The **SD14-R87-R** is a high-performance, surface-mount (SMD) power inductor from the SD series, typically manufactured by **Eaton (formerly Coiltronics/Cooper Bussmann)**. It is specifically designed for high-density power applications where space and efficiency are critical. --- ## 1. Technical Specifications The part number "R87" indicates the inductance value, while the "-R" suffix denotes RoHS compliance. | Parameter | Specification | | :--- | :--- | | **Inductance** | 0.87 µH (Microhenries) | | **Tolerance** | ±20% | | **DC Resistance (DCR)** | ~31.8 mΩ (Max) | | **Saturation Current ($I_{sat}$)** | ~3.34 A | | **RMS Current ($I_{rms}$)** | ~2.32 A | | **Package Size** | SD14 (5.2 x 5.2 x 1.45 mm) | | **Operating Temperature** | -40°C to +125°C | --- ## 2. Key Physical Features * **Low Profile:** The "14" in the series name refers to its height (approx. 1.45 mm), making it ideal for ultra-thin electronics like tablets and smartphones. * **Shielded Construction:** It features magnetic shielding to minimize Electromagnetic Interference (EMI), which is vital for preventing noise in nearby circuits. * **Ferrite Core:** Utilizes a ferrite core material characterized by low core losses at high frequencies. --- ## 3. Common Applications This specific inductor is generally found in DC-DC converters and power management modules. * **Mobile Devices:** Powering CPUs and GPUs in handheld electronics. * **VRMs (Voltage Regulator Modules):** Used in buck, boost, and SEPIC topologies. * **Noise Filtering:** Acts as an LC filter component to smooth out ripple current in power supplies. * **IoT Sensors:** Provides stable power in compact, battery-operated sensors. --- ## 4. Understanding the Part Number Structure To identify similar parts in the series, you can break down the code as follows: 1. **SD:** Series name (Shielded Drum Core). 2. **14:** Size code (Physical dimensions of the footprint and height). 3. **R87:** Inductance value (R = decimal point; thus, 0.87 µH). 4. **-R:** RoHS compliant (Lead-free). ---