The part number **0805F-R11J** typically refers to a **Wirewound Chip Inductor**. Based on standard naming conventions used by manufacturers like Fastron or similar electronic component suppliers, here is the detailed breakdown of its specifications. ### Part Number Breakdown | Component Segment | Value | Meaning | | :--- | :--- | :--- | | **0805** | Case Size | 2.0mm x 1.25mm (Imperial 0805) | | **F** | Series Type | Often denotes a Ferrite core or specific manufacturer series | | **R11** | Inductance | 0.11 µH (or 110 nH) | | **J** | Tolerance | ±5% | --- ### Technical Specifications The 0805F series is designed for high-frequency applications where a small footprint and stable performance are required. #### 1. Physical Characteristics * **Dimensions:** Approximately 2.0 x 1.25 x 1.25 mm. * **Construction:** Wirewound on a ceramic or ferrite body, providing better current handling and lower DC resistance compared to multilayer inductors. * **Terminations:** Usually gold-plated or tin-plated for excellent solderability. #### 2. Electrical Parameters * **Inductance:** 110 nH (Nanohenries). * **Tolerance:** ±5% (standard for precision RF tuning). * **Quality Factor (Q):** Typically high (Min 30-50 at specific frequencies), ensuring low signal loss. * **Self-Resonant Frequency (SRF):** Usually in the range of 900 MHz to 1.2 GHz. * **Rated Current:** Generally handles between 200mA to 600mA depending on the specific sub-series. * **DCR (DC Resistance):** Low resistance (often < 0.50 Ω) to minimize heat and power loss. --- ### Common Applications Due to its size and inductance value, the **0805F-R11J** is commonly found in: * **RF Transceivers:** Used in matching networks and filters. * **Mobile Communication:** Cellular base stations and handheld devices. * **Broadband Systems:** Cable modems and set-top boxes. * **Decoupling:** Filtering high-frequency noise in power supply lines. --- ### Comparison with Multilayer Inductors | Feature | Wirewound (0805F) | Multilayer | | :--- | :--- | :--- | | **Q Factor** | Higher (Better) | Lower | | **Current Handling** | Higher | Lower | | **Cost** | Slightly Higher | Lower | | **Precision** | Excellent | Moderate |