The **FCR-K4-R/Q** refers to a high-speed, multi-pin electrical connector, commonly used in automotive electronics, specifically for high-frequency signal transmission (Fakra or HSD style families). These parts are engineered to maintain signal integrity in harsh environments. --- ### 1. Technical Specifications Overview The FCR-K4-R/Q is typically a **Code K** (defined by color and mechanical keying) High-Speed Data (HSD) connector. | Feature | Specification Details | | :--- | :--- | | **Connector Type** | HSD (High-Speed Data) 4-Pin | | **Coding** | Code K (Curry Yellow) | | **Orientation** | Right-Angle (R) / Quad (Q) Configuration | | **Impedance** | 100 $\Omega$ (Differential) | | **Frequency Range** | DC to 2.0 GHz (Commonly up to 6 GHz in advanced versions) | | **Data Rate** | Supports up to 1.6 Gbps - 6 Gbps | --- ### 2. Key Electronic Components The assembly of this part consists of several critical sub-components that ensure electrical performance: #### A. Central Contacts (Pins) * **Material:** Usually gold-plated copper alloy. * **Function:** There are 4 pins arranged in a quadraxial pattern to carry differential signals (LVDS, USB, or Ethernet). Gold plating minimizes contact resistance and prevents oxidation. #### B. Dielectric Insulator * **Material:** High-performance engineering plastic (e.g., LCP or PA66). * **Function:** Maintains the precise spacing between the four pins to ensure the 100-ohm differential impedance is constant, preventing signal reflections. #### C. Shielding (Outer Contact) * **Material:** Tin or Nickel-plated Zinc die-cast or copper alloy. * **Function:** Acts as a Faraday cage to protect signals from Electromagnetic Interference (EMI) and reduces Cross-talk between adjacent cables. --- ### 3. Application Use-Cases Because of its high data throughput and robust mechanical locking, it is primarily used in: 1. **Automotive Infotainment:** Connecting high-resolution displays to head units. 2. **ADAS (Advanced Driver Assistance Systems):** High-speed camera feeds for lane departure or 360-degree views. 3. **USB/Media Ports:** High-speed data links within the vehicle cabin. --- ### 4. Mechanical Coding (Code K) The "K" in the part number refers to the **Mechanical Keying**. In automotive standards, different colors and tab positions prevent "mis-mating" (plugging the wrong cable into the wrong port). * **Color:** Curry Yellow. * **Purpose:** Ensures that during assembly, a technician cannot accidentally plug a Camera cable into a Display port if they have different coding.