## Overview of DR124-471-R The **DR124-471-R** is a high-power, shielded surface-mount (SMD) inductor manufactured by **Eaton (formerly Bussmann/Coiltronics)**. It is part of the DR series, which is specifically designed for high-density, high-efficiency power applications. --- ### Technical Specifications The following table outlines the primary electrical and physical characteristics of the component: | Parameter | Specification | | :--- | :--- | | **Inductance** | 470 µH (Microhenries) | | **Inductance Tolerance** | ±20% | | **DC Resistance (DCR)** | 0.730 Ω (Typical) / 0.880 Ω (Maximum) | | **Rated Current (Irms)** | 0.78 Amps | | **Saturation Current (Isat)** | 0.90 Amps | | **Operating Temperature** | -40°C to +125°C | | **Shielding** | Magnetically Shielded | | **Package Size** | 12.5mm x 12.5mm x 4.5mm | --- ### Key Features 1. **Magnetic Shielding:** The component is enclosed in a ferrite core, which significantly reduces Electromagnetic Interference (EMI). This makes it suitable for noise-sensitive circuits. 2. **High Power Density:** Despite its relatively small SMD footprint, it handles high saturation currents without a significant drop in inductance. 3. **Low DCR:** The low direct-current resistance ensures minimal power loss through heat, contributing to overall circuit efficiency. 4. **Ferrite Drum Core:** The construction uses a drum core with a ring sleeve to provide high energy storage capacity. --- ### Common Applications The DR124-471-R is typically found in power management circuits where high voltage/current regulation is required: * **DC-DC Converters:** Used in buck, boost, and SEPIC topologies. * **Computer Hardware:** Voltage Regulator Modules (VRMs) for laptops and servers. * **Industrial Electronics:** Power supplies for sensors and control units. * **Consumer Electronics:** High-end audio equipment and LED lighting drivers. --- ### Part Number Breakdown Understanding the nomenclature helps in selecting alternatives: * **DR:** Series name (Drum Core, Shielded). * **124:** Dimensions (approx. 12mm width, 4mm height). * **471:** Inductance code (47 + one zero = 470 µH). * **R:** RoHS compliant.