The **1008F-R18M** is a specific part number for a **Surface Mount (SMD) Wire-wound Chip Inductor**. This component is widely used in high-frequency circuits, telecommunications, and signal processing. Below is a detailed breakdown of its specifications and characteristics. --- ### 1. Part Number Breakdown The nomenclature follows a standard industry format for inductors: | Segment | Meaning | Detail | | :--- | :--- | :--- | | **1008** | Case Size | 0.10 x 0.08 inches (approx. 2.5 x 2.0 mm) | | **F** | Type/Material | Often signifies Ferrite Core or a specific manufacturer series | | **R18** | Inductance Value | R denotes decimal point. **0.18 µH** (or 180 nH) | | **M** | Tolerance | ±20% | --- ### 2. Technical Specifications While exact values can vary slightly by manufacturer (such as API Delevan or Bourns), the typical specs for a 1008-size 0.18µH inductor are: * **Inductance:** 0.18 µH (180 nH) * **Tolerance:** ±20% (Standard for "M" suffix) * **Core Material:** Ferrite (usually indicated by the 'F'). Ferrite provides higher inductance values in a smaller footprint compared to ceramic. * **DC Resistance (DCR):** Typically low (between 0.15Ω to 0.50Ω), allowing for efficient power usage. * **Rated Current (Idc):** Generally ranges from 400mA to 800mA depending on the specific series. * **Self-Resonant Frequency (SRF):** High SRF (typically > 400 MHz), making it suitable for RF applications. --- ### 3. Key Applications Because of its small size and ferrite core, the 1008F-R18M is ideal for: 1. **RF Circuits:** Used in impedance matching and resonance circuits for wireless communication. 2. **Filtering:** Acting as a low-pass or band-pass filter to remove noise from signals. 3. **Decoupling:** Preventing high-frequency noise from traveling between different sections of a PCB. 4. **Mobile Electronics:** Used in smartphones, tablets, and GPS modules due to the compact 1008 form factor. --- ### 4. Physical Dimensions (Reference) | Dimension | Millimeters (mm) | Inches (in) | | :--- | :--- | :--- | | **Length (L)** | 2.50 ± 0.2 | 0.100 | | **Width (W)** | 2.00 ± 0.2 | 0.080 | | **Height (H)** | 1.60 ± 0.2 | 0.063 | ---