The SPM4012T-4R7M-CA is a shielded power inductor from TDK Corporation. These inductors are used in various DC-DC converter circuits and power management applications. The "4R7M" indicates an inductance of 4.7 µH with a tolerance of ±20% (M). The "CA" likely designates a specific series or variation with particular electrical or mechanical characteristics.

Applications:

• DC-DC Converters: Step-up, step-down, and buck-boost converters.
• Power Supplies: Used in both linear and switching power supplies.
• Mobile Devices: Power management for smartphones, tablets, and laptops.
• Wearable Technology: Efficient power conversion in smartwatches and fitness trackers.
• Automotive Electronics: Powering various electronic systems in vehicles.

Features:

• Shielded Construction: Reduces electromagnetic interference (EMI).
• Low DC Resistance (DCR): Minimizes power loss and improves efficiency.
• High Current Capacity: Handles high current without saturation.
• Compact Size: Suitable for space-constrained applications.
• RoHS Compliant: Environmentally friendly and complies with RoHS standards.

Benefits:

• Reduced EMI: Shielded construction minimizes interference with surrounding components.
• Improved Efficiency: Low DCR reduces power dissipation and improves energy efficiency.
• Stable Performance: Maintains inductance over a wide range of operating conditions.
• Compact Design: Small footprint allows for dense circuit board layouts.
• Reliable Operation: Designed for long-term stability and performance.

Additional Details:

The SPM4012T-4R7M-CA features a ferrite core material optimized for power applications. The physical dimensions are designed to allow automated assembly. Shielded inductors are essential in applications where EMI reduction is a key consideration. Its construction is typically a composite type with the wire wound around a core and then shielded. Lower DCR contributes to reduced heat generation, improving overall reliability. Commonly used in point-of-load (POL) converters.

Specific technical specifications, such as saturation current, operating temperature range, self-resonant frequency, and DC resistance, can be found in the TDK datasheet.