The **SD20-330-R** is a high-performance, low-profile power inductor manufactured by **Eaton (formerly Cooper Bussmann)**. It belongs to the SD20 series of surface-mount (SMD) power inductors. --- ### ## Technical Specifications The following table outlines the key electrical and physical characteristics of the SD20-330-R: | Parameter | Specification | | :--- | :--- | | **Inductance** | 33.0 µH | | **Tolerance** | ±20% | | **DC Resistance (DCR)** | 0.286 Ω (Typical) | | **RMS Current ($I_{rms}$)** | 0.81 Amps | | **Saturation Current ($I_{sat}$)** | 0.70 Amps | | **Operating Temperature** | -40°C to +125°C | | **Shielding** | Ferrite Drum Core (Shielded) | | **Package Size** | 5.2mm x 5.2mm x 2.0mm | --- ### ## Key Features 1. **Magnetic Shielding:** The part is magnetically shielded, which minimizes Electromagnetic Interference (EMI) with surrounding components on the PCB. 2. **Low Profile:** With a maximum height of 2.0mm, it is ideal for height-constrained applications like handheld electronics. 3. **Ferrite Core Construction:** Provides high efficiency and high saturation current capabilities for its size. 4. **RoHS Compliant:** The "-R" suffix indicates that the part is fully compliant with RoHS standards (Lead-free). --- ### ## Common Applications The SD20-330-R is primarily used in power management circuits where voltage conversion is required: * **DC-DC Converters:** Used as a storage element in Buck (Step-down) or Boost (Step-up) converters. * **Battery Powered Devices:** Ideal for smartphones, digital cameras, and tablets due to its small footprint. * **LED Drivers:** Used to stabilize current in lighting circuits. * **Computer Peripherals:** Found in hard disk drives and portable storage devices. --- ### ## Equivalent/Replacement Parts If the SD20-330-R is unavailable, the following series often serve as alternatives (subject to footprint verification): ```markdown 1. Würth Elektronik: WE-TPC Series (Size 5020) 2. Bourns: SRN5020 Series 3. TDK: VLS5020 Series ```