The **FCR-3B-R** is an electronic component, specifically a **Flat Cable Connector (D-Sub style)** often associated with Fujitsu or similar industrial electronics manufacturers. It is designed for IDC (Insulation Displacement Contact) termination with flat ribbon cables. Below is a detailed breakdown of its electronic characteristics and specifications. --- ### 1. General Specifications The FCR-3B-R belongs to the FCR series of D-subminiature connectors. These are widely used for board-to-cable or cable-to-cable connections in industrial automation and computing. | Feature | Specification | | :--- | :--- | | **Connector Type** | D-Subminiature (IDC Type) | | **Gender** | Female (Socket/Receptacle) | | **Number of Pins** | Typically 25 or 37 (depending on full part number suffix) | | **Termination Style** | IDC (Insulation Displacement) | | **Pitch** | 1.27mm (Ribbon Cable) / 2.77mm (D-Sub interface) | --- ### 2. Electrical Characteristics These parameters define the safe operating limits for the circuitry passing through the connector. * **Current Rating:** Typically 1A AC/DC. * **Voltage Rating:** 250V AC/DC. * **Contact Resistance:** 20mΩ Max (initial). * **Insulation Resistance:** 1000MΩ Min at 500V DC. * **Dielectric Withstanding Voltage:** 500V AC for 1 minute. --- ### 3. Material Composition The materials used ensure durability and signal integrity in electronic environments. | Component | Material | | :--- | :--- | | **Insulator** | Glass-filled PBT (UL94V-0 rated) | | **Contacts** | Copper Alloy | | **Contact Plating** | Gold over Nickel (in the mating area) | | **Shell** | Steel (Tin or Zinc plated) | --- ### 4. Key Electronic Features 1. **IDC Termination:** The "3B" designation often refers to the specific IDC mechanism that allows for mass termination of flat cables without stripping individual wires, ensuring consistent electrical contact across all pins. 2. **EMI/RFI Protection:** The metal shell provides a grounding path, which is crucial for reducing electromagnetic interference in sensitive electronic circuits. 3. **Polarization:** The D-shape design prevents incorrect mating (reverse polarity), protecting the electronic components on the PCB. --- ### 5. Application Areas * **Industrial Controllers:** Connecting PLCs to I/O modules. * **Telecommunications:** Data transmission lines using ribbon cables. * **Medical Equipment:** Internal wiring for diagnostic machinery where space-saving flat cables are required.