The **DMF-XX-R-N** is a specific series identifier typically associated with **D-Subminiature (D-Sub) high-density connectors**. These are widely used in industrial, telecommunications, and computing applications for signal and power transmission. Below is a detailed breakdown of its electronic characteristics and specifications. ### 1. Component Overview The "XX" in the part number usually represents the **number of pins** (e.g., 09, 15, 25, 37, or 50). The "R" and "N" suffixes generally denote specific physical orientations and plating materials. | Feature | Description | | :--- | :--- | | **Connector Type** | D-Subminiature (High Density or Standard) | | **Mounting Type** | Through-hole (Right Angle / Vertical) | | **Contact Gender** | Male (Plug) or Female (Socket) | | **Plating** | Nickel (N) / Gold (G) options | --- ### 2. Electrical Specifications These connectors are designed to handle low-voltage signals with high reliability. * **Current Rating:** Typically 3A to 5A per contact. * **Voltage Rating:** 250V AC/DC. * **Insulation Resistance:** $\ge$ 1000 M$\Omega$ at 500V DC. * **Contact Resistance:** $\le$ 20 m$\Omega$ (initial). * **Dielectric Strength:** 1000V AC for 1 minute. --- ### 3. Physical & Material Composition The build quality of the DMF series ensures durability under mechanical stress. | Part | Material | | :--- | :--- | | **Insulator** | PBT (Polybutylene Terephthalate) or Nylon-9T (High Temp) | | **Contact Material** | Copper Alloy (Brass or Phosphor Bronze) | | **Shell** | SPCC (Steel) with Nickel or Tin plating | | **Flammability** | UL 94V-0 Rated | --- ### 4. Common Pin Configurations High-density D-subs pack more pins into standard shell sizes compared to traditional D-subs. ```text Shell Size | Standard Pins | High Density (DMF Equivalent) -----------|---------------|------------------------------ E | 9 | 15 A | 15 | 26 B | 25 | 44 C | 37 | 62 ``` --- ### 5. Application Areas * **Industrial PC (IPC):** Used for RS-232, RS-422, or RS-485 serial communication. * **VGA Interfaces:** Many 15-pin DMF-type connectors serve as analog video ports. * **Automation:** Interfacing PLCs (Programmable Logic Controllers) with HMI panels. * **Networking:** Legacy router and switch console ports.