because the C20 is rated for higher amperage (20A) than the standard household C14 (15A), it is found in: 1. **High-End Servers:** Blade servers and large storage arrays. 2. **PDU (Power Distribution Units):** The main power input for rack-mounted power strips. 3. **Uninterruptible Power Supplies (UPS):** Large battery backup units. 4. **Industrial Medical Equipment:** Large diagnostic imaging machines. ### 4. Mating Components The C20-R inlet must be paired with a **C19** female connector to function. ```markdown [ Male C20 Inlet ] <---> [ Female C19 Connector ] ``` ---