## Technical Overview: Bourns CM252016-R82M The **CM252016-R82M** is a surface-mount (SMD) wirewound chip inductor manufactured by **Bourns**. It belongs to the CM252016 series, which is characterized by its compact 1008 (2520 metric) size and high-frequency performance. ### 1. Key Specifications The following table outlines the primary electrical and physical characteristics of this component: | Parameter | Value | | :--- | :--- | | **Inductance** | 0.82 µH | | **Tolerance** | ±20% (indicated by 'M') | | **Case Size** | 1008 (2520 Metric) | | **DC Resistance (DCR)** | 0.95 Ohms (Max) | | **Rated Current (Idc)** | 225 mA | | **Self-Resonant Frequency (SRF)** | 145 MHz (Min) | | **Q Factor (Min)** | 25 @ 25.2 MHz | | **Operating Temperature** | -40°C to +125°C | --- ### 2. Part Number Breakdown Understanding the nomenclature helps in identifying variants within the same series: * **CM**: Series prefix for Wirewound Chip Inductors. * **252016**: Physical dimensions (2.5mm x 2.0mm x 1.6mm). * **R82**: Inductance code (R82 = 0.82 µH). * **M**: Tolerance code (M = ±20%). --- ### 3. Construction and Materials The device is built using a **wirewound** construction on a non-magnetic (phenolic) or ferrite core, depending on the specific inductance range. * **Termination:** High-quality solder-plated copper leads designed for reflow soldering. * **Encapsulation:** The coil is typically protected by an epoxy resin or molded body to provide mechanical stability and protection against environmental factors. --- ### 4. Typical Applications Due to its high Q-factor and stable performance at high frequencies, the CM252016-R82M is commonly used in: 1. **RF Communication:** Mobile phones, GPS receivers, and Wi-Fi modules. 2. **Signal Conditioning:** Filtering and matching circuits in high-frequency signal paths. 3. **Consumer Electronics:** Wearables and handheld devices where space is at a premium. 4. **Oscillators:** Serving as a frequency-determining element in LC circuits.