The **SRP4020CC-R56M** is a high-current, shielded power inductor manufactured by Bourns. It is part of the SRP4020CC series, designed specifically for high-density power applications where space is limited and efficiency is critical. --- ### 1. Technical Specifications The part number follows a specific coding convention that identifies its physical and electrical characteristics. | Parameter | Value / Specification | | :--- | :--- | | **Inductance** | 0.56 µH (Microhenries) | | **Tolerance** | ±20% (indicated by 'M') | | **DC Resistance (DCR)** | ~7.2 mΩ (Typical) / 8.6 mΩ (Max) | | **Saturation Current ($I_{sat}$)** | ~11.0 Amperes | | **Heating Current ($I_{rms}$)** | ~9.0 Amperes | | **Operating Temperature** | -55°C to +125°C | | **Construction** | Carbonyl Powder Core (Shielded) | --- ### 2. Physical Characteristics The **4020** in the part number refers to the metric dimensions of the component footprint. * **Size (LxWxH):** Approximately 4.0 mm x 4.0 mm x 2.0 mm. * **Mounting Type:** Surface Mount (SMD). * **Shielding:** Shielded construction, which minimizes Electromagnetic Interference (EMI) to surrounding components. --- ### 3. Key Applications Because of its low DCR and high saturation current, this inductor is commonly used in: * **DC/DC Converters:** Point-of-load (POL) power supplies. * **Consumer Electronics:** Smartphones, tablets, and laptops. * **Distributed Power Systems:** Managing voltage rails for CPUs and GPUs. --- ### 4. Part Number Breakdown ```text SRP 4020 CC - R56 M | | | | | | | | | +-- Tolerance (M = ±20%) | | | +----- Inductance Value (R56 = 0.56 µH) | | +---------- Material/Series Code (Carbonyl Powder) | +--------------- Dimensions (4.0 x 2.0 mm) +-------------------- Series Name (High Current Inductor) ```