The **DR1050-220-R** is a high-performance, shielded power inductor designed by Eaton (formerly Cooper Bussmann). It belongs to the DR series, which is widely used in DC-DC converters and power supply applications. --- ### ## Technical Specifications Below are the primary electrical and physical characteristics of the DR1050-220-R: | Parameter | Value | | :--- | :--- | | **Inductance** | 22 µH | | **Tolerance** | ±20% | | **DC Resistance (DCR)** | 0.061 Ω (Typical) | | **Rated Current (Irms)** | 2.58 A | | **Saturation Current (Isat)** | 2.50 A | | **Self-Resonant Frequency** | 12 MHz (Typical) | | **Shielding** | Shielded (Magnetic) | | **Operating Temperature** | -40°C to +125°C | --- ### ## Key Features & Components 1. **Magnetic Shielding**: The "DR" series features a ferrite drum core with a ring core (shield). This minimizes **Electromagnetic Interference (EMI)**, making it suitable for noise-sensitive circuits. 2. **Size (1050 Dimensions)**: The name "1050" refers to its footprint. It measures approximately **10.5 mm x 10.3 mm** with a height of **5.0 mm**. 3. **Construction**: * **Core Material**: Ferrite, which provides high efficiency and low core losses. * **Windings**: High-quality copper wire designed to handle significant current without overheating. * **Terminations**: Lead-free, RoHS-compliant matte tin over copper. --- ### ## Typical Applications The DR1050-220-R is commonly found in the following electronic systems: * **DC-DC Converters**: Used as a storage element in Buck, Boost, or SEPIC converters. * **Computer Peripherals**: Powering hard drives, graphic cards, and motherboards. * **Industrial Electronics**: Used in power supplies for automation and control systems. * **Consumer Electronics**: Found in LED drivers and battery-powered portable devices. --- ### ## Part Number Breakdown Understanding the nomenclature helps in selecting alternatives: | Segment | Meaning | | :--- | :--- | | **DR** | Product Series (Drum Core, Shielded) | | **1050** | Size Code (approx. 10x10x5 mm) | | **220** | Inductance Code (22 followed by 0 zeros = 22 µH) | | **-R** | RoHS Compliant |