The **DMF-XX-R-N-HT** is a specific series designation for high-performance board-to-board or cable-to-board connectors, typically associated with the **Dual-Row Micro-Fit** (or similar micro-pitch) connector family. These components are designed for applications requiring high reliability, high-temperature resistance, and dense signal/power distribution. --- ### Part Number Breakdown (Typical) While specific manufacturers (like Samtec or Cvilux) may have slight variations, the nomenclature generally follows this logic: | Code | Component Segment | Description | | :--- | :--- | :--- | | **DMF** | Series Prefix | Dual-row, Micro-pitch, Female/Male connector series. | | **XX** | Pin Count | Represents the total number of positions (e.g., 04, 10, 20). | | **R** | Orientation | Usually indicates **Right-Angle** mounting to the PCB. | | **N** | Polarization/Locking | Often indicates a "Non-polarized" or specific "Notch" locking mechanism. | | **HT** | Temperature Rating | Stands for **High Temperature** (capable of withstanding reflow soldering). | --- ### Technical Specifications These parts are engineered for industrial and automotive-grade environments. #### 1. Material & Durability * **Housing:** Liquid Crystal Polymer (LCP) or high-temp Nylon, rated for UL 94V-0. * **Contacts:** Phosphor Bronze or Copper Alloy with Gold or Tin plating options. * **Temperature Range:** Typically **-55°C to +125°C**, making them suitable for "under-the-hood" or industrial furnace control applications. #### 2. Electrical Characteristics * **Current Rating:** Generally 2A to 5A per pin (depending on pitch and wire gauge). * **Voltage Rating:** Typically 250V AC/DC. * **Contact Resistance:** Low milliohm range (e.g., < 20mΩ). #### 3. Mechanical Features * **Pitch:** Usually 1.27mm, 2.00mm, or 3.00mm (Micro-pitch). * **Mounting Type:** Through-hole or SMT (Surface Mount Technology), specifically designed for lead-free solder profiles. --- ### Common Applications * **Industrial Automation:** PLCs, sensor arrays, and robotics. * **Automotive Electronics:** Infotainment systems and lighting controls. * **Telecommunications:** Compact server blades and networking hubs. * **Medical Devices:** Handheld diagnostic tools requiring robust vibrations resistance. --- ### Implementation Example (PCB Footprint) ```c // Example of a Right-Angle (R) Header Pinout configuration [ Row A ] 1 3 5 7 ... (XX-1) | | | | [ Row B ] 2 4 6 8 ... (XX) ```