## SD18-100-R: Inductor Technical Overview The **SD18-100-R** is a high-power density, low-profile shielded drum core inductor manufactured by **Eaton (formerly Coiltronics)**. It is part of the SD series designed for applications where space is limited and electromagnetic interference (EMI) must be minimized. --- ### 1. Key Technical Specifications | Parameter | Value | | :--- | :--- | | **Inductance** | 10.0 µH | | **Tolerance** | ±20% | | **DC Resistance (DCR)** | 0.126 Ω (Max) | | **Irms (Current Rating)** | 1.34 A | | **Isat (Saturation Current)** | 1.38 A | | **Self-Resonant Frequency** | 22 MHz | | **Operating Temperature** | -40°C to +125°C | | **Package / Case** | 5.2mm x 5.2mm x 1.8mm | --- ### 2. Core Features * **Magnetic Shielding:** The "SD" stands for Shielded Drum. This construction ensures that the magnetic flux is contained within the component, preventing interference with neighboring components on the PCB. * **Low Profile:** With a maximum height of **1.8mm**, it is ideal for thin consumer electronics like smartphones, tablets, and wearable tech. * **Ferrite Core Material:** Provides high efficiency and low core losses at high frequencies. * **Surface Mount (SMD):** Designed for automated pick-and-place assembly. --- ### 3. Application Use Cases The SD18-100-R is primarily used in power management circuits, specifically: 1. **DC-DC Converters:** Used as an energy storage element in Buck, Boost, and SEPIC converters. 2. **LED Drivers:** Provides stable current for backlight lighting in mobile devices. 3. **Noise Filtering:** Acts as a low-pass filter to smooth out ripples in power supply lines. 4. **Battery Powered Devices:** High efficiency helps in extending the battery life of portable electronics. --- ### 4. Part Number Breakdown | Prefix | Series | Size Code | Inductance | RoHS | | :--- | :--- | :--- | :--- | :--- | | **SD** | Shielded Drum | **18** (1.8mm height) | **100** (10 x 10^0 = 10µH) | **-R** (RoHS Compliant) | ---