The **DR1030-330-R** is a high-performance, shielded power inductor manufactured by Eaton (formerly Bussmann). It is widely used in DC-DC converters and power management circuits. --- ### ## Technical Specifications Below are the primary electrical and physical characteristics of the component: | Parameter | Value | | :--- | :--- | | **Inductance** | 33 µH | | **Tolerance** | ±20% | | **DC Resistance (DCR)** | 0.165 Ohms (Max) | | **Rated Current ($I_{rms}$)** | 1.15 A | | **Saturation Current ($I_{sat}$)** | 1.34 A | | **Operating Temperature** | -40°C to +125°C | | **Package / Case** | 10.5mm x 10.3mm x 3.0mm (SMD) | --- ### ### Key Features and Design 1. **Magnetic Shielding:** The "DR" series features a ferrite drum core with a sleeve. This design minimizes Electromagnetic Interference (EMI), making it suitable for noise-sensitive environments like medical or telecommunications equipment. 2. **Low Profile:** With a maximum height of 3.0mm, it is ideal for "thin" electronics where vertical space is limited. 3. **High Power Density:** It offers a balanced ratio between small physical footprint and the ability to handle significant current without saturating. 4. **RoHS Compliant:** The "-R" suffix indicates that the part is lead-free and meets environmental standards. --- ### ### Applications The DR1030-330-R is typically found in the following circuits: * **Buck/Boost Converters:** Used for energy storage and filtering in voltage regulation. * **LED Drivers:** Providing stable current for lighting systems. * **Battery Powered Devices:** Used in laptops, tablets, and handheld instruments due to its high efficiency and low DCR. * **Computer Peripherals:** Filtering high-frequency noise in hard drives and docking stations. --- ### ### Identifying the Part Number The part number can be decoded as follows: * **DR:** Series name (Drum Core). * **1030:** Physical size (approx. 10mm diameter, 3.0mm height). * **330:** Inductance value ($33 \times 10^0 = 33 \text{ µH}$). * **R:** RoHS compliant.