The **PM1008-R22K-RC** is a high-frequency surface-mount (SMD) wire-wound chip inductor. It is commonly used in RF (Radio Frequency) circuits for filtering, impedance matching, and resonance. --- ### 1. Part Number Breakdown Understanding the nomenclature helps identify the component's specific characteristics: | Component Segment | Value | Description | | :--- | :--- | :--- | | **PM** | Series | Bourns PM Series (Wire-wound Inductor) | | **1008** | Case Size | EIA 1008 (Metric 2520) | | **R22** | Inductance | 0.22 µH (220 nH) | | **K** | Tolerance | ±10% | | **RC** | Compliance | RoHS Compliant | --- ### 2. Technical Specifications These parameters define how the inductor performs under electrical stress and high frequencies: * **Inductance:** 0.22 µH (Measured at 25.2 MHz). * **Q-Factor (Minimum):** 45 (at 25.2 MHz). A high Q-factor indicates low energy loss relative to energy stored. * **Self-Resonant Frequency (SRF):** 450 MHz (Min). This is the frequency limit where the part stops acting as an inductor and begins acting as a capacitor. * **DC Resistance (DCR):** 0.70 Ohms (Max). Lower DCR means less heat generation and better efficiency. * **Rated Current (Idc):** 450 mA. This is the maximum continuous current the part can handle without overheating. --- ### 3. Physical & Material Features * **Core Material:** Alumina (Ceramic). Ceramic cores provide excellent thermal stability and high SRF compared to ferrite cores. * **Construction:** Wire-wound. This construction provides higher Q-factors and higher current handling than multilayer chip inductors of the same size. * **Dimensions:** Approximately 2.5mm x 2.0mm x 1.6mm (Length x Width x Height). --- ### 4. Common Applications Due to its high frequency capabilities and ceramic core, this part is ideal for: 1. **RF Communication:** Cellular phones, GPS receivers, and Wi-Fi modules. 2. **Signal Conditioning:** High-speed signal filtering to remove noise. 3. **Impedance Matching:** Ensuring maximum power transfer between RF stages (e.g., between an antenna and a Power Amplifier). ---