The **MHO+18FDD-R** is a specific type of industrial-grade electrical connector, typically falling under the category of **High-Density Rectangular Connectors** or **D-Subminiature** variations used in heavy-duty electronic systems. Below is a breakdown of its electronic components, specifications, and architecture. --- ### 1. General Specifications This part is engineered for high-reliability signal transmission in environments where space and durability are critical. | Feature | Specification | | :--- | :--- | | **Connector Type** | Rectangular D-Sub / High Density | | **Number of Pins** | 18 Positions | | **Gender** | Female (Socket) | | **Mounting Type** | Right Angle (R) / PCB Through-Hole | | **Termination** | Solder | | **Shell Material** | Steel or Zinc Alloy (Nickel Plated) | --- ### 2. Key Electronic Components & Materials #### A. Contact Pins (The Conductive Core) * **Material:** Usually made of **Phosphor Bronze** or **Brass**. * **Plating:** The contact area is typically **Gold-plated** (over Nickel) to ensure low contact resistance and prevent oxidation over long periods. * **Rating:** Usually rated for **3A to 5A** per contact, depending on the wire gauge and heat dissipation. #### B. The Insulator (Dielectric Body) * **Material:** Thermoplastic (PBT) or Glass-filled Nylon. * **Function:** This provides high insulation resistance (typically >5000 MΩ) to prevent short-circuiting between the 18 pins. It is rated for high-temperature durability during the soldering process. #### C. The Metal Shield (EMI/RFI Protection) * The "MHO" prefix often refers to the **Metal Hood** or **Housing**. * **Function:** Acts as a Faraday cage to protect signals from Electromagnetic Interference (EMI) and Radio Frequency Interference (RFI). --- ### 3. Part Number Nomenclature Breakdown The code **MHO+18FDD-R** can be decoded as follows: 1. **MHO:** Indicates the series or the Metal Housing/Hood type. 2. **18:** The pin count (18 active contacts). 3. **F:** Female (Socket) connector type. 4. **DD:** Double Density (High-density spacing). 5. **R:** Right Angle orientation (for horizontal PCB mounting). --- ### 4. Technical Performance Data | Parameter | Value | | :--- | :--- | | **Voltage Rating** | 250V AC/DC | | **Contact Resistance** | < 15 mΩ | | **Operating Temperature** | -55°C to +105°C | | **Dielectric Strength** | 1000V AC for 1 minute | --- ### 5. Common Applications Due to the 18-pin configuration and metal shielding, these are frequently found in: * **Industrial Automation:** PLCs and sensor arrays. * **Telecommunications:** Data switching equipment. * **Medical Electronics:** Diagnostic imaging hardware requiring shielded signal paths. * **Aerospace:** Control panels where vibration resistance is required.