## Technical Overview of SRP4012TA-R22M The **SRP4012TA-R22M** is a high-performance, shielded power inductor manufactured by Bourns. It is specifically designed for high-current power supply applications where space is limited and reliability is critical. ### 1. Key Specifications | Parameter | Value | | :--- | :--- | | **Inductance** | 0.22 µH | | **Tolerance** | ±20% | | **DC Resistance (DCR)** | 4.8 mΩ (Typical) / 5.7 mΩ (Max) | | **Irms (Heating Current)** | 11.5 A | | **Isat (Saturation Current)** | 16.5 A | | **Operating Temperature** | -40 °C to +150 °C | | **Package Size** | 4.45 x 4.0 x 1.0 mm (approx.) | --- ### 2. Core Components and Materials * **Shielded Construction:** The inductor uses a magnetic alloy powder core. This construction provides excellent EMI (Electromagnetic Interference) shielding, preventing magnetic flux from interfering with neighboring components on the PCB. * **Carbonyl Powder Core:** The core material is formulated for high saturation current and low core losses at high frequencies. * **Lead-Free/RoHS Compliant:** The component meets modern environmental safety standards and is AEC-Q200 qualified, meaning it is tested for automotive-grade reliability. --- ### 3. Application Use Cases This specific inductor is typically found in the following electronic circuits: 1. **DC/DC Converters:** Used as an energy storage element in buck or boost converters. 2. **Mobile Electronics:** Ideal for smartphones and tablets due to its ultra-low profile (1.2 mm height). 3. **Automotive Systems:** Used in Driver Assistance Systems (ADAS) and infotainment due to its high temperature rating. 4. **CPU/GPU Power:** Handles the high-current demands of modern microprocessors. --- ### 4. Part Number Breakdown The part number follows a specific logic used by Bourns: | Segment | Meaning | | :--- | :--- | | **SRP** | Series Name (Shielded Power Inductor) | | **4012** | Dimensions (Approx. 4.0mm x 1.2mm height) | | **TA** | Automotive Grade (AEC-Q200 Qualified) | | **R22** | Inductance Value (R22 = 0.22 µH) | | **M** | Tolerance (M = ±20%) |