## SRP4020-R56M: Technical Overview The **SRP4020-R56M** is a high-current, shielded power inductor manufactured by **Bourns**. It belongs to the SRP4020 series, which is designed for high-density applications requiring low noise and high efficiency. --- ### 1. Key Technical Specifications | Parameter | Value | Description | | :--- | :--- | :--- | | **Inductance** | 0.56 µH | Nominal inductance at 100 kHz / 1V | | **Tolerance** | ±20% | Inductance variance (indicated by 'M') | | **Irms (Heating Current)** | 7.0 A | Current causing 40°C temperature rise | | **Isat (Saturation Current)** | 10.0 A | Current causing 30% drop in inductance | | **DCR (Resistance)** | 10 mΩ (Max) | DC resistance of the internal wire | | **Operating Temp** | -45°C to +125°C | Including self-heating | --- ### 2. Physical Characteristics and Construction * **Shielding:** It is a **shielded** inductor. The metal alloy powder core surrounds the winding, which minimizes electromagnetic interference (EMI) and leakage flux. * **Core Material:** Uses a carbonyl powder core, which offers excellent saturation characteristics compared to traditional ferrite cores. * **Dimensions:** * **Length:** 4.4 mm * **Width:** 4.0 mm * **Height:** 2.0 mm (Low profile) * **Mounting:** SMD (Surface Mount Device) for automated PCB assembly. --- ### 3. Application Use Cases This component is primarily used in DC/DC converters and power management modules where space is limited but high current is required. 1. **Consumer Electronics:** Smartphones, tablets, and ultra-thin laptops. 2. **Power Supplies:** Low-voltage, high-current buck/boost converters. 3. **Distributed Power Systems:** Voltage Regulator Modules (VRMs). --- ### 4. Part Number Breakdown ```text SRP 4020 - R56 M | | | | | | | +-- Tolerance (M = ±20%) | | +----- Inductance (R56 = 0.56 µH) | +------------ Dimensions (4.0 x 4.0 x 2.0 mm) +----------------- Series Name (High Current Shielded Inductor) ```