The **PCSFW104B-R47M** is a high-current, shielded power inductor typically used in DC-DC converter applications. It belongs to a category of surface-mount (SMD) magnetic components designed for high efficiency and compact power management. --- ### 1. Part Number Deciphering Understanding the nomenclature helps identify the physical and electrical characteristics of the component: | Segment | Meaning | Description | | :--- | :--- | :--- | | **PCSFW** | Series Name | High-current, shielded molded power inductor series. | | **104B** | Case Size | Dimensions (approx. 10.0 x 11.5 x 4.0 mm). | | **R47** | Inductance Value | **0.47 µH** (R denotes the decimal point). | | **M** | Tolerance | **±20%** (Standard for power inductors). | --- ### 2. Key Technical Specifications Based on the standard 104B series footprint, the typical specifications for a 0.47µH inductor are as follows: | Parameter | Typical Value | Unit | | :--- | :--- | :--- | | **Inductance** | 0.47 | µH | | **DC Resistance (DCR) Max** | ~1.3 - 2.0 | mΩ | | **Saturation Current (Isat)** | 30 - 45 | A | | **Heating Current (Irms)** | 20 - 30 | A | | **Operating Temperature** | -40 to +125 | °C | --- ### 3. Construction and Features * **Molded Structure:** The coil is encapsulated in a metal iron powder composite. This construction allows for "soft saturation" characteristics, meaning the inductance doesn't drop off abruptly when current increases. * **Magnetic Shielding:** The molded body acts as a natural shield, minimizing Electromagnetic Interference (EMI) with surrounding components on the PCB. * **Low DCR:** It uses flat wire or heavy-gauge copper to ensure minimal power loss through heat, which is critical for high-efficiency power supplies. --- ### 4. Common Applications This part is commonly found in high-demand electronic circuits: * **Voltage Regulator Modules (VRM):** Used in motherboards and GPU power phases. * **DC-DC Converters:** Buck, Boost, and Buck-Boost converters in automotive or industrial electronics. * **Battery Powered Devices:** High-current power management systems where space is limited but power density is high. --- ### 5. Footprint (Mechanical Data) ```text Approximate Dimensions: Length: 11.5 mm (max) Width: 10.0 mm (max) Height: 4.0 mm (max) ```