## SD52-1R2-R Electronic Component Overview The **SD52-1R2-R** is a high-power, low-profile, shielded surface-mount (SMD) inductor. It belongs to the **SD52 Series** manufactured by **Eaton (formerly Cooper Bussmann)**. These inductors are primarily designed for DC-DC converter applications where space is limited and high efficiency is required. --- ### 1. Key Specifications The technical parameters define how the component behaves within a circuit. Below are the specific values for the `1R2` variant: | Parameter | Value | | :--- | :--- | | **Inductance** | 1.2 µH | | **Tolerance** | ±20% | | **DC Resistance (DCR)** | 0.0248 Ω (Typical) | | **Rated Current (Irms)** | 3.38 Amps | | **Saturation Current (Isat)** | 4.86 Amps | | **Operating Temperature** | -40°C to +125°C | | **Shielding** | Magnetic Shielded | --- ### 2. Physical Characteristics The SD52 series is known for its "Drum Core" construction wrapped in a magnetic epoxy to reduce EMI (Electromagnetic Interference). * **Dimensions:** Approximately 5.2mm x 5.2mm. * **Height:** 2.0mm maximum (Low profile). * **Package Type:** SMD (Surface Mount Device). * **Finish:** Ferrite core with copper wire, RoHS compliant. --- ### 3. Functional Breakdown #### A. Magnetic Shielding The "-R" suffix often indicates RoHS compliance, but the "SD" structure itself incorporates a ferrite shield. This ensures that the magnetic flux remains contained within the inductor, preventing interference with nearby sensitive components on the PCB. #### B. Saturation Current (Isat) The Isat of **4.86A** indicates the point at which the inductance drops by 30%. This is a critical metric for power supplies to ensure the inductor doesn't lose its "choke" properties under heavy load. #### C. Typical Applications * **Mobile Devices:** Mobile phones, tablets, and handheld GPS. * **Computing:** Next-generation microprocessors and VRM (Voltage Regulator Modules). * **DC-DC Converters:** Buck, Boost, and SEPIC topologies. * **LCD Displays:** Powering LED backlighting. --- ### 4. Part Number Decoder Understanding the Eaton naming convention helps in identifying similar parts: | Segment | Meaning | | :--- | :--- | | **SD** | Series Name (Shielded Drum Core) | | **52** | Size Dimension (5.2mm footprint) | | **1R2** | Inductance Value (1.2 microhenries) | | **-R** | RoHS Compliant | ---