The **CTSPMA4020F-R47M** is a high-performance, surface-mount (SMD) power inductor. It is part of the metal alloy molded power inductor series, specifically designed for high-current applications where space and efficiency are critical. --- ### 1. Technical Specifications The part number itself follows a specific nomenclature that defines its characteristics: | Parameter | Specification | | :--- | :--- | | **Inductance** | 0.47 µH | | **Tolerance** | ±20% (indicated by 'M') | | **Case Size** | 4.0mm x 4.0mm x 2.0mm (4020) | | **DC Resistance (DCR)** | Typ: 8.4 mΩ / Max: 10.1 mΩ | | **Isat (Saturation Current)** | ~12.0 A (Current where inductance drops 30%) | | **Irms (Rated Current)** | ~8.0 A (Current causing 40°C temp rise) | | **Operating Temp** | -55°C to +125°C | --- ### 2. Key Features * **Molded Construction:** The coil is embedded in a metal powdered iron alloy core. This design provides "soft" saturation characteristics and excellent shielding against Electromagnetic Interference (EMI). * **High Efficiency:** Low DCR (Direct Current Resistance) minimizes power loss and heat generation. * **Compact Footprint:** The 4020 size is ideal for high-density PCB layouts. * **Low Buzz Noise:** The solid molded structure reduces acoustic noise generated by magnetostriction. --- ### 3. Application Use Cases This component is primarily used in DC-DC converters and power management modules. Typical applications include: 1. **Consumer Electronics:** Smartphones, tablets, and laptops. 2. **Point of Load (POL) Converters:** Providing stable voltage to CPUs, GPUs, and FPGAs. 3. **IoT Devices:** Battery-powered sensors requiring high efficiency in a small form factor. 4. **Automotive Infotainment:** Power supplies for displays and dashboard electronics. --- ### 4. Equivalent Series Comparison When selecting or substituting this part, consider the following physical and electrical dimensions: ```yaml Series: CTSPMA Footprint: 4.0 x 4.0 mm Height: 2.0 mm (Max) Core Material: Metal Alloy (Magnetic Shielded) Termination: Lead-free (RoHS Compliant) ```