## Analysis of the LD1-8R2-R Component The **LD1-8R2-R** is a specific electronic component belonging to the **Power Inductor** category, manufactured by **Eaton (formerly Cooper Bussmann/Coiltronics)**. It is part of the **LD series** of high-current, surface-mount power inductors. --- ### 1. Key Technical Specifications The part number `LD1-8R2-R` can be decoded to understand its primary characteristics. The "8R2" signifies the inductance value, and the "-R" indicates RoHS compliance. | Parameter | Value / Specification | | :--- | :--- | | **Inductance** | 8.2 µH | | **Tolerance** | ±20% | | **Current Rating (Irms)** | ~2.18 Amperes (Typical) | | **Saturation Current (Isat)** | ~2.08 Amperes (Typical) | | **DC Resistance (DCR)** | ~0.066 Ohms (Max) | | **Operating Temperature** | -40°C to +125°C | | **Package Type** | Surface Mount (SMD) | | **Construction** | Drum Core (Ferrite) | --- ### 2. Physical Characteristics The LD series inductors are designed with a specific form factor to balance power density and heat dissipation. * **Core Material:** Ferrite core providing high efficiency and low core loss. * **Mounting:** SMD (Surface Mount Device) with two metalized pads for soldering. * **Size (Footprint):** The "LD1" refers to the specific package size (approx. 4.5mm x 4.0mm x 3.2mm). * **Shielding:** Usually **unshielded** or semi-shielded, meaning it may have higher EMI (Electro-Magnetic Interference) compared to fully shielded parts but offers higher saturation currents for its size. --- ### 3. Common Applications The LD1-8R2-R is commonly utilized in power management circuits where compact size and reliable performance are required. * **DC-DC Converters:** Used as an energy storage element in buck, boost, or buck-boost converters. * **Voltage Regulators:** Found in Point-of-Load (POL) modules for telecommunications. * **Consumer Electronics:** Power supplies for laptops, gaming consoles, and handheld devices. * **LED Drivers:** Used to stabilize current in lighting applications. --- ### 4. Part Number Breakdown ```text LD 1 - 8R2 - R | | | | | | | +-- RoHS Compliant | | +----------- Inductance Value (8.2 µH) | +-------------------- Size/Series Code (LD1) +------------------------ Series Name (Low Profile Drum) ```