The **SD52-101-R** is a specific model of a **power inductor** manufactured by Eaton (formerly Bussmann). It belongs to the SD52 series, which are low-profile, shielded drum core inductors designed for space-constrained electronic circuits. --- ### 1. Key Technical Specifications The model number "101" defines the inductance value, while the "R" indicates RoHS compliance. | Parameter | Specification | | :--- | :--- | | **Inductance** | 100 µH | | **Tolerance** | ±20% | | **DC Resistance (DCR)** | 0.592 Ω (Typical) | | **Rated Current (Irms)** | 0.61 Amps | | **Saturation Current (Isat)** | 0.68 Amps | | **Shielding** | Magnetically Shielded | | **Package / Case** | SMD (Surface Mount Device) | | **Operating Temperature** | -40°C to +125°C | --- ### 2. Physical Characteristics The SD52 series is known for its "Drum Core" construction. * **Dimensions:** Approximately 5.2mm x 5.2mm with a height of 2.0mm. * **Shielding:** The magnetic shielding minimizes Electromagnetic Interference (EMI), preventing the inductor's magnetic field from affecting nearby sensitive components. * **Construction:** Ferrite drum core with a ferrite sleeve. --- ### 3. Electronic Functions and Applications The SD52-101-R is primarily used for energy storage and noise filtering in DC-DC power conversion circuits. #### Common Applications: * **Buck/Boost Converters:** Used in mobile phones, tablets, and handheld GPS units to regulate voltage. * **Filtering:** Acts as a low-pass filter to smooth out ripple current in power supplies. * **LED Drivers:** Provides constant current for lighting applications. * **Computer Peripherals:** Used in HDDs and SSDs for localized power management. --- ### 4. Part Number Breakdown Understanding the Eaton nomenclature helps in identifying variations: * **SD:** Series name (Shielded Drum). * **52:** Dimensions (approx. 5.2mm footprint). * **101:** Inductance code (10 + 1 zero = 100). * **R:** RoHS compliant (Lead-free). ---