## Overview of SD53-2R0-R The **SD53-2R0-R** is a high-power, low-profile, shielded surface-mount (SMD) inductor. It belongs to the **SD53 series** manufactured by **Eaton (formerly Cooper Bussmann)**. These inductors are specifically designed for applications where space is limited and electromagnetic interference (EMI) must be minimized. --- ### Key Specifications Below are the primary technical parameters for the SD53-2R0-R: | Parameter | Value | | :--- | :--- | | **Inductance** | 2.0 µH | | **Tolerance** | ±20% | | **DC Resistance (DCR)** | 0.0215 Ω (Max) | | **RMS Current (Irms)** | 3.22 A | | **Peak Current (Isat)** | 3.68 A | | **Shielding** | Ferrite Drum Core (Shielded) | | **Operating Temperature** | -40°C to +125°C | --- ### Technical Characteristics 1. **Magnetic Shielding:** The "SD" in the part number stands for **Shielded Drum**. The ferrite core construction limits the magnetic flux lines, which prevents the inductor from interfering with nearby sensitive components on the PCB. 2. **Saturation Current (Isat):** With an Isat of 3.68A, this part can handle significant current spikes before the inductance drops by 30%. This makes it robust for power management tasks. 3. **Low Profile Construction:** The "53" designation refers to the physical dimensions (approximately 5.2mm x 5.2mm x 3.0mm). Its small height is ideal for thin consumer electronics. 4. **Material Composition:** The suffix **-R** indicates that the part is fully **RoHS compliant**, utilizing lead-free solder and environmentally friendly materials. --- ### Common Applications The SD53-2R0-R is typically found in high-efficiency power circuits: * **DC-DC Converters:** Used as the energy storage element in buck (step-down) or boost (step-up) converters. * **Battery Powered Devices:** Ideal for smartphones, tablets, and wearables due to its small footprint. * **Computer Peripherals:** Used in hard disk drives (HDDs) and graphic card power phases. * **LED Drivers:** Provides stable current filtering for lighting applications. --- ### Typical Circuit Implementation In a standard buck converter application, the inductor is placed after the switching transistors to smooth out the current: ```c [Input Voltage] ----> [Switching MOSFET] ----+---- [SD53-2R0-R Inductor] ----> [Vout] | [Flyback Diode] | [GND] ```