## SD10-3R3-R Component Overview The **SD10-3R3-R** is a high-performance, low-profile, shielded drum core power inductor manufactured by **Eaton (formerly Coiltronics)**. It is widely used in power management circuits where space is limited and efficiency is critical. --- ### 1. Technical Specifications Below are the primary electrical and physical characteristics of the SD10-3R3-R: | Parameter | Specification | | :--- | :--- | | **Inductance** | 3.3 µH | | **Tolerance** | ±20% | | **Current Rating (Irms)** | 1.48 Amps | | **Saturation Current (Isat)** | 1.31 Amps | | **DC Resistance (DCR)** | 0.0864 Ohms (Typical) | | **Operating Temperature** | -40°C to +125°C | | **Package / Case** | SMD (5.2mm x 5.2mm x 1.0mm) | | **Shielding** | Shielded (Ferrite Drum Core) | --- ### 2. Key Features * **Low Profile:** With a maximum height of only 1.0mm, it is ideal for slim electronic devices like smartphones and tablets. * **Magnetic Shielding:** The ferrite drum core construction minimizes electromagnetic interference (EMI), which is vital for high-density PCB layouts. * **Construction:** It uses a high-density power design, providing a high current-carrying capacity relative to its small footprint. * **RoHS Compliant:** The "-R" suffix indicates that the part is lead-free and compliant with RoHS standards. --- ### 3. Common Applications The SD10-3R3-R is typically found in the following electronic circuits: 1. **DC-DC Converters:** Used as a storage element in buck, boost, or buck-boost regulators. 2. **Portable Electronics:** Integrated into mobile phones, digital cameras, and MP3 players. 3. **Computer Peripherals:** Used in HDDs, SSDs, and notebook power rails. 4. **LED Drivers:** Providing stable current for lighting applications. --- ### 4. Part Number Breakdown Understanding the nomenclature helps in selecting alternatives: * **SD10:** Series name (Shielded Drum, 1.0mm height). * **3R3:** Inductance value (3.3 microhenries). * **-R:** RoHS compliant.