The **PM20-R82M** is a surface-mount (SMD) molded chip inductor typically manufactured by **Bourns**. It belongs to the PM20 series, which is designed for high-frequency applications where miniaturization and reliability are critical. ### 1. General Specifications The part number can be decoded to understand its specific electronic properties: | Feature | Specification | Details | | :--- | :--- | :--- | | **Inductance** | 0.82 µH | The "R82" indicates the value in microhenries. | | **Tolerance** | ±20% | Represented by the "M" suffix. | | **Case Size** | 1210 (EIA) / 3225 (Metric) | Dimensions: 3.2mm x 2.5mm. | | **Core Material** | Phenolic/Ferrite | Optimized for high-frequency stability. | | **Mounting Type** | SMD/SMT | Surface mount technology. | --- ### 2. Technical Performance Characteristics These components are characterized by their ability to handle high frequencies and specific current limits. * **Self-Resonant Frequency (SRF):** Usually high (typically >100 MHz for this value), making it suitable for RF filtering. * **DC Resistance (DCR):** Low resistance to minimize power loss and heat generation. * **Rated Current:** The maximum continuous current the inductor can handle without exceeding its temperature rise limit (usually around 450mA to 500mA for this specific value). * **Operating Temperature:** Typically rated from **-55°C to +125°C**, suitable for industrial environments. --- ### 3. Application Use Cases The PM20-R82M is frequently found in the following electronic circuits: 1. **RF Circuits:** Used for impedance matching and signal decoupling in communication devices. 2. **Power Management:** Acts as a small filter inductor in DC-DC converters to smooth output voltage. 3. **EMI Suppression:** Filters out high-frequency noise from signal lines. 4. **Mobile Electronics:** Due to its 1210 footprint, it is ideal for space-constrained PCBs in handheld devices. --- ### 4. Part Number Breakdown `PM20 - R82 M` * **PM20:** Series identifier (Wirewound/Molded Chip Inductor). * **R82:** Inductance value code (R = decimal point; 0.82 µH). * **M:** Tolerance code (M = ±20%, K = ±10%, J = ±5%).