The **PCMB105T-R47MS** is a high-current, surface-mount (SMD) power inductor commonly used in DC-DC converters and high-density power modules. It is part of the PCMB series, known for its compact size and low core loss. --- ### 1. Technical Specifications The part number itself contains the key technical parameters: | Parameter | Specification | Description | | :--- | :--- | :--- | | **Inductance** | 0.47 µH | The nominal inductance value (R47). | | **Tolerance** | ±20% | Indicated by the suffix "M". | | **DC Resistance (DCR)** | ~1.5 mΩ (Typ) | Low resistance to minimize heat and power loss. | | **Heat Rating Current** | ~26.0 A | Current that causes a 40°C temperature rise. | | **Saturation Current** | ~40.0 A | Current where inductance drops by 20-30%. | | **Operating Temp** | -55°C to +125°C | Suitable for industrial and automotive use. | --- ### 2. Physical Characteristics The "105T" in the code refers to the physical dimensions of the component. * **Footprint:** Approximately 11.5mm x 10.0mm. * **Height:** 5.0mm (Max). * **Construction:** Metal powder molded. This construction provides a "soft saturation" characteristic, meaning the inductance doesn't drop off sharply as current increases. * **Shielding:** Shielded construction (low EMI interference). --- ### 3. Key Features and Benefits * **High Efficiency:** Due to the extremely low DCR (Direct Current Resistance), it wastes very little power as heat. * **Magnetic Shielding:** The molded iron powder body naturally shields the magnetic field, preventing interference with nearby components on the PCB. * **Stability:** Designed to handle high-frequency switching noise and high-current transients without audible noise (buzzing). --- ### 4. Common Applications This inductor is typically found in high-performance power stages: * **GPU/CPU Power Supply:** Used in Voltage Regulator Modules (VRMs). * **Server/Data Centers:** For high-efficiency buck converters. * **Automotive Electronics:** Infotainment systems and ADAS modules. * **Battery Powered Devices:** Where high efficiency and small size are critical. --- ### 5. Identification Code Breakdown ```text PCMB 105T - R47 M S | | | | | Series Size Value Tol Rohs/Special (0.47uH) (20%) ```