The part number **WRPPB-NJAR-R** typically refers to a high-performance **RF (Radio Frequency) Connector/Cable Assembly component**, often associated with the **W.FL** or **MHF** series of ultra-miniature interconnects used in wireless communication devices. Below is a detailed breakdown of the electronic specifications and characteristics associated with this type of part. --- ### 1. General Specifications These parts are designed for applications where space is extremely limited and high-frequency signal integrity is critical. | Feature | Typical Specification | | :--- | :--- | | **Connector Type** | Ultra-Miniature Pressure Contact / SMT | | **Impedance** | 50 Ohms (Standard) | | **Frequency Range** | DC to 6 GHz (Typical) | | **VSWR** | 1.3 Max (at 3 GHz) to 1.5 Max (at 6 GHz) | | **Mated Height** | Often < 1.5mm to 2.0mm | | **RoHS Status** | Compliant (indicated by the "-R" suffix) | --- ### 2. Key Electronic Components & Materials The performance of the **WRPPB** series relies on specific material science to minimize signal loss: * **Center Contact:** Usually made of Phosphor Bronze or Beryllium Copper with **Gold Plating** to ensure low contact resistance and prevent oxidation. * **Insulator:** High-temperature Engineering Plastic (LCP or PBT) to withstand Lead-Free reflow soldering temperatures. * **Outer Shell/Ground:** Copper alloy with Silver or Gold plating for superior EMI (Electromagnetic Interference) shielding. --- ### 3. Part Number Breakdown (Functional Logic) While specific to the manufacturer's catalog (often linked to vendors like Hirose or I-PEX equivalents), the coding generally follows this logic: * **WRPPB:** Product Series (Ultra-miniature RF board-to-board or board-to-film). * **NJ:** Interface style (Non-gendered or specific Jack orientation). * **AR:** Specific Arrangement or Angled Right (physical orientation). * **R:** Packaging designation (Tape & Reel) or RoHS compliance. --- ### 4. Common Applications Due to its small footprint and high-frequency capabilities, this part is used in: 1. **Mobile Devices:** Smartphones, tablets, and wearables (GPS/Wi-Fi antennas). 2. **IoT Modules:** Narrowband-IoT (NB-IoT) and LoRa modules. 3. **Automotive:** Infotainment systems and internal telematics. 4. **Miniature PC Hardware:** M.2 Wi-Fi cards and internal laptop antennas. --- ### 5. Technical Precautions * **Mating Cycles:** These connectors are designed for limited mating cycles (usually 20–30 cycles). Frequent unplugging can damage the gold plating and tension springs. * **Soldering:** Because of the small size, precision SMT (Surface Mount Technology) processes are required. Excess solder paste can cause "wicking," which shorts the RF signal to the ground shell.