The **SCIHP0735-R22N** is a high-current, surface-mount (SMD) power inductor commonly used in DC-DC converters and power supply modules. It belongs to the **Molded Power Inductor** category, known for its compact size and high efficiency. --- ### 1. Part Number Breakdown Understanding the nomenclature helps identify its physical and electrical characteristics: | Code Segment | Meaning | Description | | :--- | :--- | :--- | | **SCIHP** | Series Prefix | High-current, shielded molded inductor series. | | **0735** | Dimensions | Approx. **7.0 x 6.6 mm** footprint with a **3.5 mm** height. | | **R22** | Inductance Value | **0.22 µH** (R denotes the decimal point). | | **N** | Tolerance | Typically **±30%** (though some variants may be ±20%). | --- ### 2. Key Technical Specifications These parameters define how the component performs under electrical load: * **Inductance:** 0.22 µH * **DC Resistance (DCR):** Extremely low, typically around **1.2 mΩ to 2.0 mΩ**. This minimizes power loss through heat. * **Saturation Current ($I_{sat}$):** The current at which inductance drops (usually by 20-30%). For this part, it is typically around **30A - 40A**. * **Heating Current ($I_{rms}$):** The continuous current that causes a 40°C temperature rise. Usually rated around **20A - 25A**. * **Operating Temperature:** -55°C to +125°C. --- ### 3. Construction and Features The SCIHP0735 series utilizes specific manufacturing techniques to achieve its performance: 1. **Magnetic Shielding:** The coil is encapsulated in a metal iron powder core. This provides magnetic shielding, reducing Electromagnetic Interference (EMI) with neighboring components. 2. **Molded Design:** The "Molded" construction means the iron powder is pressed around the wire. This results in a very robust structure that resists mechanical shock and handles high-frequency noise better than traditional ferrite drum cores. 3. **Low Buzz Noise:** The solid structure minimizes "acoustic noise" (whining) caused by magnetostriction. --- ### 4. Common Applications Due to its high current handling and low profile, it is found in: * **Voltage Regulator Modules (VRMs):** Powering CPUs and GPUs in laptops and servers. * **DC-DC Converters:** Point-of-load (POL) power supplies. * **Battery Powered Devices:** High-efficiency power management systems. --- ### 5. Summary Table: Electrical Comparison | Parameter | Value (Approx) | Unit | | :--- | :--- | :--- | | Inductance | 0.22 | µH | | DCR (Max) | 2.0 | mΩ | | Saturation Current | 32 | A | | Size (L x W x H) | 7.3 x 6.6 x 3.5 | mm |