The **TCDA1090-R15M** is a high-performance, shielded power inductor typically used in automotive and industrial power management circuits. It is designed to handle high currents while maintaining a compact surface-mount footprint. --- ### 1. Key Technical Specifications The part number follows a standard nomenclature used by manufacturers (such as Cyntec or similar power component specialists). Below are the estimated specifications: | Parameter | Specification | | :--- | :--- | | **Inductance** | 0.15 µH | | **Tolerance** | ±20% (Standard) | | **DCR (Direct Current Resistance)** | Ultra-low (Typically < 1.0 mΩ) | | **Isat (Saturation Current)** | Very High (Typically > 40A - 60A) | | **Irms (Rated Current)** | High thermal stability current | | **Dimensions** | 10.0mm x 9.0mm (approximate footprint) | | **Qualification** | Often AEC-Q200 (Automotive Grade) | --- ### 2. Core Features * **Metal Alloy Construction:** Unlike traditional ferrite inductors, these use a molded metal powder core. This allows for "soft saturation" characteristics, meaning the inductance doesn't drop off abruptly when current increases. * **Shielded Design:** The molded construction naturally provides magnetic shielding, reducing Electromagnetic Interference (EMI) with surrounding components. * **High Thermal Stability:** Designed to operate in high-temperature environments, often rated up to 125°C or 150°C. * **Low DCR:** The use of thick flat-wire or high-conductivity copper minimizes power loss (heat) during operation. --- ### 3. Typical Applications The **R15M (0.15µH)** is a very low inductance value, which implies it is intended for high-frequency switching regulators. * **Voltage Regulator Modules (VRMs):** Used in CPU/GPU power phases where extremely high current and fast transient responses are required. * **Automotive Electronics:** Power supplies for ADAS, infotainment, and ECU power rails. * **DC/DC Converters:** Point-of-Load (POL) converters where space is limited but power demand is high. --- ### 4. Part Number Breakdown While manufacturer codes vary slightly, the structure generally follows this logic: * **TCDA:** Series identifier (often denoting automotive grade/molded type). * **1090:** Physical size (approx. 10mm x 9mm). * **R15:** Inductance value ($R15 = 0.15$ microhenries). * **M:** Tolerance code ($M = \pm20\%$).