The part number **0412-R22** typically refers to a **Power Inductor**, commonly used in surface-mount technology (SMT) applications. Below is a detailed breakdown of its specifications and characteristics. --- ## 1. Technical Specification Breakdown The alphanumeric code describes the physical dimensions and the electrical properties of the component. | Parameter | Value | Description | | :--- | :--- | :--- | | **Series/Size** | 0412 | Refers to the physical footprint (approx. 4.0mm x 4.0mm x 1.2mm). | | **Inductance Value** | R22 | Represents **0.22 µH** (Microhenries). | | **Component Type** | Fixed Inductor | Specifically a molded power inductor. | | **Core Material** | Metal Alloy / Carbonyl Iron | High-saturation material used to handle high currents. | --- ## 2. Key Features Inductors in the 0412-R22 category are designed for high-efficiency power conversion. * **Compact Profile:** The "12" in 0412 usually signifies a height of 1.2mm, making it ideal for thin electronic devices like smartphones or laptops. * **High Saturation Current:** Because the inductance is low (0.22 µH), these parts are designed to handle high bursts of current without the magnetic core "saturating." * **Low DCR (DC Resistance):** They utilize thick copper windings to minimize energy loss as heat. * **Magnetic Shielding:** Most modern 0412 inductors are shielded to prevent Electromagnetic Interference (EMI) from affecting nearby components. --- ## 3. Common Applications These parts are vital components in **Voltage Regulator Modules (VRMs)** and **DC-DC Converters**. 1. **Mobile Electronics:** Power management in smartphones, tablets, and wearables. 2. **Computing:** Local power supply for CPUs, GPUs, and DDR memory. 3. **IoT Devices:** Used in small-scale power circuits where space is a premium. 4. **Automotive:** (If AEC-Q200 qualified) Used in infotainment and driver assistance sensors. --- ## 4. Typical Electrical Performance (Example) *Note: Exact values vary by manufacturer (e.g., Vishay, TDK, or Coilcraft).* | Attribute | Typical Rating | | :--- | :--- | | **Inductance Tolerance** | ±20% | | **Saturation Current (Isat)** | ~7.0A to 12.0A | | **Heat Rating Current (Irms)** | ~5.0A to 9.0A | | **Operating Temperature** | -40°C to +125°C |