The **SD7030-220-R** is a specific model of a surface-mount (SMD) shielded power inductor manufactured by **Eaton (formerly Cooper Bussmann)**. It is part of the SD7030 series, known for its low profile and high power density. --- ### 1. Key Technical Specifications The part number itself contains encoded information about its electrical characteristics. | Parameter | Value | Description | | :--- | :--- | :--- | | **Inductance** | 22 µH | The nominal inductance value. | | **Tolerance** | ±20% | The allowable variance from the nominal value. | | **DC Resistance (DCR)** | 0.088 Ω (Typ) | The internal resistance; lower is better for efficiency. | | **Isat (Saturation Current)** | 1.48 A | The current at which inductance drops by 30%. | | **Irms (RMS Current)** | 1.83 A | The continuous current allowed based on temperature rise (40°C). | | **Shielding** | Shielded | Ferrite drum core with a ring to minimize EMI. | --- ### 2. Physical Characteristics The "7030" in the name refers to the package dimensions, which are critical for PCB layout design. * **Length/Width:** ~7.0 mm x 7.0 mm * **Height:** 3.0 mm (Max) * **Mounting Type:** Surface Mount Device (SMD/SMT) * **Core Material:** Ferrite --- ### 3. Part Number Breakdown The nomenclature follows this logic: 1. **SD:** Series name (Shielded Drum inductor). 2. **7030:** Physical size (7.0mm x 3.0mm). 3. **220:** Inductance code (22 followed by 0 zeros = 22 µH). 4. **R:** RoHS compliant. --- ### 4. Common Applications Due to its shielding and power handling, this component is typically found in: * **DC-DC Converters:** Used as an energy storage element in buck, boost, or SEPIC converters. * **Power Supplies:** Filtering noise in laptop adapters or industrial power bricks. * **Consumer Electronics:** Used in LED drivers, handheld devices, and video cameras where space is limited but EMI protection is required. ---