The **CMLE051E-R12MS** is a high-performance, low-profile power inductor manufactured by **Cyntec**. It belongs to their miniature power choke series, designed for high-efficiency DC-DC conversion in space-constrained electronics. --- ## 1. Technical Specifications Below are the primary electrical and physical characteristics of the component: | Parameter | Specification | | :--- | :--- | | **Inductance** | 0.12 µH | | **Tolerance** | ±20% (M) | | **DC Resistance (DCR)** | 2.5 mΩ (Typical) / 3.0 mΩ (Max) | | **Saturation Current (Isat)** | 24.0 A (Approx.) | | **Heating Current (Irms)** | 16.0 A (Approx.) | | **Operating Temperature** | -55°C to +125°C | | **Dimensions (L x W x H)** | 5.4 mm x 5.2 mm x 1.5 mm | --- ## 2. Part Number Breakdown Understanding the nomenclature helps in identifying the specific features of this series: * **CMLE**: Series name (Cyntec Magnetic Low Energy/Profile series). * **051E**: Package size code (Approx. 5.0 x 5.0 mm with a 1.5mm height). * **R12**: Inductance value (R12 = 0.12 microhenries). * **M**: Tolerance (M = ±20%). * **S**: Standard internal code/packaging suffix. --- ## 3. Key Features & Construction The CMLE051E series is engineered for modern high-frequency power circuits: ### Construction * **Metal Alloy Powder Core:** Uses a composite metal powder molded around the coil. This provides "soft saturation" characteristics, meaning the inductance doesn't drop abruptly when current increases. * **Magnetically Shielded:** The molded construction naturally shields the component, reducing Electromagnetic Interference (EMI) with neighboring components. ### Performance Benefits * **High Current Handling:** Despite its small footprint, it can handle very high peak currents (up to 24A) without core saturation. * **Low DCR:** The low direct-current resistance minimizes power loss as heat, increasing overall system efficiency. * **Acoustic Noise Reduction:** The solid molded structure minimizes the physical vibration of the coil, reducing audible buzzing (coil whine). --- ## 4. Typical Applications This specific inductor is usually found in the "Buck" (Step-down) converter stages of: 1. **Graphic Cards (GPUs):** Voltage regulator modules (VRMs) for high-speed processors. 2. **Smartphones/Tablets:** Battery management and CPU power rails. 3. **Laptops/Ultrabooks:** High-density power supplies where height is restricted to <2mm. 4. **Servers:** Point-of-Load (POL) converters.