### Overview of the DR73-102-R Inductor The **DR73-102-R** is a high-power density, shielded drum core inductor manufactured by **Eaton (formerly Bussmann/Coiltronics)**. It is part of the DR series, which is specifically designed for surface-mount applications requiring high efficiency and low electromagnetic interference (EMI). --- ### Technical Specifications The following table summarizes the key electrical and physical characteristics of the DR73-102-R: | Parameter | Specification | | :--- | :--- | | **Inductance** | 1000 µH (1.0 mH) | | **Tolerance** | ±20% | | **Current Rating (Irms)** | 0.231 Amperes (231 mA) | | **Saturation Current (Isat)** | 0.306 Amperes (306 mA) | | **DC Resistance (DCR)** | 4.41 Ohms (Max) | | **Operating Temperature** | -40°C to +125°C | | **Shielding** | Ferrite Core (Shielded) | | **Package / Case** | 7.60mm x 7.60mm x 3.55mm | --- ### Key Features 1. **Magnetic Shielding:** The ferrite drum core is enclosed in a sleeve, which significantly reduces EMI. This makes it ideal for use near sensitive components. 2. **High Inductance:** At 1000 µH, this part is used for filtering or energy storage in circuits where a significant amount of inductance is needed in a small footprint. 3. **Reflow Compatibility:** The materials are designed to withstand the high temperatures of lead-free SMT (Surface Mount Technology) reflow soldering. 4. **Halogen Free:** The "R" suffix typically denotes RoHS compliance and halogen-free construction. --- ### Common Applications The DR73-102-R is commonly integrated into the following systems: * **DC-DC Converters:** Used as a storage inductor in buck, boost, or SEPIC converters. * **Noise Filtering:** Acts as a low-pass filter for power supply lines to remove high-frequency noise. * **Battery Powered Equipment:** Its compact size and efficiency are suited for handheld electronics. * **Computer Peripherals:** Used in local power regulation on motherboards or expansion cards. --- ### Component Identification (Part Number Breakdown) ```text DR 73 - 102 - R | | | | | | | └── RoHS Compliant | | └── Inductance Code (10 x 10^2 = 1000 µH) | └── Size Code (approx. 7.6mm x 3.5mm) └── Series Name (Drum Core, Shielded) ```