The **AISC-0805-R47** is a specific electronic component belonging to the family of **Surface Mount Device (SMD) Inductors**. It is widely used in high-frequency circuits for signal filtering and impedance matching. Below is a detailed breakdown of its specifications and characteristics. --- ### 1. Part Number Deciphering To understand the part, we must break down the nomenclature: | Code Segment | Meaning | Description | | :--- | :--- | :--- | | **AISC** | Series | Wire-Wound Ceramic Chip Inductor series from Abracon. | | **0805** | Case Size | Imperial dimensions (0.08 x 0.05 inches) or 2012 in Metric. | | **R47** | Inductance | The "R" acts as a decimal point. **0.47 µH** (470 nH). | --- ### 2. Technical Specifications The typical parameters for this specific 0.47 µH inductor are outlined below: | Parameter | Typical Value | | :--- | :--- | | **Inductance** | 0.47 µH (470 nH) | | **Tolerance** | Usually ±5% (J) or ±10% (K) | | **Quality Factor (Q)** | High (typically > 45 at 100MHz) | | **Self-Resonant Frequency (SRF)** | ~375 MHz to 500 MHz | | **DC Resistance (DCR)** | ~1.10 Ω (Maximum) | | **Rated Current (Idc)** | ~400 mA | | **Operating Temperature** | -40°C to +125°C | --- ### 3. Key Construction Features * **Ceramic Core:** Unlike ferrite cores, the ceramic body provides excellent thermal stability and very high SRF, making it ideal for RF (Radio Frequency) applications. * **Wire-Wound Technology:** Fine copper wire is wound around the ceramic core, which offers a higher Q-factor and higher current carrying capacity compared to multilayer chip inductors. * **Encapsulation:** Often coated with epoxy or a specialized resin to protect the windings from environmental factors and mechanical stress. ### 4. Common Applications * **RF Tuning:** Used in resonance circuits for wireless communication. * **Impedance Matching:** Ensuring maximum power transfer between stages in RF amplifiers. * **Filtering:** Used in low-pass or high-pass filters to eliminate high-frequency noise in GPS, Bluetooth, and Wi-Fi modules. * **Mobile Devices:** Power management in smartphones where space is limited. --- ### 5. Footprint (0805 Imperial) If you are designing a PCB, the physical dimensions are: * **Length:** 2.00 mm * **Width:** 1.25 mm * **Height:** 1.20 mm (approx)