The **SDR2207-R80M** is a high-power, surface-mount (SMD) power inductor manufactured by Bourns. It is widely used in power management circuits for filtering, energy storage, and noise suppression. --- ## 1. Technical Specifications The following table highlights the core electrical and physical parameters of the SDR2207-R80M: | Parameter | Specification | | :--- | :--- | | **Inductance** | 0.8 µH | | **Tolerance** | ±20% | | **Case Size** | 2207 (approx. 22mm x 7mm) | | **DC Resistance (DCR)** | 3.5 mΩ (Max) | | **Rated Current (Irms)** | 22.0 A | | **Saturation Current (Isat)** | 40.0 A | | **Operating Temperature** | -40°C to +125°C | | **Shielding** | Non-Shielded | --- ## 2. Component Composition The "SDR2207-R80M" part number follows a specific naming convention: * **SDR**: Series designation (Surface Mount Power Inductor). * **2207**: Dimensions (approx. 22mm diameter, 7mm height). * **R80**: Inductance code where 'R' acts as a decimal point (0.8 µH). * **M**: Tolerance code (M = ±20%). ### Material Construction * **Core:** Ferrite core material, providing high permeability. * **Wire:** Enameled copper wire wound around the core. * **Terminals:** Lead-free (RoHS compliant) tin-plated terminals for soldering. --- ## 3. Key Electronic Functions The SDR2207-R80M performs three primary roles in an electronic assembly: 1. **Energy Storage:** In DC-DC converters (Buck/Boost), it stores energy in its magnetic field during the "on" cycle and releases it during the "off" cycle to maintain a steady output voltage. 2. **Filtering:** It acts as a low-pass filter, blocking high-frequency AC noise while allowing DC current to pass through. 3. **Current Regulation:** Due to its high saturation current (40A), it is capable of handling large surges without the inductance dropping significantly, preventing circuit failure. --- ## 4. Typical Applications Because of its high current rating and low DCR, this part is commonly found in: * **Power Supplies:** Input/output filters for switching power supplies. * **Industrial Electronics:** Motor control circuits and heavy-duty DC-DC converters. * **Battery Chargers:** High-speed charging circuits for large battery packs. * **Telecommunications:** Base station power modules.