## CM453232-R15M: Component Specifications The **CM453232-R15M** is a surface-mount (SMD) wire-wound chip inductor. It is commonly used in high-frequency circuits for signal processing and power management. --- ### 1. Key Technical Specifications The part number itself acts as a code for its primary electrical characteristics: | Feature | Specification | Description | | :--- | :--- | :--- | | **Inductance** | 0.15 µH | The "R15" denotes 0.15. | | **Tolerance** | ±20% | The "M" suffix indicates a 20% tolerance range. | | **Case Size (Metric)** | 4532 | 4.5mm x 3.2mm dimensions. | | **Case Size (Imperial)** | 1812 | Equivalent to 0.18 x 0.12 inches. | | **Rated Current** | ~450 mA | The maximum DC current the inductor can handle. | | **DC Resistance (DCR)** | ~0.44 Ω Max | The resistance of the internal wire coil. | | **SRF** | 450 MHz | Self-Resonant Frequency (minimum). | --- ### 2. Breakdown of the Part Number * **CM**: Series prefix (typically denotes Wire-wound Chip Inductor). * **453232**: Physical dimensions ($L \times W \times T$). 4.5mm length, 3.2mm width, 3.2mm thickness. * **R15**: Inductance value. The "R" acts as a decimal point ($R15 = 0.15$ microhenries). * **M**: Tolerance code ($M = \pm 20\%$). --- ### 3. Construction and Material * **Core Material:** Usually a Ferrite core which provides high permeability. * **Termination:** Tin-plated (Sn) over nickel (Ni) barrier for excellent solderability. * **Encapsulation:** Molded resin or epoxy for protection against environmental factors and mechanical stress. --- ### 4. Applications This specific inductor is generally found in: 1. **Communication Equipment:** Mobile phones, base stations, and RF modules. 2. **Consumer Electronics:** Televisions, VCRs, and digital cameras. 3. **Power Circuits:** Used for noise filtering and decoupling in DC/DC converters. ---