The **LP404R-R45M** is an electronic component primarily associated with power electronics, specifically serving as a **High-Current Power Inductor** (often referred to as a "Molding Power Inductor"). These parts are critical in modern DC-DC converters and voltage regulator modules. --- ## 1. Technical Specifications The part number follows a standard nomenclature used by manufacturers (such as Link-PP or similar magnetic component producers). Below is the breakdown of its typical specifications: | Parameter | Specification (Typical) | Description | |:---|:---|:---| | **Inductance** | 0.45 µH | The "R45" in the suffix denotes 0.45 microhenries. | | **Tolerance** | ±20% | Indicated by the "M" suffix. | | **DCR (Direct Current Resistance)** | ~0.8 to 1.2 mΩ | Low resistance to minimize power loss. | | **Saturation Current (Isat)** | 25A - 35A | The current level where inductance drops significantly. | | **Operating Temperature** | -40°C to +125°C | Rated for industrial or automotive environments. | | **Construction** | Metal Alloy Powder | Molded construction for EMI shielding. | --- ## 2. Key Features * **Molded Structure:** The inductor is manufactured by pressing metal powder around a copper coil. This provides a "soft saturation" characteristic, meaning the inductance doesn't drop off instantly when current spikes. * **Magnetic Shielding:** Because it is fully encapsulated in magnetic powder, it produces very low electromagnetic interference (EMI). * **Compact Footprint:** Designed for surface mount technology (SMT), allowing for high-density PCB layouts. * **High Efficiency:** The extremely low DCR ensures that very little energy is wasted as heat, which is vital for battery-powered devices. --- ## 3. Common Applications This specific inductor is usually found in high-performance power stages: 1. **CPU/GPU Power Supplies:** Used in multi-phase Buck converters for processors. 2. **Server & Storage:** Powering high-speed data components. 3. **DC-DC Converters:** Point-of-Load (POL) modules converting 12V down to 1.xV. 4. **Networking Hardware:** High-current power rails in routers and switches. --- ## 4. Part Number Breakdown The code `LP404R-R45M` can be decoded as follows: * **LP**: Manufacturer series prefix. * **404**: Physical package size (e.g., 4.0mm x 4.0mm). * **R45**: Inductance value (0.45 microhenries). * **M**: Tolerance code (±20%).